SWT TECH Series User manual

Safe W a t e r t echnologieS, i n c .
SERVICE MANUAL
SERVICE INSTRUCTIONS
& ASSEMBLY DRAWINGS
FOR
TECH CONTROL VALVES
(TECH, TECH-CS, TECH-EE, TECH-TC)
FILTERS, SOFTENERS, CONDITIONERS
1 INCH TECH SERIES CONTROL VALVE MODEL: WS1
1.25 INCH TECH SERIES CONTROL VALVE MODEL: WS1.25
1 INCH TECH-CS SERIES CONTROL VALVE MODEL: WS1CS
1.25 INCH TECH-CS SERIES CONTROL VALVE MODEL: WS1.25CS
1 INCH TECH-EE SERIES CONTROL VALVE MODEL: WS1EE
1.25 INCH TECH-EE SERIES CONTROL VALVE MODEL: WS1.25EE
1 INCH TECH-TC SERIES CONTROL VALVE MODEL: WS1TC
1.25 INCH TECH-TC SERIES CONTROL VALVE MODEL: WS1.25TC
NOVEMBER 2022

Page 2
Table of Contents
3. Introduction
3. General Warnings
4. Specifications
4. Quick Reference Specifications
5. Control Valve Function
5. Control Valve Components
6. Drive Assembly
6. Drive Cap Assembly, Main Piston, and Regenerant Piston
6. Spacer Stack Assembly
7. Injector Cap, Screen, Injector Plug, and Injector
8. Refill Flow Control Assembly or Refill Port Plug
8. Drain Line Flow Control and Fitting Assembly
9. Water Meter or Meter Plug
9. Mixing Valve (Optional)
10. Installation Fitting Assemblies
10. Bypass Valve (Optional)
11. Bypass Valve Operation
12. Installation
14. Service Instructions
21. Drawings and Part Numbers
22. WS1 & WS1.25 Front Cover and Drive Assembly
23. WS1CS & WS1.25CS Front Cover and Drive Assembly
24. WS1EE & WS1.25EE Front Cover and Drive Assembly
25. WS1TC & WS1.25TC Front Cover and Drive Assembly
26. WS1 Drive Cap Assembly, Downflow Piston, Upflow Piston, Regenerant Piston, and Spacer Stack Assembly
27. WS1.25 Drive Cap Assembly, Downflow Piston, Upflow Piston, Regenerant Piston, and Spacer Stack Assembly
28. Injector Cap, Injector Screen, Injector, Plug, and O-ring
29. Refill Flow Control Assembly and Refill Port Plug
30. Drain Line – 3/4 inch
31. Drain Line – 1 inch
32. Water Meter, Meter Plug, and Mixing Valve
33. Installation Fitting Assemblies
37. Bypass Valve
38. Flow Diagrams – Service and Backwash
39. Flow Diagrams – Downflow Brine and Upflow Brine
40. Flow Diagrams – Rinse and Fill
41. WS1 Service Spanner Wrench
42. Injector Graphs US Units: Injector Draw, Slow Rinse, and Total Flow Rates
44. Injector Graphs Metric Units: Injector Draw, Slow Rinse, and Total Flow Rates
46. WS1 & WS1.25 Identification
47. Limited Warranty

Introduction
This manual provides information about the service of the Safe Water Technologies 1 inch and
1.25 inch Tech Series Control Valves for use in water softener or water filter applications.
General Warnings
• Thecontrolvalve,fittings,and/orbypassaredesignedtoaccommodateminorplumbingmisalignmentsbutare
NOT designed to support the weight of a system or the plumbing.
• Hydrocarbons such as kerosene, benzene, gasoline, etc., may damage products that contain o-rings or
plastic components. Exposure to such hydrocarbons may cause the products to leak. DO NOT USE the
product(s) contained in this document on water supplies that contain hydrocarbons such as kerosene,
benzene, gasoline, etc.
• The Tech Series water meter should not be used as the primary monitoring device for critical or health
effect applications.
• DonotuseVaseline,oils,otherhydrocarbonlubricants,orspraysiliconeanywhere.Asiliconelubricantmaybe
used on black o-rings but is not necessary. Avoid any type of lubricants, including silicone, on the clear lip seals.
• ThenutsandcapsaredesignedtobeunscrewedortightenedbyhandorwiththeWS1ServiceSpanner
Wrench (see page 41). If necessary, a pliers can be used to unscrew the nut or cap. Do not use a pipe wrench to
tighten or loosen nuts or caps. Do not place a screwdriver in the slots on the caps and/or tap with a hammer.
• Donotusepipedopeorothersealantsonthreads.UseTeflontapeonthreadedinlet,outlet,anddrainfittings.
Teflon tape is not necessary on the nut connection or caps because of o-ring seals.
• Aftercompletinganyvalvemaintenanceinvolvingthedriveassemblyorthedrivecapassemblyandpistons,
unplug the power source jack from the printed circuit board (black wire) and plug back in, or:
1. For valves that use a Tech-TC circuit board (three buttons), press and hold the SET and buttons for
three seconds. (The cover button may have other names like SET HOUR, CLOCK, or SET CLOCK, but the
circuit board is labeled with SET.)
2. For all other Tech Series valves, press and hold the NEXT and REGEN buttons for three seconds.
This resets the electronics and establishes the service piston position. The display should flash all wording, then
flash the software version, and then reset the valve to the service position.
• Allplumbingshouldbedoneinaccordancewithlocalplumbingcodes.Thepipesizeforthedrainlineshouldbea
minimum of 1/2 inch. Backwash flow rates in excess of 7 gpm (26.5 lpm), or length in excess of 20 feet (6.1 m),
require 3/4 inch drain line.
• Solderjointsnearthedrainmustbemadepriortoconnectingthedrainlineflowcontrolfitting.Leaveatleast
6 inches between the drain line control fitting and solder joints when soldering pipes that are connected on the
drain line control fitting. Failure to do this could cause interior damage to the drain line flow control fitting.
• Whenassemblingtheinstallationfittingpackage(inletandoutlet),connectthefittingtotheplumbingsystem
first and then attach the nut, split ring, and o-ring. Heat from soldering or solvent cements may damage the nut,
split ring, and o-ring. Solder joints should be cool and solvent cements should be set before installing the nut,
split ring, and o-ring. Avoid getting primer and solvent cement on any part of the o-rings, split rings, bypass
valve, or control valve.
• Plugintoanelectricaloutlet.Note:Allelectricalconnectionsmustbeconnectedaccordingtolocalcodes.
(Be certain the outlet is uninterrupted.)
• Installagroundingstraponmetalpipes.
Page 3

