Culligan Drinking Water System User manual

Culligan Water
Tower™
Drinking Water
System Owners
Guide

Culligan Water
Tower™
CWT35ST.3.0
NOTICE: This system is intended for use on potable water supplies or disinfected water containing
cysts. Do not use where water is microbiologically unsafe or with water 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.
2

Table of Contents
Safety/Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
System Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Introduction
About Your System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
System Component Description . . . . . . . . . . . . . . . . . . . . . . . . . .5
Application Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Certified Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Servicing Your System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Cartridge Replacement, Cleaning and Sanitizing Procedure . . . . . . . . . .9
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Service Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
California Certificate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
3

System
Specifications
System Flow Sequences . . . . . . . . . . . . . . . . . .Sediment Filter, Activated Carbon Filter, Reverse
Osmosis Membrane, Storage Tank, Polishing Filter,
Dispensing Faucet.
Sediment Filter . . . . . . . . . . . . . . . . . . . . . . . . .Spun Polypropylene Type
Carbon Filter . . . . . . . . . . . . . . . . . . . . . . . . . .Activated Carbon Block
Reverse Osmosis Membrane . . . . . . . . . . . . . . .Thin Film Composite Type
Product Production Rate without
Storage Tank to Atmosphere2. . . . . . . . . . . . . .35 gpd
Ratio of Product to Flush Flow3
Soft Water Applications . . . . . . . . . . . . . . . .1:1
Hard Water Applications . . . . . . . . . . . . . . .1:3 - 1:5
Polishing Filter . . . . . . . . . . . . . . . . . . . . . . . . .Activated Carbon Block
Dispensing Faucet . . . . . . . . . . . . . . . . . . . . . .Culligan®Smartap®Rotary Operation, Stainless
Steel and Resin Flow Passages, with Built-in Siphon
Break and Quality Monitor
Color Options . . . . . . . . . . . . . . . . . . . . . . .Polished Chrome, Satin Chrome, White, Black,
Black/Chrome, Almond
Storage Capacity . . . . . . . . . . . . . . . . . . . . . . .3 gallons (max.)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.4 gallons (nom.)
Dimensions
Filter Assembly . . . . . . . . . . . . . . . . . . . . .15.5”W x 6”D x 15”H
Storage Tank . . . . . . . . . . . . . . . . . . . . . . .11” Diameter x 15.5”H
*DPR - Daily Production Rate
1 Rating at 50 psi, 77°F, 500 mg/L TDS influent.
2This is a factory specification for membrane production. Actual production rate and TDS reduction
will depend on temperature, water pressure, TDS level, membrane variation and usage pattern.
3May vary with pressure. See Technical Manual for all hard water applications and applications
where TDS exceeds 1000 mg/L (ppm).
4Efficiency rating means the percentage of the influent water system that is available to the user
as reverse osmosis treated water under operating conditions that approximate typical daily usage.
5 Recovery rating means the percentage of the influent water to the membrane portion of the sys-
tem 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.
4
3 Gallon
System DPR* to Storage Tank111.0 (41.6 L)
Efficiency Rating420%
Recovery Rating543%

