Neo-Pure RO-4300Rx-DLX Setup guide

The High Efficiency Reverse Osmosis
Drinking Water System Installation,
Operation And Service Manual.
+-DLX

1
Important Notices: This reverse osmosis system contains replaceable treatment components critical for effective performance. It is the user’s responsibility to,
and the manufacturer strongly recommends that the user, periodically test the product water to verify the system is performing satisfactorily. See the test kit(s)
for sampling instructions. This system is acceptable for treatment of influent concentrations of no more than 27 mg/L nitrate and 3 mg/L nitrite in combination
measured as N and is certified for nitrate/nitrite reduction only for water supplies with a pressure of 280 kPa (40 psig) or greater.
This system conforms to NSF/ANSI Standard 58 for pentavalent arsenic reduction. See the Performance Data Sheet and Arsenic Facts section for an explanation
of reduction performance.
DO NOT USE WITH WATER THAT IS MICROBIOLOGICALLY UNSAFE OR OF UNKNOWN QUALITY, WITHOUT ADEQUATE DISINFECTION BEFORE OR AFTER THE SYSTEM.
Systems certified for cyst reduction may be used on disinfected water that may contain filterable cysts.
TABLE OF CONTENTS
Section I. Introduction.....................................................................................2
Section II. Specifications..................................................................................5
Section III. Preparation......................................................................................6
A. Major System Components.............................................................6
B. Tools Recommended For Installation..............................................6
C. Site Selection For Major System Components.................................7
Section IV. Installation Steps............................................................................8
A. Faucet Installation.........................................................................9
B. Drilling A Stainless Steel Sink........................................................9
C. Drilling A Porcelain Or Cast Iron Sink..............................................9
D. Prepare the R.O. Air Gap Faucet, Feed Water Supply Hose
And Drain Clamp Assemblies..........................................................9
E. Position the Drinking Water Holding Tank
And Final Connections.................................................................12
F. Start Up.......................................................................................13
Section V. Operation And Maintenance..........................................................14
A. Normal Operation........................................................................14
B. Changing Filters..........................................................................15
C. Changing The In–Line Activated Carbon Post-Filter........................15
Section VI. Deluxe Component Installation......................................................16
Section VII. Trouble Shooting Guide.................................................................17
Exploded View And Parts List..................................................................................................19
NeoLogic Filtration Products Limited Warranty......................................................................21

Your new Reverse Osmosis (R.O.) Drinking Water System uses a combination of filtration technologies to reduce unwanted
contaminants in a water supply. The following steps combine to give you the best in clear sparkling drinking water:
MECHANICAL FILTRATION ACTIVATED CARBON
The sediment Pre-Filter has been designed to help reduce
the larger particles such as silt, rust and scale. Its 5
micron (equal to 0.0002 inch) nominal rating helps to give
maximum life to the R.O. Membrane. The activated carbon
in the Pre-Filter has been designed to reduce any chlorine
that may be present in the feed water. This pretreatment
is also necessary for membrane protection.
REVERSE OSMOSIS MEMBRANE
The R.O. Membrane is the heart of the filtration system.
It is designed to reduce the dissolved mineral content
of the water. Minerals picked up in the environment by
the water are measured as Total Dissolved Solids (TDS).
In the Reverse Osmosis process, dissolved minerals are
separated from the incoming water (Feed Water) to produce
the product water (the Permeate). The excess minerals are
rinsed to drain (the Reject Water).
The membrane is a specially constructed, fully aromatic
polyamide film and is classified as a Thin Film Composite
(T.F.C.).
The spiral wound construction of the R.O. Membrane
provides maximum surface area for water production
and is less susceptible to fouling by particulate matter,
turbidity and colloidal materials.
ACTIVATED CARBON
The Activated Carbon Post-Filter contains carbon
particles with a vast network of pores. The tremendous
surface area of these pores (typically 800–1200 square
meters per gram of carbon) gives the carbon very good
adsorptive sites for substances that contribute to tastes
and odors.
IN–LINE ACTIVATED CARBON POST-FILTER
The In–Line Activated Carbon Post-Filter is located after
the Holding Tank and has been designed to reduce the
tastes and odors that may pass through the system.
It adds a final polish to the water.
AUTOMATIC SHUT-OFF VALVE
The ASO Valve senses when the Holding Tank is full and
closes the feed water supply to prevent excess reject water
from going to drain when the unit is not producing water.
WATER QUALITY MONITOR
The optional Water Quality Monitor has been integrated
into the system cover for instant monitoring at the touch
of a button. The monitor compares the level of the total
dissolved solids in the incoming (feed) water versus
the product water and calculates the percent rejection.
The monitor is preset to indicate a level of 75% rejection.
NSF/ANSI Standard 58 requires a 75% total dissolved
solids rejection to pass the requirement of the standard.
A green light indicates that the percent rejection is at
or above the set (desired) value and that the system is
producing quality water.
An amber light indicates that the product water quality is
less than acceptable. Because the Water Quality Monitor
was designed to operate best while the system is making
water, a false reading may occur if tested when your R.O.
drinking water system is not making water. Please empty
the Holding Tank, wait 15 minutes for the system to begin
making water, and test your water quality again. If the
Water Quality Monitor light is still amber, please contact a
water treatment professional for service. The Water Quality
Monitor requires a 9 volt battery, which is included. Systems
not equipped with a Water Quality Monitor contain a Water
Quality Test Kit.
SECTION I. INTRODUCTION
2
From top
products to our
dedicated customer
service and support,
we know what’s
important to you.