Table 1
Specifications
Table 2
Quick Reference Specifications
Page 4
* Height is based off the top of tank. Installer to verify proper engagement and allowance for tank expansion.
** Prior to January 2019: –3/4 to +0
*** Prior to January 2019: –19mm to +0mm
Minimum / Maximum Operating Pressures 20 psi (138 kPa) to 125 psi (862 kPa or 8.6 bar)
Minimum / Maximum Operating Temperatures 40°F (4°C) to 110°F (43°C)
AC Adapter U.S. International
Supply Voltage 100-120 VAC 100-240 VAC
Supply Frequency 50/60Hz 50/60Hz
Output Voltage 15 VDC 15 VDC
Output Current 500 mA 500 mA
No user serviceable parts are on the PC board, the motor, or the AC adapter. The means of disconnection from the main power supply is by
unplugging the AC adapter from the wall.
Service Flow Rate (includes bypass and meter)
1 inch Valve 27 gpm (102.2 lpm, 6.1 m3/h) @ 15 psig (103 kPa) drop
1.25 inch Valve 32 gpm (121.1 lpm, 7.3 m3/h) @ 15 psig (103 kPa) drop
Backwash Flow Rate (includes bypass)
1 inch Valve 27 gpm (102.2 lpm, 6.1 m3/h) @ 25 psig (172 kPa) drop
1.25 inch Valve 30 gpm (113.5 lpm, 6.8 m3/h) @ 25 psig (172 kPa) drop
CV Service
1 inch Valve 7.0
1.25 inch Valve 8.8
CV Backwash
1 inch Valve 5.4
1.25 inch Valve 6.4
RegenerantRellRate 0.5 gpm (1.9 lpm)
Injectors See Injector Order Information (page 7)
Brine Line 20 psi (138 kPa) to 125 psi (862 kPa)
Inlet / Outlet 40°F (4°C) to 110°F (43°C)
DistributorTubeSizing* Size Height
1 inch Valve 1.05 inch OD (3/4 inch NPS) ±0.5 inch
1.25 inch Valve 1.32 inch OD (1.0 inch NPS) –0.5 to 0.25 inch **
1.25 inch Valve (International) 32 mm –12.7 to 6.35 mm ***
Tank Connection 2.5 inch #8 NPSM
Shipping Weight 4.5 lb (2.0 kg)
PC Board Memory Nonvolatile EEPROM (electrically erasable programmable read only memory)
Compatible with Regenerants/Chemicals Sodiumchloride,potassiumchloride,potassiumpermanganate,sodiumbisulte,
chlorine, and chloramines

Control Valve Function
This glass-filled Noryl 1(or equivalent) fully automatic control valve is designed as the primary control center to direct
and regulate all cycles of a water softener or filter. When the Tech Series control valve is manufactured as a softener,
the control valve can be ordered to perform downflow or upflow regeneration. When the Tech Series control valve is
set up as a filter, the control valve can be set to perform downflow regeneration or simply backwash. The control
valve can be set to regenerate on demand (consumption of a predetermined amount of water) and/or as a time clock
(passage of a particular number of days). The control valve can be set so that a softener can meet the Water Quality
Association (WQA) Standard S100 or NSF/ANSI Standard 44 efficiency rating.
NOTE: It is NOT recommended to change control valves from downflow to upflow brining or vice versa in
the field. The valve bodies for downflow and upflow are unique to the regeneration type and should not be
interchanged. A mismatch of valve body and regeneration piston will result in hard water bypass during service.
The control valve is compatible with a variety of regenerants and resin cleaners. The control valve is capable of
routing the flow of water in the necessary paths to regenerate or backwash water treatment systems. The injector
regulates the flow of brine or other regenerants. The control valve regulates the flow rates for backwashing, rinsing,
and the replenishing of treated water into a regenerant tank, when applicable.
The control valve uses no traditional fasteners (e.g. screws); instead clips, threaded caps and nuts, and snap type
latches are used. Caps and nuts only need to be firmly hand tightened because radial seals are used. Tools required
to service the valve include one small blade screwdriver, one large blade screwdriver, pliers, and a pair of hands. A
plastic wrench is available which eliminates the need for screwdrivers and pliers (see page 41). Disassembly for
servicing takes much less time than comparable products currently on the market. Control valve installation is made
easy because the riser can be cut 1/2 inch above to 1/2 inch below the top of the tank thread. The riser is held in
place by an o-ring seal, and the control valve has a bayonet lock feature for upper distributor baskets.
The AC adapter comes with a 15 foot power cord and is designed for use with the control valve. The AC adapter is
for dry location use only. In the case of a power outage, the control valve remembers all settings until the battery
power is depleted. After the battery power is depleted, the only item that needs to be reset is the time of day; other
values are permanently stored in the nonvolatile memory. The control valve battery is not rechargeable but is
replaceable.
Control Valve Components
The Tech Series 1 inch & 1.25 inch Control Valves consist of the following components:
1. Drive Assembly
2. Drive Cap Assembly, Main Piston, and Regenerant Piston
3. Spacer Stack Assembly
4. Injector Cap, Screen, Injector Plug, and Injector
5. Refill Flow Control Assembly or Refill Port Plug
6. Drain Line Flow Control and Fitting Assembly
7. Water Meter or Meter Plug
8. Mixing Valve (optional)
9. Installation Fitting Assemblies
10. Bypass Valve (optional)
Note: The WS1 & WS1.25 share many of the same components. See page 46 for control valve identification.
Page 5
1. Noryl is a trademark of SABIC.