Introduction
Thank you for choosing a Culligan Water Tower™ drinking water system. Your new system is
designed to bring you years of healthful, deliciously crystal-clear Culligan®water. With its special
faucet installed on your sink, it’s like getting bottled water straight from your kitchen tap.
With the Culligan Water Tower drinking water system, you’ll get a continuous supply of clear,
refreshing water for drinking and cooking. But Culligan improves a lot more than just water. Crystal
clear Culligan water is ideal for:
• coffee • recipes • pasta • tea • baby formula
• ice cubes • soup • houseplants • steam irons
• juice • pets • drink mixes • everything you make with water
With three separate water treatment technologies and its unique space-saving design, the Culligan
Water Tower drinking water system is the most advanced drinking water system available from
Culligan today.
About Your System
The reverse osmosis method of water treatment has long been regarded as one of the most efficient
and effective ways to reduce impurities. It’s the technology we’ve used to build your new Culligan
Water Tower drinking water system. In addition, we’ve incorporated activated carbon and fine parti-
cle filtration to bring you one of the most effective systems available today.
Culligan Water Tower System Components
Sediment Filter - Refer to Figure 2, page 6
The sediment filter screens out dirt, sand, rust, and other microscopic particles 15 times smaller
than a grain of sand.
Activated Carbon Filter
The activated carbon filter gets rid of bad tastes and odors, including chlorine, if present in your
untreated water supply.
Reverse Osmosis Membrane Cartridge
The reverse osmosis (RO) membrane squeezes out dissolved substances, including radium, lead, and
many others. These substances may not be in your water. See Performance Data Sheet for list of
substances and removal percentages.
Manifold Assembly
The manifold serves as the functional hub of the system, directing and regulating the flow through
each of the system’s components. It makes the Culligan Water Tower drinking water system
extremely space efficient and simplifies filter changes.
Storage Tank
The storage tank holds Culligan®water under pressure for rapid delivery.
5

Polishing Filter
The Culligan Water Tower™ drinking water system includes a second activated carbon filter in the
manifold as added assurance that your water will be crystal clear.
Culligan®Smartap®Water Quality Monitor and Faucet
The special drinking water faucet mounts conveniently on your kitchen sink. A simple twist of the
handle is all it takes to enjoy refreshing Culligan drinking water.
Your Culligan Water Tower incorporates a proven performance indicator. The patented Smartap®
Water Quality Monitor uses dual probe LOGIC PULSE MEMORY
technology to accurately indicate membrane performance. A split-second power pulse compares feed
water Total Dissolved Solids (TDS) level with that of the product water. Then, by reversing the polar-
ity of the electronic pulse, the probes are cleaned and kept free of chemical plating.
Electronics from the Culligan Water Tower connected to the Smartap faucet provides feedback on
system operation.
Indications appear in a light bar integrated into the faucet body
front cover (Figure 1). Power is provided through a nine-volt alka-
line battery. To prolong battery life, indicator lights self-extinguish
after a few seconds even if water is being dispensed.
• Green means quality Culligan water
• Orange tells you that a service check is necessary
• Yellow means a filter change is required
Application Guidelines
The Culligan Water Tower drinking water system is designed for use on potable water supplies meet-
ing the guidelines outlined in Table 1. The system should be installed on your home’s cold water
line. The flushing stream should discharge through an approved siphon break as illustrated in Figure
2, page 6. Installation of this system must comply with state and local laws and regulations.
6
Figure 1

Table 1
1A pressure regulator is recommended for feed water pressures exceeding 80 psig (552 kPa)
2 See the Technical Manual for all applications where TDS exceeds 1000 ppm (1000 mg/L) to cal-
culate effective module pressure. A booster pump is strongly recommended.
3The reverse osmosis membrane filter used in this system may be damaged by chlorine. This sys-
tem includes activated carbon which protects this element by reducing chlorine. Influent chlorine
should not exceed 2 mg/L.
4Do not use with water that is microbiologically unsafe or of unknown quality without adequate
disinfection before or after the system.
Certified Performance
System Tested and Certified by NSF International against NSF/ANSI Standard 58 for the
reduction of: Arsenic (Pentavalent), Barium, Cadmium, Copper, Fluoride, Hexavalent
Chromium, Lead, Radium 226/228*, Selenium, Total Dissolved Solids, Trivalent
Chromium, Cysts, and Turbidity
The Culligan Water Tower™ conforms to NSF/ANSI 58 for pentavalent arsenic reduction. See per-
formance data sheet and arsenic facts section for an explanation of reduction performance.
The substances removed by this system are not necessarily in your untreated water. See
Performance Data Sheet for percentages of contaminant removal.
This system has been tested for the treatment of water containing pentavalent arsenic (also known
as As(V), As(+5), or arsenate) at concentrations of 0.30 mg/L or less. This system reduces pentava-
lent arsenic , but may not remove other forms of arsenic. This system is to be used on water sup-
plies containing a detectable free chlorine residual or on water supplies that have been demonstrat-
ed to contain only pentavalent arsenic. Treatment with chloramine (combined chlorine) is not suffi-
cient to ensure complete conversion of trivalent arsenic to pentavalent arsenic. Please see the
arsenic facts section of the performance data sheet of further information.
* Minimum removal based on approved testing methods with Barium as surrogate.
7
Influent Water Characteristics
Pressure1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35-100 psi (242-690 kPa)
Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40-100°F (4-38°C)
Total Dissolved Solids (TDS)2. . . . . . . . . . . . . . . . . . . . . . . .0-2000 ppm (0-2000 mg/L)
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.0 - 11.0
Chlorine3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0-2 ppm (0-2 mg/L)
Chloramine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0-2 ppm (0-2 mg/L)
Turbidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .<1.0 NTU
Silt Density Index (SDI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .<4
Hardness (CaCO3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .<350 ppm
Hydrogen Sulfide (H2S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.00 ppm
Manganese (Mn) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .<0.05 ppm
Iron . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0-1 ppm (0-1 mg/L)
Bacterial Quality4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Potable