SECTION I. INTRODUCTION
TYPICAL RO-4300RX UNDER SINK INSTALLATION DIAGRAM (FIGURE 1)
3
1
2
510
3
4
Dispensing
Faucet With
Air Gap
Drain
Clamp
In-Line
Activated
Carbon
Post-Filter Permeate Pump
(Deluxe Model)
Alkaline (Deluxe Model)
Cover
RO Manifold
Drain
(1/4" Black)
Inlet
(1/4" Orange)
(1/4" White)
Product
(3/8" Blue)
6
7
8
Polytube
Tee
Stage 3
Carbon
Post-Filter
Housing
Stage 2
Reverse
Osmosis
Membrane
Housing
Stage 1
Sediment
Carbon
Pre-Filter
Housing
Locate Drain Clamp
Above "P" Trap
Feed Water Valve
(Cold Water Line Only)
Drinking Water
Holding Tank
Holding Tank
Shut-Off Valve
(Open Position)
Drain
(3/8" Black)
Tank
(3/8" White)
9
11
Permeate Pump Connection Guide
RO Water
(Permeate)
RO Water
Out To Tank
Drain
(Brine Out)
Drain In
In
Drain
Orange
Black
White
Drain Restrictor
Out
Tube Connection Guide

Dispensing
Faucet
Product
(3/8")
NOTE: For refrigerator water
dispenser or ice maker hookup,
Tee into 3/8" blue tubing to
dispensing faucet.
Holding Tank Shut-Off Valve
(Open Position)
Floor
Polytube Tee
(3/8" x 1/4"
Black)
In-Line Activated
Carbon Post-Filter
Feed Water
Saddle Valve
(Cold Water Line
Only Not Included)
Tank
(3/8" White)
For cover with optional water quality monitor
see exploded view at the end of this manual.
Cover
RO Manifold
Drinking
Water Holding
Tank
Mount Holding Tank
On Shelf Or Strap Between
Floor Joists
(Shelf or straps not included)
Stage 3
Activated
Carbon
Post-Filter
Housing
Stage 2
Reverse
Osmosis
Membrane
Housing
Stage 1
Sediment
Carbon
Pre-Filter
Housing
Drain
(1/4" Black)
Feed
(1/4" Orange)
(Blue)
(Blue)
(White)
1" Air Gap Required
Basement
Floor
PLEASE NOTE: If Air Gap in faucet is not used in
basement installations, a proper Air Gap must be
created. Please check with local plumbing codes.
See example above.
4
SECTION I. INTRODUCTION
OPTIONAL RO-4300RX BASEMENT INSTALLATION DIAGRAM (FIGURE 2)

Because the performance of an R.O. Membrane is highly dependent upon pressure, temperature, pH and TDS, the following
should be used for comparison purposes only.
SECTION II. SPECIFICATIONS
Performance U.S. Metric
Membrane Production141-53 gpd 155-201 lpd
Membrane TDS Reduction196% Minimum 96% Minimum
System Production² 14 gpd 53 lpd
Recovery Rating² 38% 38%
Efficiency Rating² 22% 22%
TDS Reduction² 90%+ Typical 90%+ Typical
Drain (Reject Water) Flow 3–5 x product Flow Metric
Empty Storage Tank Precharge 5–7 psig Air 35–48 kPa Air
Performance 1.8 Gallons 6.8 Liters
TABLE A (QUALIFIED PERFORMANCE)
1 Industry standards measure R.O. Membranes performance with no back pressure on the product water, at 65 psig (448kPa) and 77°F (25°C). Further conditions on the above are 250 ppm TDS. Production
rate and TDS reduction figures are for a new Membrane that has been rinsed for 24 hours. The production rate of a new Membrane can decrease by 10% per year or more, depending upon the scaling and
fouling tendencies of the Feed Water.
2 Measured at 50 psig, 77°±2° F, 750±40 mg/l TDS per section 6 of NSF/ANSI Standard 58. Recovery rating means the percentage of the influent water to the membrane portion of the system that is
available to the user as reverse osmosis treated water when the system is operated without a storage tank or when the storage tank is bypassed. Efficiency rating means the percentage of the influent water
to the system that is available to the user as reverse osmosis treated water under operating conditions that approximate typical daily usage. This reverse osmosis system contains a replaceable component
critical to the efficiency of the system. Replacement of the reverse osmosis component should be with one of identical specifications, as defined by the manufacturer, to assure the same efficiency and
contaminant reduction performance.
Specifications RO-4300RX Membrane
Water Pressure 40–100 psig (280–690 kPa)
TDS 2000 ppm (also mg/l) max.
Temperature 40–100°F (4–38°C)
pH 4–11 (Optimum Rejection At pH 7.0 - 7.5)
Hardness Less Than 10 gpg (170 mg/l) Or Soften
Iron Less Than 0.1 ppm (Also mg/l)
Manganese Less Than 0.05 ppm (Also mg/l)
Hydrogen Sulfide None
Chlorine See Note
Bacteria Must Be Potable**
TABLE B (RECOMMENDED OPERATING LIMITS FOR FEED WATER)
NOTE: If Chlorine will damage a T.F.C. Membrane. The Sediment/Carbon Pre-Filter has been designed to reduce chlorine from the incoming
water. Change filter every 6 months, more often if the water contains more than 1 ppm chlorine.
**DO NOT USE WITH WATER THAT IS MICROBIOLOGICALLY UNSAFE OR OF UNKNOWN QUALITY, WITHOUT ADEQUATE DISINFECTION BEFORE
OR AFTER THE SYSTEM.
5