Drive Assembly
The drive assembly consists of the following parts:
1. Drive Bracket
2. Printed Circuit (PC) Board
3. Motor
4. Drive Gears
5. Drive Gear Cover
The drive bracket holds the PC board, the motor, the drive gears, and the drive gear cover in place.
The PC board receives and retains information, displays the information, determines when to regenerate, and
initiates regeneration. The display shows different types of information in the initial system setup (for softeners or
filters), installer display settings, diagnostics, valve history, or user display settings.
The PC board powers the motor. The PC board’s two-prong jack connects wires to the direct current (DC) motor. The
motor is held in place on the drive bracket by a spring-loaded clip and a small bulge in the plastic, which fits in one of
the slots on the motor housing. The motor turns the drive gears that drive the piston to cycle positions for
backwashing, regeneration, rinsing, refill, or service. The motor is fully reversible (turns both ways) and changes the
direction of rotation to change the direction of the piston motion. The motor is easily replaced if necessary.
Therearethreedrivegearsheldinplacebythedrivegearcover.Allthreedrivegearsarethesamesize.Areflective
coating is applied to the gears. As the center drive gear turns, a light shines on the coating and a light sensing diode
determines if a light pulse was returned. The PC board counts the pulses and determines when to stop driving the motor.
Drive Cap Assembly, Main Piston, and Regenerant Piston
Thedrivegearsturnthemaingearofthedrivecapassembly,whichmovesthepiston.Thescrew-driven,horizontally
moving piston stops at specific positions to direct the flow of water to backwash, regenerate, rinse, or refill. The PC
board determines the position of the piston by counting pulses produced when the piston is moved. An optical sensor
looking at one of the reduction drive gears generates these pulses. Each cycle position is defined by a number of
pulses.Thecounteriszeroedeachtimethevalvegoestotheserviceposition.ThePCboardfindstheservice
position by noting the increase in current delivered to the motor when the mechanical stop at the service position is
reached. This method of controlling piston position allows for greater flexibility and requires no switches or cams.
One of four main pistons is always used: (Note: Upflow options are not avaialble for Tech-TC Series control valves.)
1. A 1.25 inch diameter downflow piston is used when the WS1 control valve is used as a downflow softener,
regenerating filter, or non-regenerating filter.
2. A 1.25 inch diameter upflow piston is used when the WS1 control valve is used as an upflow softener.
3. A 1.5 inch diameter downflow piston is used when the WS1.25 control valve is used as a downflow softener,
regenerating filter, or non-regenerating filter.
4. A 1.5 inch diameter upflow piston is used when the WS1.25 control valve is used as an upflow softener.
If the control valve is used as a softener or a regenerating filter, a regenerant piston must be attached to the main
piston. If the control valve is to be used on a system that does not require a regenerant to be added, the regenerant
piston must be removed.
Spacer Stack Assembly
The spacer stack assembly provides the necessary flow passage for water during the different cycles. The all-plastic
spacer stack assembly is a one-piece design which allows the stack to be removed using your fingers.
The exterior of the stack is sealed against the body bore with self lubricating EPDM o-rings, while the interior surface
is sealed against the piston using slippery self-cleaning directional (one-way) silicone lip seals. The lip seals are clear
in color and have a special slippery coating so that the piston does not need to be lubricated.
Page 6

Injector Cap, Screen, Injector Plug, and Injector
The screen, injector, and/or injector plug(s) are installed under the injector cap in an easy-to-access location on top
of the valve. The injector cap contains four slots so no water accumulates in the cap. The injector cap is designed to
be hand tightened.
Under the injector cap there is an easy-to-clean, removable screen to prevent fouling of the injector. There are two
holes under the injector cap labeled DN and UP. The holes will be filled with a plug or an injector.
The plug (P/N: LC-V3010-1Z) prevents water from traveling a certain pathway. The injector lets water pass through
thepathway.Theself-priminginjectorincreasesthevelocityofthewater,creatingazoneofnegativepressurethat
draws in the concentrated liquid regenerant, such as sodium chloride (brine), potassium permanganate, etc. The
regenerant blends with the stream of water, which passes through the media to regenerate the bed.
The injector provides a consistent regenerant/water mixture ratio over the entire operating pressure range of the
control valve. The injector provides good performance in a variety of applications, which may involve elevated drain
lines and long regenerant draw lengths. Injectors are chosen by knowing the type, amount, and regenerant flow rate
for a particular type of media. Guidelines can be found in the media manufacturer’s literature. The color coded
injectors give different regenerant draw, slow rinse, and total flow rates over the pressure range. See Table 3 (below)
for color codings, and injector graphs (pages 42 to 45) for total, slow rinse, and draw flow rates.
The control valve has been manufactured to be one of the following:
1. Regeneration downflow 1 & 1.25 inch Tech control valve (for softeners or regenerating filters)
— DN location contains injector, UP location contains plug
2. Regeneration upflow 1 & 1.25 inch Tech control valve (for softeners—not avaialble for Tech-TC Series valves)
— UP location contains injector, other hole contains plug
3. No regenerant 1 & 1.25 inch Tech control valve (for non-regenerating filters)
— DN location contains plug, UP location contains plug, refill elbow replaced by refill port plug (P/N: LC-V3195-01)
NOTE: It is not recommended to convert valves from upflow to downflow, or vice versa, in the field. Separate areas
in the control valve are used to supply water to the injector for upflow or downflow valves.
Table 3
Injector Order Information
Page 7
* Actualtanksizeusedmayvarydependingonthedesignandapplicationofthesystem.Tankdiameterisanapproximation for the following:
A. Downflow softener using standard mesh synthetic cation exchange media regenerating with sodium chloride.
B. Upflow softener using standard mesh synthetic cation exchange media regenerating with sodium chloride, an inlet water pressure of 30 to 50 psi (2.1 to
3.4 bar), and water temperature of 60°F (15.6°C) or higher. Higher pressures or lower temperatures would need smaller injectors to avoid lifting the bed.
** Not applicable for Tech-TC control valves
Injector Part Number Injector Color
Typical Tank Diameter *
Down Up **
LC-V3010-1A Black 6 inch 8 inch
LC-V3010-1B Brown 7 inch 9 inch
LC-V3010-1C Violet 8 inch 10 inch
LC-V3010-1D Red 9 inch 12 inch
LC-V3010-1E White 10 inch 13 inch
LC-V3010-1F Blue 12 inch 14 inch
LC-V3010-1G Yellow 13 inch 16 inch
LC-V3010-1H Green 14 inch 18 inch
LC-V3010-1I Orange 16 inch 22 inch
LC-V3010-1J Light Blue 18 inch —
LC-V3010-1K Light Green 22 inch —