Installation This Owner’s Guide provides visual assembly reference only (Figure 2). Since specialized skills are
required in the assembly of the drinking water system, we recommend that you contact your local
independently operated Culligan®dealer to complete this installation.
Component Location
Product Water Faucet
Faucet may be located in any convenient location. Make sure underside of location is free of obstruc-
tion.
Culligan Water Tower™Module*
Module may be installed under sink or in any convenient location within 15 feet of source water sup-
ply and product water faucet.
Storage Tank
Tank may be placed in any space within 15 feet of faucet, generally under kitchen sink or in adja-
cent unused cabinet. Tubing length between components should be kept to a minimum, avoiding
sharp bends or kinks.
*For installations in Massachusetts, Massachusetts Plumbing Code 248CMR shall be
adhered to. Consult your licensed plumber for installation of this system. The use of
piercing valves is NOT permitted in Massachusetts.
Figure 2
8

Servicing your
system
Service Schedule
When properly maintained, your Culligan Water Tower™ drinking water system will give you years of
dependable service. This reverse osmosis system contains a replaceable treatment component, criti-
cal for the effective reduction of total dissolved solids. The product water should be tested periodi-
cally to verify the system is performing properly. Use the following as a guide to get the most out of
your system. Service frequency may vary depending on your local water conditions. High sediment,
chlorine, turbidity or hardness levels may require more frequent service.
At least once per year
Replace:
• Sediment Filter Cartridge (Item 7)
• Activated Pre-Carbon Filter Cartridge (Item 8A)
• Activated Post-Carbon (Polishing) Filter Cartridge (Item 8B)
Check:
• RO Membrane Cartridge (Item 9)
- TDS Reduction Performance
- Flow Rates - Concentrate & Product
• Flow Control (Item 6)
Clean and Sanitize the System
Use the convenient chart inside the back cover of this booklet to keep track of your system’s mainte-
nance.
Equipment Needed
•Safety glasses
• Rubber gloves, sanitary
• Wash cloth, clean and lint-free
•Liquid dish soap
•Household bleach - unscented only (5-1/4% sodium hypochlorite)
•Plastic storage bag
•Manual air pump
•Plastic bucket
•Plastic bowl
• Silicone lubricant, FDA approved
Have all components and supplies on-hand and ready before beginning procedure.
A clean work area and equipment are essential to properly clean and/or sanitize the system (i.e.,
clean hands, tools, work surface and containers).
Cartridge Replacement
Culligan recommends that you have your Culligan Water Tower drinking water system serviced by
your local Culligan Man™. You can rely on his or her experience and expertise to keep your system
in top operating condition.
9