A. MAJOR SYSTEM COMPONENTS
The following components comprise the R.O. Drinking Water System. (Refer to Fig. 1 for general system layout.)
SECTION III. PREPARATION
• An R.O. Manifold assembly.
• Housings and Housing O–rings.
• A Drinking Water Holding Tank.
• A Dispensing Faucet.
• A Feed Water Adapter Valve.
• A Drain Clamp.
• Plastic Tubing and tube connectors.
• A Reverse Osmosis Membrane sealed in a plastic bag.
• A Sediment/Carbon Pre-Filter, shrink wrapped.
• An Activated Carbon Post-Filter, shrink wrapped.
• R.O. System Cover with or without optional Water Quality Monitor.
• Other items necessary for installation but not included with basic installation kit, may include wood screws
or machine screws and nuts for mounting the manifold, or concrete anchors for hanging on basement wall.
Additional tubing or tube connectors. Plastic wire ties for organizing tubing.
B. TOOLS RECOMMENDED FOR INSTALLATION
The following tools will cover most of the installation sites encountered:
Mounting Faucet:
1. 3/8" variable speed electric drill.
2. 1¼" porcelain hole cutter kit.
3. 1¼" Greenlee hole punch and 1/8"
and ½" metal drill bits for pilot hole.
4. Center punch and hammer.
5. 1¼" wood bit.
6. Safety glasses.
7. Basin wrench or 10" pipe wrench.
8. Wide masking tape or duct tape.
Assembling R.O. System:
9. Phillips head and flat blade screwdrivers.
10. ½", 9/16" and 5/8" open end wrenches.
11. Teflon tape.
12. Plastic tubing cutter.
13. Extra plastic tubing.
14. Low range air pressure gauge.
15. Bicycle hand air pump.
16. Paper towels, wisk broom and
assorted clean up materials.
6

C. SITE SELECTION FOR MAJOR SYSTEM COMPONENTS
The R.O. System was designed to fit under a sink, however, because of space limitations or other reasons,
the system’s flexible design allows for other locations. When determining the location remember that access
to a cold water tap line, the household drain, and ease of filter replacement are important considerations.
All components and tubing should be located in an area which is not exposed to freezing temperatures.
If winter temperatures are severe, the area should be above the minimum temperature listed in
Table B, page 5 for proper performance. Do not expose unit or tubing to direct sunlight.
SECTION III. PREPARATION
7
1. Dispensing Faucet:
The faucet should be placed near the sink where drinking water is normally obtained.
Convenience of use (filling of water pitchers and glasses), and an open area beneath
the faucet under the sink for attaching product and drain tubing are considerations.
4. Feed Water Connection:
The Feed Water Valve should be located as close to the manifold assembly as possible.
USE A POTABLE COLD WATER SUPPLY ONLY. Softened water is preferred as it will extend
the life of the R.O. Membrane.
3. R.O. Manifold Assembly:
The manifold can be installed on either the right or left side of the under–sink area
or a cabinet. The right side is recommended because all the tubing will be to the back
of the cabinet and out of the way.
Installation in the basement is also an option, one location is near the laundry/utility sink
where cold potable water and drain access is handy. The mounting location should allow
adequate clearance and accessibility for cartridge changes.
2. Drinking Water Holding Tank:
The Holding Tank may be placed where it is convenient within 10 feet of the faucet;
under the sink or in an adjacent cabinet are the best choices. If a longer run of tubing
is required, the tubing 7 should be the 3/8" diameter OD size to prevent a high pressure
drop. Remember, these tanks can weigh up to 30 pounds when full of water; a firm,
level area is required.
5. Drain Connection:
The waste water must go to drain through an anti–siphon air gap. The air gap is provided for in the
base of the faucet. If discharging into a utility sink or standpipe, an air gap of greater than 1" above
the flood rim must be provided. Do NOT connect the system drain line to the dishwasher drain or
near the garbage disposal. Back-pressure from these units may cause the air gap to overflow.