Refill Flow Control Assembly or Refill Port Plug
The refill flow control assembly consists of an elbow, flow control retainer, and flow control washer. The flow control
retainer fits in the elbow. The flow control retainer houses the flow control washer which controls the flow rate when
the regenerant tank is being refilled. The flow control is a flexible washer-like part with a small orifice and a precision
molded contour that delivers a steady 0.5 gpm regenerant tank refill rate at varying inlet pressures.
Refill is accomplished with filtered water on filters and soft water on water softeners.
The refill flow control elbow assembly is attached to the control valve with a locking clip. The locking clip allows the
elbow to rotate 270 degrees so the outlet can be orientated towards the regenerant tank.
The control valve has a standard refill elbow to which a 3/8 inch flexible tube can be connected. An optional elbow can
be ordered which accommodates a 1/2 inch flexible tube for a high regenerant draw rate situation (G injectors and
larger). Both elbows use the same refill flow control and retainer.
If the control valve is to be used as a non-regenerant filter control valve, the refill elbow is removed and replaced with
a refill port plug (P/N LC-V3195-01).
Drain Line Flow Control and Fitting Assembly
The drain line flow control assembly includes a drain line flow control and a fitting. The drain line flow control allows
proper media bed expansion by regulating the flow rate to the drain. The drain line flow control is a flexible washer-
like part with an orifice and a precision molded contour. The flow rates are within ± 10% over the pressure range of
20 psi to 125 psi (1.4 bar to 8.6 bar). See Table 4 (below) for flow rate information.
Table 4
Drain Line Flow Control and Fitting Assembly Information
Page 8
Drain Line Fitting Drain Line Flow Control
Part Number
Number on
Drain Line Flow Control
Backwash Flow Rate
(gpm)
Backwash Flow Rate
(lpm)
3/4 inch LC-V3162-007 007 0.7 2.6
3/4 inch LC-V3162-010 010 1.0 3.8
3/4 inch LC-V3162-013 013 1.3 4.9
3/4 inch LC-V3162-017 017 1.7 6.4
3/4 inch LC-V3162-022 022 2.2 8.3
3/4 inch LC-V3162-027 027 2.7 10.2
3/4 inch LC-V3162-032 032 3.2 12.1
3/4 inch LC-V3162-042 042 4.2 15.9
3/4 inch LC-V3162-053 053 5.3 20.1
3/4 inch LC-V3162-065 065 6.5 24.6
3/4 inch LC-V3162-075 075 7.5 28.4
3/4 inch LC-V3162-090 090 9.0 34.1
3/4 inch LC-V3162-100 100 10.0 37.9
1 inch LC-V3190-090 090 9.0 34.1
1 inch LC-V3190-100 100 10.0 37.9
1 inch LC-V3190-110 110 11.0 41.6
1 inch LC-V3190-130 130 13.0 49.2
1 inch LC-V3190-150 150 15.0 56.8
1 inch LC-V3190-170 170 17.0 64.3
1 inch LC-V3190-200 200 20.0 75.7
1 inch LC-V3190-250 250 25.0 94.6

The drain line flow control and fitting are located on top of the control valve and replaceable without the use of
special tools.
The drain line flow control can be installed in the standard 3/4 inch drain line elbow, which accommodates 5/8 inch
polytube or 3/4 inch NPT drain line connections. The optional nut and polytube insert for the 3/4 inch drain line elbow
is designed for use with flexible polytube only. The 3/4 inch drain line elbow can be rotated 180 degrees so the outlet
can be orientated to the nearest drain. The same retainer is used for all drain line flow controls for the 3/4 inch fitting.
Drain line flow controls designed for the 3/4 inch fitting are available for flow rates ranging from 0.7 to 10 gpm (2.6 to
37.9 lpm).
An optional 1 inch straight drain line fitting is available to accommodate drain line flow rates ranging from 9 to 25 gpm
(34.1 to 94.6 lpm). This fitting is straight but still connects to the control valve using the same locking clip. The drain line
flow control is located between two fitted parts (the fitting acts as the retainer). The nut is unscrewed to access the drain
line flow control.
Water Meter or Meter Plug
Tech-TC Series control valves do not use a water meter.
The water meter is installed on the outlet side of the control valve. The water meter uses a turbine to measure
gallons of treated water. The turbine rotates with the flow of water and reports its rate of rotation through Hall effect 2
circuitry to the printed circuit (PC) board. This rotation permits the PC board to record the total volume of treated
water and the flow rate. The small, centrally located magnet is shielded from water, which substantially reduces iron-
fouling problems with the turbine.
NOTE: This water meter should not be used as the primary monitoring device for critical or health effect
applications.
Operating Pressure: 20 psi minimum / 125 psi maximum
Operating Temperature: 40°F minimum / 110°F maximum
The turbine is accurate to within ± 5% over a wide operating flow rate range (0.25 gpm [0.95 lpm] up to control valve
maximums) and has a very low pressure drop. Water used for regeneration is not metered. If the control valve is set to
prefill the regenerant, water used between the prefill cycle up to the start of the regeneration cycle is metered. If the
control valve is in regeneration mode (e.g. a backwash cycle) and there is a water demand, that water usage is not
metered.
When facing the front of the control valve, the water meter is positioned on the left-hand side of the control valve.
Allow sufficient clearance to clean and repair the water meter without disconnecting the plumbing or disassembling
any other parts of the control valve.
Control valves can be ordered with a meter plug (i.e. no electronics or turbine) rather than a water meter if desired.
Control valves without meters should only be set up for time clock operation (i.e. no water meter, no demand-initiated
regeneration). Control valves with water meters provide a wider variety of useful information. See Operation &
Instruction Manuals for more information concerning specific Tech Series Control Valves.
Mixing Valve (Optional)
The mixing valve is installed on the outlet side of the control valve. It is used to blend raw water with treated water.
To adjust the blended water, close the mixing valve. Open a water faucet to the desired flow rate. Open the mixing
valve until the desired hardness is reached. Close the faucet.
Page 9
2. Some semiconductor materials exhibit a phenomenon in the presence of a magnetic field that is adaptable to sensing devices. When a current is passed through
one pair of wires attached to a semiconductor, another pair of wires properly attached and oriented with respect to the semiconductor will develop a voltage
proportional to the magnetic field present and the current in the other pair of wires. Holding the exciting current constant and moving a permanent magnet near the
semiconductor produces a voltage output proportional to the movement of the magnet. Hall effect devices provide a high speed response, excellent temperature
stability, and no physical contact.

Installation Fitting Assemblies
The installation fittings are used to connect the optional bypass or the control valve to the plumbing system. See
pages 33 to 36 for available fitting assemblies.
The installation fitting assemblies are sold in pairs and consist of two fittings, two nuts, two split rings, and two o-rings.
The installation fitting assemblies and the bypass valve are sold separately from the control valve.
Both elbow fittings have a unique drill out feature to allow a 1/4 inch NPT connection to the inlet and/or outlet which
can be used for a RO feed, test ports, pressure tap ports, etc.
Bypass Valve (Optional)
The bypass valve is typically used to isolate the control valve from the plumbing system’s water pressure in order to
perform control valve repairs or maintenance. The WS1 bypass valve is particularly unique in the water treatment
industry due to its versatility and state-of-the-art design features. The 1 inch full flow bypass valve incorporates four
positions,includingadiagnosticpositionthatallowsservicepersonneltoworkonapressurizedsystemwhilestill
providing untreated bypass water to the facility or residence. Its completely non-metallic, all-plastic design allows for
easy access and serviceability without the need for tools.
The bypass body and rotors are glass-filled Noryl 3(or equivalent) and the nuts and caps are glass-filled
polypropylene.Allsealsareself-lubricatingEPDMtohelppreventvalveseizingafterlongperiodsofnon-use.
Internal o-rings can easily be replaced if service is required.
The bypass consists of two interchangeable plug valves that are operated independently by red arrow-shaped
handles. The handles identify the flow direction of the water. The plug valves enable the bypass valve to operate in
four positions.
1. Normal Operation Position: The inlet and outlet handles point in the direction of flow indicated by the engraved
arrows on the control valve. Water flows through the control valve during normal operation, and this position also
allows the control valve to isolate the media bed during the regeneration cycle. See Figure 1 (page 11).
2. Bypass Position: The inlet and outlet handles point to the center of the bypass. The control valve is isolated from
the water pressure contained in the plumbing system. Untreated water is supplied to the plumbing system. See
Figure 2 (page 11).
3. Diagnostic Position: The inlet handle points in the direction of flow, and the outlet handle points to the center of
bypass valve. System water pressure is allowed to the control valve and the plumbing system, while not allowing
water to exit from the control valve to the plumbing. See Figure 3 (page 11).
4. Shut Off Position: The inlet handle points to the center of the bypass valve, and the outlet handle points in the
direction of the flow. The water is shut off to the plumbing system. If water is available on the outlet side of the
softener, it is an indication of water bypass around the system (i.e. a plumbing connection somewhere in the building
bypasses the system). See Figure 4 (page 11).
Page 10
3. Noryl is a trademark of SABIC.