If you wish to service your system, the filters are available from your Culligan dealer. To locate your
nearest Culligan dealer, call [phone], or visit our website at www.culligan.com. See the Parts
List at the end of this section for replacement numbers.
Cartridge Conditioning
The activated carbon, reverse osmosis, and polishing filter cartridges must be conditioned as follows
prior to installation into the Culligan Water Tower™ drinking water system. Your Culligan Man™ can
do these important procedures at the time of purchase.
Activated Pre-Carbon Filter Cartridge - 2 gallon flush to remove carbon dust
RO Membrane Cartridge - 24 hour flush to remove preservative solution
Activated Post-Carbon (Polishing) Filter Cartridge - 2 gallon flush to remove carbon dust
Tubing Connectors
The Culligan Water Tower drinking water system features easy-to-use push-in tubing connectors
(Figure 3). Fittings consist of two parts: a body and a colored collet. Collet color corresponds to tub-
ing color to be used at that connection (Figure 3A).
1. To install a tube, lubricate the tubing end with water (only) and push it through collet until it
seats firmly at bottom of fitting (Figure 3B). You should feel the tubing pass the O-rings. Cut
ends must be square. Be sure the tubing is smooth and free of abrasions, otherwise a leak may
result. Cut tubing only with a new razor blade.
2. To remove a tube, push and hold the collet against the fitting body and pull the tube from the
fitting. (Figure 3C).
Figure 3A Figure 3A Figure 3A
Cartridge Replacement, Cleaning and Sanitizing Procedure
1. Mix a mild cleaning solution of dish soap and clean potable water in plastic bowl.
2. Empty storage tank and relieve system pressure. Verify tank valve is open. Close feed water sup-
ply valve and open product water faucet.
Note: Additional point-of-use devices (i.e. icemakers) may use filters along their supply line.
Remove any filter or treatment device installed between module and delivery device before pre -
ceding.
Icemaker: Transfer ice cubes from bin/tray to clean freezer container for storage until procedure
is done.
3. Check product water storage tank air pre-charge using low-pressure gauge (PN 34002024). Air
valve is located on tank base. Pre-charge should be 55 kPa (8 psig) with tank empty and tank
valve open.
10

Note: Use hand pump to avoid damaging tank. Verify product water faucet is open before pro -
ceeding. Use caution when working with/inside enclosure. Wiring therein connects monitor com -
ponents. If wires, circuit board, or connections are damaged and/or wetted, monitor will not
function.
Item callouts refer to Figure 5 unless otherwise noted.
4. Remove enclosure front panel by pressing in push-in tabs and pull cover back. (Figure 4)
Figure 4
5. Remove each filter housing (Item 30) by turning it counter-clockwise. Remove each filter car-
tridge (Figure 5).
a. Discard sediment (Item 7) and carbon (Item 8) cartridges
b. Examine membrane (Item 9). If it is performing satisfactorily, proceed to Step 6.
If it is depleted or fouled, discard it and proceed to Step 8.
Note: Wear gloves whenever cleaning/sanitizing system or handling new filter/membrane car -
tridges.
6. Clean membrane outer wrap with washcloth and cleaning solution. Do not immerse membrane in
solution. Do not scrub wrap with abrasive cleaners. Rinse membrane well with clean potable
water.
7. Place membrane into clean plastic bag, close bag.
8. Remove filter housing O-rings and wash them with cleaning solution. Rinse them well with clean
potable water. Inspect them for damage such as nicks or scratches. Replace damaged O-rings.
9. Clean filter housings/manifold, inside and outside, with washcloth and cleaning solution. Do not
use abrasive materials.
10. Rinse housings/manifold with clean potable water.
11. Inspect filter housing O-ring groove and manifold O-ring surface for damage such as nicks or
scratches. Replace if damaged. 11