SECTION IV. INSTALLATION STEPS
8
Faucet Base
Washer, Metal
Drinking Water Line
From Post-Filter To Faucet
(3/8" Blue Tubing)
Body
Faucet
Spacer
Nut, Faucet
Washer, Faucet
Air Gap
Faucet Base
Washer, Rubber
Connector, Faucet
(3/8" x 7/16")
Drain Line From
Air Gap To Drain
(3/8" Black Tubing)
Drain Line
To Air Gap
(1/4" Black Tubing)
AIR GAP ONLY
GRINDING WHEEL
Sink Top
Metal
Porcelain
CAUTION: Be careful when the drill
is about to penetrate the base metal of
the sink. Reduce the speed and support the
drill so the drill chuck does not impact
the porcelain or enamel.
FAUCET DIAGRAM (FIGURE 3)

SECTION IV. INSTALLATION STEPS
9
A. INSTALL THE FAUCET ASSEMBLY
The most convenient installation would allow the use of an existing spray attachment hole.
If the spray attachment hole is not available, then follow the basic procedures outlined below.
C. DRILLING A PORCELAIN CLAD STEEL OR CAST IRON SINK
1. Mark the sink location for the center of the faucet. Be sure the location you select is not over a reinforcing rib.
Check the location from below.
2. Grind away a 1-1/4" diameter circle in the porcelain using a silicon/carbide wheel and high-speed grinder,
down to the metal surface of the sink. (See Grinding Wheel).
3. Impact punch a small indent in the center of the area ground away.
4. Drill a 1/4" pilot hole through the metal base using a standard high-speed drill bit.
5. Use the pilot hole as a guide to drill a minimum 1" up to a 1-1/4" diameter hole with carbide bits to mount the
R.O. air gap faucet.
B. DRILLING A STAINLESS STEEL SINK
1. Mark the sink location for the center of the faucet.
2. Impact punch the sink top to provide a starting point for the drill bit.
3. Drill a 1/4" pilot hole in the sink using a high-speed drill bit.
4. Drill a 1/2" diameter hole to accept the bolt of a 1-1/4" Greenlee Chassis Punch.
5. Set the punch and turn the nut with a wrench to cut the hole.
D. PREPARE THE R.O. AIR GAP FAUCET ASSEMBLY FOR INSTALLATION
1. Using the diagram in Figure 3, assemble the Air Gap Spigot with all the components except the slot washer.
Begin with the escutcheon, followed by the rubber gasket, spacer, flat washer, 9/16" nut, and 3/8" spigot adapter.
2. Using the diagram in Figure 2, from under the sink, feed the pre-connected 1/4" black tube and the pre-connected
3/8" blue tube from the R.O. assembly through the hole in the sink. Slip the blue tube into the spigot adapter, and
replace the red locking clip. Slip the 1/4" black tube onto the small hose barb on the base of the spigot.
Installation Tip: To make it easier to slip the tubing over the hose barbs, soak the black tube ends in hot water to soften
the tubing. The tubing will slip onto the hose barbs much more easily, and will conform better as it cools and reduce the
possibility of splitting.
3. Feed the assembled spigot and tubing through the hole in the sink and let the spigot rest on the rubber gasket and
escutcheon.
4. Drill a 1/4" pilot hole through the metal base using a standard high-speed drill bit.
5. From under the sink, slip the slot washer between the sink and the spacer and finger-tighten
the 9/16" nut until snug.
6. Position the spigot for customer convenience and then use a 9/16" wrench to tighten the nut
to secure the spigot on the sink.

SECTION IV. INSTALLATION STEPS
CORRECT
HOSE POSITIONS HOSE DIAGRAM (FIGURE 4)
10
D. INSTALL THE FEED WATER SUPPLY VALVE
7. Shut off the water at the angle stop valve.
8. Use a 5/8" open-end wrench to loosen the
compression nut on the angle stop riser tube.
9. Install the Feed Water Supply valve onto
the angle stop. Use the 5/8" wrench to tighten
the compression nut on the feed water supply
valve. Do not over-tighten!
10. Reconnect the riser tube to the other
end of the feed water supply valve.
Do not over-tighten!
11. Fully insert the red 1/4" tube into the
speed-fit connection and replace the red
locking clip. The new feed water valve can
be swiveled to position the tubing out of the
way of under sink items.
12. Make sure the feed water supply valve is
off before turning the angle stop valve on.
Check for leaks
INCORRECT
CAUTION: A longer riser tube
assembly will be required if a gentle
loop cannot be made.