Bypass Valve Operation
Figure 1. NORMAL OPERATION FIgure 2. BYPASS OPERATION
Figure 3. DIAGNOSTIC MODE FIgure 4. SHUT OFF MODE
Page 11

Installation
Allow one foot of clearance to service the control valve.
The control valve will withstand transportation and storage temperatures of -13°F (-25°C) to 131°F (55°C), and for
shortperiodsupto158°F(70°C).Ifthecontrolvalvehasbeenexposedtofreezingconditions,letthevalvewarmup
to room temperature before running water through it. The control valve has been packaged to prevent damage from
the effects of normal humidity, vibration, and shock.
Refill Flow Control Assembly or Refill Port Plug
Control valves that are setup for backwash only come equipped with a refill port plug. The refill port plug has no
regenerant line connection.
Control valves that use a regenerant come equipped with a 3/8 inch refill flow control assembly. To switch to the 1/2
inch refill flow control assembly, remove the refill flow control and retainer (from the 3/8 inch refill elbow) by twisting
and pulling out. Insert the refill flow control and retainer into the 1/2 inch refill elbow.
To complete the regenerant line connection, orientate the outlet in the desired direction and push the plastic insert
into the polytube. Push the polytube into the nut. Do not use pipe dope or other sealants on threads. The threads for
the compression nut do not need Teflon tape. Tighten the nut securely to create a pressure tight connection. A pliers
or crescent wrench may be used to tighten or unscrew the nut. The nut, gripper, and retainer sleeve is a three-piece
assembly that can come apart if removed from the elbow body. Parts must be reassembled exactly as shown in the
Refill Flow Control Assembly drawing (page 29) to function properly. If the nut is completely removed from the body,
slip the nut, plastic gripper, and retainer sleeve onto the tube, then tighten onto the fitting.
Drain Line Flow Control and Fitting Assembly
To determine which drain line flow control to use, obtain media bed expansion tables from the media manufacturer,
choose a water temperature, and look up the desired backwash rate per square foot of bed area. Then calculate the
backwash rate using the desired tank diameter. Using Table 4 (page 8), choose the drain line flow control that has
the backwash flow rate closest to the calculated backwash rate. If choosing to use an external drain line flow control,
use an elbow fitting that does not contain a hole.
If the drain line is a 5/8 inch flexible polytube, slide the nut onto the polytube, then place the polytube insert into the
end of the polytube and tighten the nut onto the 3/4 inch drain line fitting. The nut is only designed for use with
flexible polytube. Use other nuts if attaching different materials.
To access the drain line flow control, remove the locking clip by pulling it straight out. Pull the fitting out and replace
the locking clip so that it is not misplaced. The drain line fitting is pressed in and has an o-ring seal.
In the 3/4 inch elbow, the white flow control retainer is pressed in and has an o-ring seal. The retainer can be
removed by rotating and pulling. The flow control can be removed by prying upward with a small, flat blade
screwdriver in one of the slots on the side. The drain line flow control and retainer can be chemically cleaned in
dilute sodium bisulfite or vinegar, or replaced. Do not use a wire brush to clean the flow control or the washer. The
washers are identified with three numbers, which correspond to the flow rate. When reinstalling, make sure the
identifying number and the rounded inside diameter on the washer is visible when seated in the retainer. The white
flow control washer retainer can also be removed and cleaned. Push the retainer in firmly when reinstalling.
In the 1 inch straight fitting, the retainer is the fitting. Unscrew the nut to access the flow control. The drain line flow
control and the fitting can be chemically cleaned or replaced. Do not use a wire brush to clean the flow control or the
fitting.
Do not use Vaseline, oils, or other unacceptable lubricants on o-rings. A silicone lubricant may be used on the black
o-ring. Use a pliers or crescent wrench to tighten or unscrew the nut. Do not use a pipe wrench to tighten or loosen
the nut. Do not use pipe dope or other sealants on the threads. Use Teflon tape on the threads of the drain line
control fitting when installing a 3/4 inch NPT or 1 inch straight fitting.
Page 12

Installation Fitting Assemblies
The installation fittings connect to the control valve or the bypass valve using nuts that only require hand tightening.
Hand tightened nut connections between the control valve and installation fittings, the control valve and bypass
valve, and the bypass valve and installation fittings allow for easy serviceability. Do not use a pipe wrench to tighten
the nuts on the installation fittings. Hand tighten only.
The split ring retainer design holds onto the nut and allows the load to be spread over the entire nut surface area,
thus reducing the chance for leakage. The split ring design incorporated into the installation fittings allows
approximately two degrees off-axis alignment to the plumbing system. The installation fittings are designed to
accommodate minor plumbing misalignments, but are not designed to support the weight of a system or the
plumbing.
When assembling the installation fitting package, connect the fitting to the plumbing system first and then attach the
nut, split ring, and o-ring. Heat from soldering or solvent cements may damage the nut, split ring, or o-ring. Solder
joints should be cool and solvent cements should be set before installing the nut, split ring, and o-ring. Avoid getting
primer and solvent cement on any part of the o-rings, split rings, bypass valve, or control valve. Solvent cements and
primers should be used in accordance with the manufacturer’s instructions.
Slip the nut onto the fitting first, the split ring second, and the o-ring last. Hand tighten the nut. If the fitting is leaking,
tightening the nut will not stop the leak. Remove the nut, remove the fitting, and check for damage or misalignment
of the o-ring.
Do not use pipe dope or other sealant on threads. Use Teflon tape on the threaded inlet, outlet, and drain fittings.
Teflon tape is not necessary on the nut connection or caps because of o-ring seals.
Do not use Vaseline, oils, or other unacceptable lubricants on o-rings. A silicone lubricant may be used on black
o-rings.
Bypass Valve
The bypass valve easily connects to the control valve body using nuts that only require hand tightening. Hand
tightened nut connections between the control valve and the fittings, the control valve and the bypass valve, and the
bypass valve and the installation fittings allow for easy serviceability. The split ring retainer design holds onto the nut
and allows the load to be spread over the entire nut surface area, reducing the chance for leakage. The split ring
design incorporated into the bypass allows approximately two degrees off-axis alignment to the plumbing system.
The bypass is designed to accommodate minor plumbing misalignments, but is not designed to support the weight of
a system or the plumbing.
Avoid getting primer and solvent cement on any part of the o-rings, split rings, bypass valve, or control valve. Do not
use pipe dope or other sealant on threads. Teflon tape is not necessary on the caps because of o-ring seals.
Do not use Vaseline, oils, or other unacceptable lubricants on o-rings. A silicone lubricant may be used on black
o-rings.
Mixing Valve
The mixing valve is an option on the control valve. If the control valve is ordered with a mixing valve it will be
installed in the control valve assembly process.
To adjust the blended water, close the mixing valve. Open a water faucet to the desired flow rate. Open the mixing
valve until the desired hardness is reached. Close the faucet.
NOTE: The use of the mixing valve requires modification to the valve body. These modifications should not be done
in the field.
Page 13