Figure 5
12. Place a small amount of O-ring lubricant on surface of filter housing O-ring. Install O-ring into
housing.
TO SANITIZE THE SYSTEM: Complete Steps 13-33.
TO INSTALL FILTERS: Complete Steps 20-33.
CAUTION: Wear safety glasses while performing this procedure.
CAUTION: Read “WARNINGS” information on bleach container before using con-
tents. Handle sanitizing solution carefully. Avoid contact with unprotected areas.
13. Mix sanitizing solution of 1.5 ml (1/3 teaspoon) of household bleach and 3.8 L (1 gallon) of
clean, potable water in the bucket. Mix solution well.
Note: Excessive concentrations of bleach (sodium hypochlorite) may damage plastic and rub -
ber components. Rinse all parts that contact bleach thoroughly with clean potable water.
14. Add 236 ml (one cup or 8 oz.) of sanitizing solution to each filter housing and install
them onto the manifold (do not install filters or membrane at this time). Tighten
each filter housing by hand only.
12

Note: Tighten filter housings by hand only. Do not use tools as they will over-tighten and dam -
age housings.
15. Slowly open source water supply valve.
16. Close product water faucet as soon as water begins to flow from spout.
17. Wait 5 minutes, then close source water supply valve.
18. Wait 25 minutes, then open product water faucet. Let water flow to drain until system is
drained (flow stops), then close faucet.
Note: Remove filter housings only after water flow stops.
19. Remove filter housings and dispose of water. Rinse housings/manifold thoroughly with clean,
potable water.
Note: Do not remove protective plastic bag from replacement filter and membrane cartridges.
Note: For optimum monitor performance, the monitor must be re-set and the battery replaced
each time system is sanitized. However, a technician may wait until indicator lights fail to illumi -
nate to replace battery.
20. Hold cartridge by its protective plastic bag and open protective bag to expose cartridge cap and
O-rings.
21. Install cartridges. (Refer to Figure 5 for location of each cartridge).
a. Hold cartridge by its protective plastic bag.
b. Insert cartridge into manifold turning it 1/2 turn as it enters port. Slide bag from cartridge
and discard.
c. Install filter housing (Item 30) as each cartridge is inserted. Make sure housing o-ring is
properly lubricated.
Note: Tighten filter housings by hand only. Do not use tools as they will over-tighten and dam -
age housings. Take care not to cut or pinch the O-rings.
22. Turn feed water valve slowly to open position.
23. Confirm system is producing water. Unit will be sending rinse water to drain. Check
for leaks.
Note: Monitor must be re-set each time the system is serviced to ensure accurate monitor per -
formance.
13

TO RE-SET MONITOR or TO CHANGE BATTERY: Perform Steps 24-27
Refer to Figure 6 for component location.
Use caution when working inside enclosure. Wiring therein connects monitor components. If wires,
circuit board, or connections are damaged and/or wetted, monitor will not function.
Connect battery to monitor after system has been in production mode for at least 5 minutes. This
ensures sensing switch is in proper position to record data.
24. Disconnect battery. The connection is a snap type connector.
25. Remove battery by sliding it out of its holder.
Note: Replace battery with a new alkaline 9-volt battery (PN 31300001)
Figure 6
26. Carefully slide battery into its holder.
27. Connect battery by pressing clip onto battery terminals.
28. Test monitor connection by activating monitor. Open product water faucet. If an indicator light
illuminates, connection is good.
Note: Close faucet immediately after light illuminates. Test confirms battery connection, not
water quality.
29. Install enclosure front panel (Item 3):
a. Place panel in position, aligning push-in tabs with openings. Verify circuit board wiring is
not pinched between panels.
b. Press panel inward until push-in tabs engage, securing the panel.
c. Check for leaks.
14

30. Open product water faucet. Let water flow until all air has been expelled from the system.
31. Close product water faucet. Wait 30 minutes, check connections for leaks, and correct if neces-
sary.
Icemaker/Extra point of use: Check lines for leaks.
32. Allow storage tank to fill overnight.
DO NOT USE FIRST FULL STORAGE TANK OF WATER
33. Discard (to drain) first full tank of water by opening product water faucet until water
flow stops, then close faucet. This flushes sanitizing solution from system.
Icemaker: Let tray/bin fill with ice cubes. Discard all ice cubes to drain. This flushes sanitizing
solution from lines in icemaker. Replace delivery device filter (if applicable).
Note: System is ready to use. Should there be any aftertaste or odor, drain storage tank and
repeat Steps 32 and 33.
15