SECTION IV. INSTALLATION STEPS
3/8" DRAIN CLAMP ASSEMBLY (FIGURE 5)
D. Drain Clamp Installation: Choose the drain outlet
location per Sec. III. The following are instructions
for discharging into the sink drain pipe. (Refer to Fig. 5.)
13. Position the Drain Clamp on the sink drain pipe above
the drain trap. Allow room for drilling. Tighten securely.
14. Use a battery powered or properly grounded drill.
Using the Clamp port as a drill guide, drill a 7/32" hole
through the wall of the drain pipe. Do NOT penetrate the
opposite side of the pipe.
15. Locate the 3/8" Black Drain Tubing connected to the
Dispensing Faucet. Route the tubing to the Drain Clamp
and trim to length.
NOTE: When cutting the polytubing make clean, square
cuts, failing to do so could result in poor connections and
possible leaks.
CAUTION: The lowest point of the line should be the point
of connection to the Drain Clamp. There should be no sag
in the line as this may cause excessive noise as the reject
water is flowing to drain
• Insert the tubing into the Drain Clamp. Make sure
the tubing is pressed all the way in to create a
pressure-tight connection. (Refer to Fig. 5.)
• If you want to pull the tubing out for some reason,
push the ring around the tubing in and pull the
tubing out.
11
Sink
Do Not
Install Here
Install
Here
Maximum
Displacement
From Top
Center - 45°
Drain Line
From Air Gap
(Air Gap Only)
Vertical
Mount
Horizontal
Mount
Sink

D. R.O. MANIFOLD ASSEMBLY INSTRUCTIONS
Locate the site per Sec. III, C.3. Various installation sites will require different types of mounting fasteners; be sure the fastener
selected will provide a firm, solid mounting. A support panel may be necessary on thin cabinet walls or to span between wall studs
on particleboard or drywall.
Do not drill through exterior cabinet walls or leave sharp wood screw points exposed in readily accessible cabinet interiors.
The close proximity of a dishwasher or a trash compactor may require special fabrication of a mounting plate.
SECTION IV. INSTALLATION STEPS
16. The mounting bracket will accept either #10 or #12
(5mm) mounting screws spaced on 6" (15 cm) centers.
Allow at least 4" (10 cm) of clearance beneath the filter
housings to accommodate filter changes. Mark the
two locations (the bracket can be used as a template).
Install the screws and tighten them until the heads are
about 5/8" from the wall.
17. Locate the ¼" Orange Feed Water Tubing. Remove
the red plug from the fitting labeled “In” on the manifold
and insert the tubing. Reference the special supplement
sheet in the carton for proper connection of all tubing
and removal of plugs. Run the tubing along its course
to the Feed Water Valve, trim to length. (Refer to Fig. 1.)
18. Locate the ¼" Black Drain Tubing. Remove the black
plug from the fitting labeled “Drain” on the manifold
and insert the tubing. The end of the Black Drain
Tubing that should be inserted into the “Drain” port
will have a drain restrictor in it. Run the tubing along
its course to the ¼" Hose Barb on the Dispensing
Faucet, trim to length and connect by firmly pressing
over the barb. Allow the tubing to relax, then press
firmly again to insure proper seating.
19. Locate the ¼" White tubing. Remove the yellow plug
from the fitting labeled "Out" on the manifold and
insert the tubing.
20. Locate the 3/8" Blue Product Water Tubing.
Firmly press one end into the tee and the other
end into the faucet connector. (Refer to Fig. 3.)
The fittings will grab the tubing and seal it in place.
Make sure the tubing is pressed all the way in to
create a pressure tight connection.
NOTE: If you want to pull the tubing out for
some reason, push the ring around the tubing
in and pull the tubing out.
21. Hang the Manifold Assembly on the mounting screws
and tighten. DO NOT OVER-TIGHTEN.
22. Remove the wrapping from the In–Line Activated
Carbon Post-Filter. Slice the 3/8" Blue Polytube where
it would be convenient to install and change the In–
Line Filter. Make a clean straight cut to insure proper
connections. The “Out” port on the In–Line Filter should
be toward the faucet. Firmly press in the tubing. The
fittings will grab the tubing and seal it in place. Make
sure the tubing is pressed all the way in to create a
pressure tight connection.
E. POSITION THE DRINKING WATER
HOLDING TANK AND MAKE THE FINAL
HOSE CONNECTIONS.
1. Check the tank precharge pressure. Make sure it is
between 5 to 7 psig. If not, use a bicycle hand pump
or other pump to bring the pressure up to the 5 to 7
psig range.
2. Wrap Teflon tape three times around the ¼" male
outlet thread. Wrap in the direction of the threads
(clockwise when looking down on the Holding Tank).
The tape will act as a thread sealant. Screw on the
Holding Tank Shut–Off Valve.
3. Locate the 3/8" White Tubing. Firmly press one
end into the Holding Tank Shut–Off Valve and the
other end into the tee. (Refer to Fig. 1.) The fittings
will grab the tubing and seal it in place. Make sure
the tubing is pressed all the way in to create a
pressure tight connection.
12