Service Instructions
NOTE: When servicing the control valve, water may leak from the valve. Water from the valve may create a
slip hazard. Clean up ALL water spills.
ALWAYS disconnect the control valve from electrical power prior to servicing the valve.
Drive Assembly
Remove the valve cover to access the drive assembly.
Disconnect the power source plug (black wire) from the PC board prior to disconnecting the motor or water meter
plugs from the PC board. The power source plug connects to the four-pin jack. The motor plug connects to the two-pin
jack on the left-hand side of the PC board. The water meter plug (gray wire) connects to the three-pin jack on the far
right-hand side of the PC board.
The PC board can be removed separately from the drive bracket, but it is not recommended. Do not attempt to remove
the display panel from the PC board. Handle the board by the edges. To remove the PC board from the drive bracket,
unplug the power, water meter, and motor plugs from the PC board. Lift the middle latch along the top of the drive
bracket while pulling outward on the top of the PC board. The drive bracket has two plastic pins that fit into the holes on
the lower edge of the PC board. Once the PC board is tilted approximately 45 degrees from the drive bracket, it can be
lifted off of these pins. To reinstall the PC board, position the lower edge of the PC board so that the holes in the PC
board line up with the plastic pins. Push the top of the PC board towards the valve until it snaps under the middle latch.
Weave the power and water meter wires into the holders and reconnect the motor, water meter, and power plugs.
The drive bracket must be removed to access the drive cap assembly and piston(s), or the drive gear cover. It is not
necessary to remove the PC board from the drive bracket to remove the drive bracket. To remove the drive bracket,
start by removing the plugs for the power source and the water meter. Unweave the wires from the side holders. Two
tabs on the top of the drive backplate hold the drive bracket in place. Simultaneously lift the two tabs and gently ease
the top of the drive bracket forward. The lower edge of the drive bracket has two notches that rest on the drive
backplate. Lift up and outward on the drive bracket to disengage the notches.
To reassemble, seat the bottom of the drive bracket so the notches are engaged at the bottom of the drive backplate.
Push the top of the drive bracket toward the two latches. The drive bracket may have to be lifted slightly to let the
threaded piston rod pass through the hole in the drive bracket. Maintain a slight engaging force on top of the drive
bracket while deflecting the bracket slightly to the left by pressing on the side of the upper right corner. This helps the
drive gears mesh with the drive cap assembly. The drive bracket is properly seated when it snaps under the latches
on the drive backplate. If resistance is felt before latching, then the notches are not fully engaged; the piston rod is
not in the hole; the wires are jammed between the drive bracket and drive backplate; or the gear is not engaging the
drive cap assembly.
To inspect the drive gears, the drive gear cover needs to be removed. Before trying to remove the gear cover, the
drive bracket must be removed from the drive backplate. (Refer to the instructions above regarding the removal of
the drive bracket from the drive backplate. The drive gear cover can be removed from the drive bracket without
removing the motor or the PC board.) The drive gear cover is held in place on the drive bracket by three clips. The
largest of the three clips is always orientated to the bottom of the drive bracket. With the PC board facing up, push in
and down on the large clip on the drive gear cover. Handle the cover and the gears carefully so that the gears do not
fall off of the pegs in the cover.
Replace broken or damaged drive gears. Do not lubricate any of the gears. Avoid getting any foreign matter on the
reflective coating because dirt or oils may interfere with pulse counting.
The drive gear cover only fits one way—with the large clip orientated towards the bottom. If all three clips are outside
of the gear shroud on the drive bracket, the drive gear cover slips easily into place.
Page 14

The drive bracket does not need to be removed from the drive plate if the motor needs to be removed. To remove
the motor, disconnect the power and motor plugs from the jacks on the PC board. Move the spring clip loop to the
right and hold. Rotate the motor at least one quarter of a turn in either direction so the wires are vertical (up & down)
before gently pulling on the wire connectors to remove the motor. Pulling directly on the wires without rotating the
motor may break the wires off the motor.
Replace the motor if necessary. Do not lubricate the motor or the gears. To reinstall the motor, move the spring clip
loop to the right and hold. Gently turn the motor while inserting so that the gear on the motor meshes with the gears
underthedrivegearcover.Releasethespringcliploopandcontinuetorotatethemotoruntilthewiresarehorizontal
and the motor housing engages the small plastic bulge inside the drive bracket motor retainer. Reconnect the motor
plug to the two-pronged jack on the lower left-hand side of the PC board. If the motor will not easily engage with the
drive gears when reinstalling, lift and slightly rotate the motor before reinserting. Reconnect the power plug.
Replace the valve cover. After completing any valve maintenance involving the drive assembly or the drive cap
assembly and pistons, unplug the power source jack from the printed circuit board (black wire) and plug back in, or:
1. For valves that use a Tech-TC circuit board (three buttons), press and hold SET and DOWN buttons for
three seconds. (The cover button may have other names like SET HOUR, CLOCK, or SET CLOCK, but the
circuit board is labeled with SET.)
2. For all other Tech Series valves, press and hold NEXT and REGEN buttons for three seconds.
This resets the electronics and establishes the service piston position. The display should flash all wording, then
flash the software version, and then reset the valve to the service position.
Drive Cap Assembly, Main Piston, and Regenerant Piston
The drive assembly must be removed to access the drive cap assembly. The drive cap assembly must be removed
to access the piston(s). The drive cap assembly is threaded into the control valve body and seals with an o-ring. To
remove the drive cap assembly, use the special plastic wrench or insert a 1/4 inch to 1/2 inch flat blade screwdriver
into one of the slots around the top 2 inches of the drive cap assembly so it engages the notches molded into the
drive backplate around the top 2 inches of the piston cavity. (See Figure 5 below.) The notches are visible through
the holes. Lever the screwdriver so the drive cap assembly turns counterclockwise. Once loosened, unscrew the
drive cap assembly by hand and pull straight out.
Figure 5
The drive cap assembly contains the drive cap, the main drive gear, drive cap spline, piston rod, and various other
parts that should not be disassembled in the field. The only replaceable part on the drive cap assembly is the o-ring.
Attached to the drive cap assembly is the main piston (downflow or upflow), and if a regenerant is used, a
regenerant piston. Upflow is not applicable to Tech-TC Series control valves.
Page 15