F. START UP
At time of start up and each time the filters are changed the system should be sanitized (also see Operation
and Maintenance Sec. V).
SECTION IV. INSTALLATION STEPS
1. Sanitizing the system. Use a drip pan to aid clean–up.
NOTE: The system should be sanitized BEFORE installing
the Sediment/Carbon Pre-Filter, the Activated Carbon
Post-Filter or the R.O. Membrane.
• Use a good quality unscented 5¼% liquid chlorine
household bleach.
• Open the Dispensing Faucet and open the Holding
Tank Shut–Off Valve (the handle should be parallel
with the valve body).
• Remove the plug on the underside of the manifold
labeled “SEDIMENT/CARBON”. Pour one capful of
bleach (this is approximately 2 tsp. or 10 ml) into one
of the white Housings. Insert a Housing O–ring into the
Housing groove, (press firmly in place). Engage and
firmly tighten the Housing hand tight only.
• Remove the plugs labeled “MEMBRANE” and
“ACTIVATED CARBON” from the underside of the
manifold. To each of the remaining white Housings,
add one capful of bleach. Insert a Housing O–ring,
engage and firmly tighten the Housings hand
tight only.
• Slowly open the Feed Water Valve
(turning counter clockwise).
• As soon as the water begins to come out of
the Dispensing Faucet, close the Faucet.
• Let stand for 15 minutes.
NOTE: During this time, check the system
carefully for leaks.
• At the end of 15 minutes, CLOSE the Feed Water
Valve and open the Dispensing Faucet.
• Allow the Holding Tank to completely drain, then
remove the Sediment/Carbon Filter Housing (the
farthest of the three from the In–Out ports), empty,
and install the Sediment/Carbon Pre-Filter. Firmly
tighten the Housing hand tight only.
• Remove the Activated Carbon Filter Housing
(the closest of the three to the In–Out ports),
empty, and install the Activated Carbon Post-Filter.
Firmly tighten the Housing hand tight only.
2. Installing the R.O. Membrane:
• Remove the R.O. Membrane Housing,
(the middle one), and empty.
• Insert the Membrane up into the manifold.
(The O–rings should be up toward the manifold.)
Check the Housing O–ring for proper position in
its groove, engage and firmly tighten the Housing
hand tight only.
3. Installing the R.O. Membrane:
• Slowly open the Feed Water Valve fully
counter clockwise.
• The Holding Tank Valve should be open.
• Check the Air Gap Window on the Dispensing
Faucet to be sure that the drain water is flowing.
The R.O. System is now making water.
• Do not open the Faucet for at least 8 hours.
• Do not use the first three full tanks of water.
CAUTION: The R.O. Membrane is shipped with a
preservative in it. To ensure proper rinsing of the
R.O. Membrane it is important to wait at least 8
hours before emptying each tank.
When the Faucet is first opened, expect air
and carbon fines (very fine black powder) from
the In–Line and Activated Carbon Post-Filters to
be rinsed out. This is normal for the first tank of
water or after the Activated Carbon Post-Filters
are changed.
13

A. NORMAL OPERATION
SECTION V. OPERATION & MAINTENANCE
1. It is normal for the Total Dissolved Solids (TDS) of the water to be higher than normal during the first 5 gallons of operation;
this is due to the sanitizing solution and the new Post-Filters. After this water is rinsed to drain, the removal rate should stabilize
at a value of greater than 75%. The optional Water Quality Monitor measures the TDS reduction and gives an indication of
proper performance. Water pressure affects the production rate and quality.
2. R.O. Systems produce drinking water at relatively slow rates; it can take up to 5 hours or more to fill the Holding Tank.
Normal operation is to let the Holding Tank fill with water and then draw water as needed. When the pressure in the
Holding Tank falls to a given pressure (as the water is being used) the Automatic Shut–Off Valve (ASO Valve) will start
water production and the system will refill the Holding Tank. When the Holding Tank is full and no water is being used,
the ASO Valve will automatically shut off the feed water to conserve water. The more water that is used (up to the capacity
of the system) the better the R.O. System will function. Other uses for the water are flowers, pets and rinsing glassware.
With each use it is recommended that you run the faucet for at least 10 seconds prior to using water. This is especially
important if the system has not been used daily. After periods of non–use, such as a week of vacation, it is better to empty
the Holding Tank and allow the system to produce fresh water for use. If the system is not used for 3–4 weeks or longer,
it is a good idea to re-sanitize the system and to change the Pre-Filter and Post-Filters.
B. CHANGING FILTERS
THIS R.O. SYSTEM CONTAINS FILTERS WHICH MUST BE REPLACED AT REGULAR INTERVALS TO MAINTAIN PROPER
PERFORMANCE. USE ONLY FACTORY APPROVED FILTERS.
All individuals should take adequate precautions when changing the filters, including wearing protective gloves,
to avoid direct contact with the exhausted filters.
The recommended interval for changing the filters (not the R.O. Membrane) is every six (6) months. Typical T.F.C.
Membrane life expectancy is three years. Local conditions may dictate more frequent changes.
• Remove the Sediment/Carbon Filter Housing and empty. Remove the wrapping and install the Sediment/Carbon Pre-Filter.
Firmly tighten the Housing hand tight only.
• Remove the Activated Carbon Filter Housing and empty. Remove the wrapping and install the Activated Carbon Post-Filter.
Firmly tighten the Housing hand tight only.
• Disconnect the white product water tubing that runs from the Holding Tank to the Tee (see Fig. 1.). Put 50 drops of bleach
(this is ½ tsp. or 3 ml) into the tubing and reconnect it to the Tee.
NOTE: Now is the convenient time to change the In–Line Activated Carbon Post-Filter.
• Slowly open the Feed Water Valve. When water begins dripping out of the Dispensing Faucet,
in the following order, close the Faucet and then open the Holding Tank Valve.
• Do not open the Faucet for at least 8 hours.
• Discard the first three full tanks of water produced, they will contain chlorine.
14

IN-LINE ACTIVATED CARBON POST-FILTER ASSEMBLY (FIGURE 6)
SECTION V. OPERATION & MAINTENANCE
C. CHANGING THE IN–LINE ACTIVATED
CARBON POST-FILTER
1. Close the Feed Water Valve by turning fully clockwise.
2. Close the Holding Tank Valve and then open the
Dispensing Faucet to release the pressure.
3. Remove the In–Line Activated Carbon Post-Filter.
Disconnect the used Post-Filter by pressing in the
connector’s collar and at the same time pulling
the tube out of the fitting.
4. Firmly reconnect the polytubes to the new Post-Filter.
(Refer to Fig. 6). Make sure the tubing is pressed all
the way in to create a pressure tight connection.
NOTE: If you want to pull the tubing out for some
reason, push the ring around the tubing in and
pull the tubing out.
5. Slowly open the Feed Water Valve.
6. When water begins dripping out of the Faucet, in the
following order, close the Faucet and open the Holding
Tank Valve. When the Faucet is first opened, expect air
and carbon fines (very fine black powder), from the new
Post-Filter to be rinsed out. This is normal for the first
tank of watertight connection.
7. The RO 4300RX Deluxe System includes upgraded
quick release fittings which help make change
outs easier.
• Thread male inserts (B and C) into filter body using
teflon tape.
• Attach coupling body (A and D) to tubing .
• Filter connects by inserting inserts into coupling
bodies until they snap together. Always ensure
ensure flow direction lines up with arrow on filter.
• To release when its time to replace, push in the
thumb latch and fittings will separate.
• Transfer insert to new post filter then
reconnect to coupling body.
15
In-Line Activated Carbon Post-Filter
To Dispensing
Faucet
O
U
T
IN
3/8"
Blue
3/8" Blue
To Dispensing
Faucet
Coupling
Body
3/8"
Blue
3/8" Blue
Deluxe In-Line Activated Carbon Post-Filter
O
U
T
IN
Insert Coupling
Body
Insert
A B C D

PERMEATE PUMP INSTALLATION INSTRUCTIONS
SECTION VI. DELUXE COMPONENT INSTALLATION
1. Inspect Permeate Pump, fittings, and Permeate Mounting Clip Kit. Remove the plugs from the 4 ports and make
sure there is no foreign material in the ports.
2. Mounting of Permeate Pump: The Permeate Mounting Clip Kit, (includes clip and 2 #10 x 3/4" self-tapping screws)
mount the clip on a suitable location using the two screws provided.
3. The label clearly shows the location of each port. Mount the Permeate Pump with Outlets (both brine and permeate)
Positioned Up. This step is VERY IMPORTANT to rid any entrapped air.
4. (If System has been pressurized prior to pump install) Shut off feed water and turn off product tank valve.
Bleed residual pressure by opening the faucet.
5. Locate the ¼" Black Drain tube. The flow restrictor on the end of the black tube plugs into the manifold
of the RO-4300RX System.
A. The Permeate pump brine side should be installed between the R.O. System and the air-gap faucet connection.
From the R.O., plug black tube into “BRINE IN” port.
B. Connect a new length (long enough to reach the air gap drain) of tubing to the "BRINE OUT" fitting on the
Permeate Pump. Be sure tube bottoms out in the fitting. This tube connects directly to the air gap drain.
6. Locate the product water (permeate) ¼” white tube exiting (after) the Alkaline cartridge.
A. From outlet of alkaline cartridge connect the tube to the "PERMEATE IN" fitting on the Permeate Pump.
B. Connect a new tube from the "PERMEATE OUT" fitting on the Permeate Pump to the reducing tee as
shown in Figure 1.
7. Turn on feed water supply and open product tank valve. The Permeate Pump should begin cycling.
An audible clicking sound will be heard as the pump operates.
Important: If pump is not cycling (clicking), make sure all connections are made correctly and that all
entrapped air has been bled from the lines by just cracking open the faucet.
PERMEATE PUMP (FIGURE 7)
16
Permeate Out
Permeate In
Brine Out
Brine In