The regenerant piston (the small diameter piston behind the main piston) is removed from the main piston by
pressing sideways and unsnapping it from its latch. Chemically clean in dilute sodium bisulfite or vinegar, or replace
the regenerant piston if needed. To remove the main piston, fully extend the piston rod and then unsnap the main
piston from its latch by pressing on the side with the number. Chemically clean in dilute sodium bisulfite or vinegar, or
replace the main piston.
Reattach the main piston to the drive cap assembly. Reattach the regenerant piston (if needed) to the main piston.
Reinsert the drive cap assembly and piston(s) into the spacer stack assembly and hand tighten the drive cap
assembly. Continue to tighten the drive cap assembly using a screwdriver as a ratchet until the black o-ring on the
spacer stack assembly is no longer visible through the drain port. Excessive force can break the notches molded into
the drive backplate. Make certain that the main drive gear still turns freely. The exact position of the piston(s) is not
important as long as the main drive gear turns freely.
Reattach the drive assembly to the control valve and connect all plugs. After completing any valve maintenance
involving the drive assembly or the drive cap assembly and piston(s), unplug the power source jack from the printed
circuit board (black wire) and plug back in, or:
1. For valves that use a Tech-TC circuit board (three buttons), press and hold SET and DOWN buttons for
3 seconds. (The cover button may have other names like SET HOUR, CLOCK, or SET CLOCK, but the circuit
board is labeled with SET.)
2. For all other Tech Series valves, press and hold NEXT and REGEN buttons for 3 seconds.
This resets the electronics and establishes the service piston position. The display should flash all wording, then
flash the software version, and then reset the valve to the service position.
NOTE: Refer to WS1 & WS1.25 Identification (page 46) to identify the main piston (not applicable for control valves
that use a quick connect tank adapter).
Spacer Stack Assembly
NOTE: Refer to WS1 & WS1.25 Identification (page 46) to identify the spacer stack (not applicable for control valves
that use a quick connect tank adapter).
To access the spacer stack assembly, remove the drive assembly, drive cap assembly and piston(s). The spacer
stack assembly can be removed easily without tools by using a thumb and forefinger. Inspect the black o-rings and
clear lip seals for wear or damage. Replace the entire stack if necessary. Do not disassemble the stack.
The spacer stack assembly may be chemically cleaned (dilute sodium bisulfite or vinegar) or wiped with a soft cloth.
The spacer stack assembly can be pushed into the control valve body bore by hand. Since the spacer stack
assembly can be compressed, it is easier to use a blunt object (5/8 inch to 1-1/8 inch in diameter) to push the center
of the assembly into the control valve body. The assembly is properly seated when at least four threads are exposed
(approximately 5/8 inch). Do not force the spacer stack assembly into position. The control valve body bore interior
can be lubricated with silicone to allow for easy insertion of the entire stack.
Reattach the drive cap assembly and piston(s), and the drive assembly.
After completing any valve maintenance involving the drive assembly or the drive cap assembly and pistons, unplug
the power source jack from the printed circuit board (black wire) and plug back in, or:
1. For valves that use a Tech-TC circuit board (three buttons), press and hold SET and DOWN buttons for
three seconds. (The cover button may have other names like SET HOUR, CLOCK, or SET CLOCK, but the
circuit board is labeled with SET.)
2. For all other Tech Series valves, press and hold NEXT and REGEN buttons for 3 seconds.
This resets the electronics and establishes the service piston position. The display should flash all wording, then
flash the software version, and then reset the valve to the service position.
Page 16

Table 5.
Valve Body Compliance Table
* QC1 and QC2 bodies are only available if referenced in the programming guide for that software.
Injector Cap, Screen, Injector Plug, and Injector
Unscrew the injector cap and lift off. Loosen the cap with a special plastic wrench or pliers if necessary. Attached to
the injector cap is a screen. Remove the screen and clean if fouled.
The plug and/or injector can be pried out with a small screwdriver. The plug can be wiped clean. If the plug leaks,
replacetheentireplug.Theinjectorconsistsofathroatandanozzle.Chemicallycleantheinjectorwithvinegaror
sodium bisulfite. The holes can be blown out with air. Both pieces have small diameter holes that control the flow
rates of water to insure that the proper concentration of regenerant is used. Sharp objects, which can score the
plastic, should not be used to clean the injector. Scoring the injector or increasing the diameter of the hole could
change the operating parameters of the injector.
NOTE: Two holes are labeled DN and UP. Check for compliance. (See Table 5 above.)
Push the plug(s) and/or injectors firmly in place, replace the screen, and hand tighten the injector cap.
Page 17
Application Injector and/or Plug(s) Main
Piston
Regenerant
Piston Stack Body *
1inchDownowSoftener
or Regenerating Filter
Injector in DN hole,
Plug in UP hole LC-V3011 LC-V3174 LC-V3005-02
LC-V3001
LC-V3001-01 (QC1)
LC-V3001-02 (Mixing)
LC-V3001-04 (QC2)
LC-V3001-06 (Mixing QC2)
1 inch Backwash Only Filter Plug in DN & UP holes,
InstallRellPortPlug LC-V3011 None LC-V3005-02
LC-V3001
LC-V3001-01 (QC1)
LC-V3001-02 (Mixing)
LC-V3001-04 (QC2)
LC-V3001-06 (Mixing QC2)
1inchUpowSoftener Injector in UP hole,
Plug in unlabeled hole LC-V3011-01 LC-V3174 LC-V3005-02
LC-V3001UP
LC-V3001-01UP (QC1)
LC-V3001-02UP (Mixing)
LC-V3001-04UP (QC2)
LC-V3001-06UP (Mixing QC2)
1.25inchDownow
Softener or Regenerating
Filter (1.32 inch Distributor)
Injector in DN hole,
Plug in UP hole LC-V3407 LC-V3174 LC-V3430-01 LC-V3020 LC-V3020-01 (Mixing)
1.25 inch Backwash Only
Filter (1.32 inch Distributor)
Injector in DN hole,
Plug in UP hole LC-V3407 None LC-V3430-01 LC-V3020 LC-V3020-01 (Mixing)
1.25inchDownow
Softener or Regenerating
Filter (32 mm Distributor)
Plug in DN & UP holes,
InstallRellPortPlug LC-V3407 LC-V3174 LC-V3430-01 LC-V3020-02 LC-V3020-03 (Mixing)
1.25 inch Backwash Only
Filter (32 mm Distributor)
Plug in DN & UP holes,
InstallRellPortPlug LC-V3407 None LC-V3430-01 LC-V3020-02 LC-V3020-03 (Mixing)
1.25inchUpow
(1.32 inch Distributor)
Injector in UP hole,
Plug in unlabeled hole LC-V4042 LC-V3174 LC-V3430-01 LC-V3020UP
1.25inchUpow
(32 mm Distributor)
Injector in UP hole,
Plug in unlabeled hole LC-V4042 LC-V3174 LC-V3430-01 LC-V3020-02UP LC-V3020-03UP (Mixing)

Refill Flow Control Assembly or Refill Port Plug
To clean or replace the refill flow control, pull out the elbow locking clip and then pull straight up on the elbow.
Replace the elbow locking clip in the slot so that it is not misplaced. Twist to remove the white flow control retainer.
The flow control can be removed by prying upward through the side slots of the retainer with a small flat blade
screwdriver.
Chemically clean the flow control or the white flow control retainer using dilute sodium bisulfite or vinegar. Do not use
a wire brush. If necessary, replace the flow control, o-ring on the flow control retainer, or the o-ring on the elbow.
Reseat the flow control so the rounded end is visible in the flow control. Reseat the white flow control retainer by
pushing the retainer into the elbow until the o-ring seats. Remove the locking clip, push down on the elbow to reseat,
and insert the locking clip.
Do not use Vaseline, oils, or other unacceptable lubricants on o-rings. A silicone lubricant may be used on the o-ring
on the elbow or the white retainer.
Water Meter or Meter Plug
The water meter assembly is connected to the PC board by a wire. If the entire water meter assembly is to be
replaced, remove the control valve cover, and disconnect the power source and water meter plugs from the PC
board. Unlatch the drive assembly and lean it forward. Unthread the water meter wire from the side of the drive
assembly and through the drive backplate. To reinstall, rethread the water meter wire through the drive backplate and
the side of the drive assembly. Reattach the drive assembly, the water meter, and power plugs.
NOTE: This water meter should not be used as the primary monitoring device for critical or health effect
applications.
Operating Pressure: 20 psi minimum / 125 psi maximum
Operating Temperature: 40°F minimum / 110°F maximum
If no water meter wire is visible, then a plug is installed, not a water meter.
The water meter wire does not need to be removed from the PC board if the water meter is only being inspected and
cleaned. To remove the water meter assembly, unscrew the meter cap on the left side of the control valve. Pliers
may be used to unscrew the nut if necessary.
With the nut removed, a slot at the top of the water meter is visible. Twist a flat blade screwdriver in the slot between
the control valve body and the meter. When the meter is part way out, it is easy to remove the water meter from the
housing. Once the water meter is removed from the control valve body, gently pull forward on the turbine to remove it
from the shaft.
Do not use a wire brush to clean the turbine. Wipe with a clean cloth or chemically clean in dilute sodium bisulfite or
vinegar. The turbine can be immersed in the chemical. Do not immerse electronics. If the turbine is scored or
damaged or the bearings on the turbine are worn, replace the turbine.
Do not lubricate the turbine shaft. The turbine shaft bearings are prelubricated. Do not use Vaseline, oils, or other
unacceptable lubricants on the o-ring. A silicone lubricant may be used on the black o-ring.
Snap the turbine on the shaft and reinsert the water meter into the side slot. Hand tighten the nut. Do not use a pipe
wrench to tighten the nut.
Page 18

Mixing Valve
To clean or replace the mixing valve, unthread the mixing valve from the valve body. Chemically clean the mixing
valve with a dilute sodium bisulfite or vinegar solution. Do not use Vaseline, oils, or other unacceptable lubricants on
o-rings. A silicone lubricant may be used on the o-ring. Before replacing the mixing valve in the valve body, turn the
knob clockwise so that the mixing valve is in the open position. Failure to do this may cause damage to the mixing
valve when it is screwed into the valve body.
To adjust the blended water, close the mixing valve. Open a water faucet to the desired flow rate. Open the mixing
valve until the desired hardness is reached. Close the faucet.
Bypass Valve
The working parts of the bypass valve are the rotor assemblies that are contained under the bypass valve caps.
Beforeworkingontherotors,makesurethesystemisdepressurized.Turntheredarrowshapedhandlestowards
the center of the bypass valve and back several times to ensure rotor is turning freely.
The nuts and caps are designed to be unscrewed or tightened by hand. If necessary, a pliers can be used to
unscrew the nut or cap. Do not use a pipe wrench to tighten or loosen the nuts or caps. Do not place a screwdriver
in the slots on the caps and/or tap with a hammer. To access the rotor, unscrew the cap and lift out the cap, rotor,
and handle as one unit. Twisting the unit as you pull it out will help to remove it more easily. There are three o-rings:
one under the rotor cap, one on the rotor stem, and the rotor seal. Replace worn o-rings. Clean the rotor. Reinstall
the rotor.
When reinstalling the red arrow handles be sure that:
1. The handle pointers are lined up with the control valve body arrows, and the rotor seal o-ring and retainer on
both rotors face to the right when being viewed from the front of the control valve; or
2. The arrows are pointing toward each other in the bypass position.
Since the handles are removable, they could be accidentally reinstalled 180 degrees from their correct orientation. To
install the red arrow handles correctly, keep the handles pointed in the same direction as the arrows engraved on the
control valve body while tightening the bypass valve caps.
After completing any valve maintenance involving the drive assembly, or the drive cap assembly and piston(s),
unplug the power source jack from the printed circuit board (black wire) and plug back in, or:
1. For valves that use a Tech-TC circuit board (three buttons), press and hold SET and DOWN buttons for
3 seconds. (The cover button may have other names like SET HOUR, CLOCK, or SET CLOCK, but the circuit
board is labeled with SET.)
2. For all other Tech Series valves, press and hold NEXT and REGEN buttons for 3 seconds.
This resets the electronics and establishes the service piston position. The display should flash all wording, then
flash the software version, and then reset the valve to the service position.
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