PROBLEM POSSIBLE CAUSE SOLUTION
LOW
QUANTITY OF
PRODUCT
WATER
FROM
HOLDING
TANK
Feed Water Valve is plugged or closed. Open Valve or unclog.
Clogged Sediment Pre-Filter or
Activated Carbon Pre-Filter. Replace filters.
Low water pressure. Feed Water pressure
must be above 40 psig.
R.O. Membrane is fouled. See Feed Water operating limits.
Correct cause of fouling, replace Membrane.
Plugged In–Line Activated
Carbon Post-Filter. Replace Post-Filter.
Air precharge pressure in
Holding Tank is too high.
Empty water from Holding Tank,
and with the faucet open, adjust air
pressure to 5–7 psig (35–48 kPa) range.
Air precharge is too low.
Air bladder in the Holding Tank is ruptured. Replace tank.
Holding Tank Valve is closed. Open Valve.
No drain flow, the Drain Restrictor is plugged. Clear or replace Drain Restrictor.
No drain flow, the drain orifice in the Dispensing
Faucet is plugged. Clear or replace the Dispensing Faucet.
The Check Valve is stuck. Free check.
The ASO Valve is malfunctioning. In-Line Activated Carbon Post-Filter is plugged.
LOW
PRESSURE
AT THE
DISPENSING
FAUCET
In-Line Activated Carbon Post
Filter is plugged. Replace Post-Filter.
Air precharge in the Holding Tank is too low.
Empty water from Holding Tank and with
the faucet open, adjust the air pressure
to 5–7 psig (35–48 kPa) range.
Check for leakage at the Air Valve Stem.
Holding Tank Valve is partially closed. Open Valve.
The Dispensing Faucet is out of
adjustment or faulty.
Allow Holding Tank to refill (adding a second
Holding Tank will increase storage capacity).
Low Water Production. See Low Quantity of Product Water from
Holding Tank section above
HIGH TOTAL
DISSOLVED
SOLIDS (TDS)
IN THE
PRODUCT
WATER
Clogged Sediment Pre-Filter or
Activated Carbon Pre-Filter. Replace Filters.
Low Water Pressure. Feed Water Pressure must be above 40 psig.
Check Feed Water Valve.
R.O. Membrane O–ring is crimped. Check O–ring.
R.O. Membrane brine seal is not
sealing up into the manifold head. Check the brine seal.
R.O. Membrane has expired. If Membrane life is unusually short, find and
correct the problem. Replace Membrane.
SECTION VII. TROUBLE SHOOTING GUIDE
17

PROBLEM POSSIBLE CAUSE SOLUTION
HIGH TOTAL
DISSOLVED
SOLIDS (TDS)
IN THE
PRODUCT WATER
(CONTINUED)
The Product Water and Drain
Water lines are reversed. Correct plumbing.
No drain flow, Drain Restrictor is clogged. Clear or replace Drain Restrictor.
No drain flow, the drain orifice in
the Dispensing Faucet is plugged. Clear or replace Dispensing Faucet.
The ASO Valve is not closing. Repair or replace the ASO Valve Components.
New In-Line or Activated Carbon
Pre-Filter not rinsed completely. Flush with several full tanks of Product Water.
The Feed Water TDS has increased. An increase in Feed Water TDS will give a
corresponding increase in Product Water TDS.
TASTES
AND ODORS
IN THE
PRODUCT
WATER
The In-Line or Activated Carbon
Pre-Filter is exhausted. Replace Filters.
There is foreign matter in the Holding Tank. Clean, flush and sanitize the system.
Replace the filters.
The Product Water and Drain Water
lines are reversed. Correct plumbing.
Dissolved gases in the Feed Water. Pretreat Feed Water to remove
dissolved gases.
Increase in Product Water TDS. See high TDS in the Product Water section.
AMBER LIGHT ON
WATER QUALITY
MONITOR
System not being used for extended period of time. Empty storage tank. Wait 15 minutes for the system
to begin making water and test water quality again.
Filters are plugged or membrane
is fouled or exhausted. Replace filters and/or membrane.
DRAIN WATER
OVERFLOWS
AT THE
DISPENSING
FAUCET
Air Gap is blocked.
Clear Air Gap.
Rinse with vinegar for removal of calcium buildup.
Drain tubing is clogged. Clear tubing.
Drain Clamp hole is misaligned. Align with hole in the drain pipe.
Excessive drain flow rate. Replace Drain Restrictor.
FAUCET LEAKS
OR DRIPS Leaks from base of the delivery tube. O–ring is bad, replace O–ring.
FITTING LEAKS
IN GENERAL
Close the Feed Water Valve and relieve pressure before disconnecting any tubing or replacing
any fitting. Before replacing a fitting, re–cut the tubing and re–insert into the fitting to see if that
solves the leak. If pipe threads are leaking, remove and re-tape with Teflon tape.
SECTION VII. TROUBLE SHOOTING GUIDE CONTINUED
18

EXPLODED VIEW AND PARTS LIST
19A......Water Quality Test Kit
23.........Nitrate/Nitrite Test Kit
Optional Deluxe Components
17
19
20 14
13
12
11
16
18
10
9
15
1
2
3
4
5
6
7
8
24 25
19