Troubleshooting
Guide
Water Volume and Quality
Symptom Condition Action
No product water Water supply is turned OFF Turn water ON
Not enough Low water pressure Check source water line pressure
product water
Inlet water supply valve is blocked Clear restriction
Storage tank valve is closed Open storage tank valve
Storage tank is depleted Increase product water storage
capacity and/or install membrane
with higher output rating
Clogged pre-filter cartridge(s) Replace pre-filter cartridge(s)
Storage tank air pressure charge Empty water from storage tank
is low (product water faucet must remain
open while adjusting pressure) and
adjust pressure to 55 kPa (8 psig)
System does not Shut-off valve is not closing Contact your Culligan®Dealer
shut off
No drain water Clogged flow control Replace flow control (Item 6) in
parts list and contact your
Culligan®Dealer
Water has Carbon post-filter is depleted Drain storage tank, sanitize system
offensive taste and replace carbon post-filter
and/or odor cartridge
Membrane depleted or fouled Smartap®Quality Monitor reads
yellow, or if TDS test is
unsatisfactory, drain storage tank,
sanitize system and replace
membrane
Sanitizer not flushed out Drain storage tank and let it refill
overnight
16

Smartap®Quality Monitor Status Indications and Common Solutions
17
Leakage
Symptom Probable Cause Solution
Leak at fitting Tubing not pushed completely Push tube into fitting past
into fitting O-ring seal
Defective tube Cut damaged area from tube or
replace tube
Tubing makes too tight a bend Run the tubing to reduce the bend
near fitting
Leak at filter O-ring has not seated properly Remove O-ring and inspect
housings O-ring groove for debris. Clean
groove, lube and reseat O-ring
O-ring has nicks or scratches Replace O-ring
Leak from air gap Restricted drain tube Clear restriction
in faucet
Tubing from air gap to drain is Re-route tubing so tubing runs
routed incorrectly vertically with no sharp bends
or loops
Leakage
Indication Condition Action
Green Light System operating normally None
Orange Light (appears Shut-off valve is not closing Call your Culligan®dealer
with green or yellow light
Yellow Light Membrane exhausted Replace membrane
No Monitor Lights Light Assembly is not connected Plug connector into phone jack
Battery voltage low Replace battery
Battery is not connected Connect battery

Parts List
18
Item Description Part No.
1Culligan Faucet, Chrome body/spout 11403430
Culligan Faucet, White body/spout 11403431
Culligan Faucet, Almond body/spout 11403433
Culligan Faucet, Black body/spout 11403434
Culligan Faucet, Satin body/spout 11403436
Culligan Faucet, Black body/Polished spout 11403439
2Battery, 9-volt alkaline 31300001
4Bracket, Mounting 21100101
5Screw, Mounting Bracket 32701002
6Flow Control, Green Tape 40600037
7Cartridge, Sediment Culligan®01013028
8Cartridge, Carbon Culligan®01013029
9Cartridge, RO Membrane - 41402004
Green Casing - Purple Tape Culligan®
10 Tank, Product Water Storage - White 34500003
11 Valve, Shut-off w/O-ring 33503601
12 Elbow, 3/8” Stem w/white collet 33503504
Gauge Air Pressure 34002024
Part Numbers in bold italics are Valencia, CA Part Numbers

Service Log
Culligan Water Tower™ Service Log
Model Serial No.
Date Installed
For Service Call Culligan at:
19
( ) -
Cartridge(s) Changed
Activated Activated
Date Sediment Pre-Carbon RO Post-Carbon
Serviced Filter Filter Membrane Filter Sanitized

Arsenic Fact SheetArsenic (abbreviated As) is found naturally in some well water. Arsenic in water has no color, taste or
odor. It must be measured by a lab test. Public water utilities must have their water tested for
arsenic. You can get the results from your water utility. If you have your own well, you can have the
water tested. The local health department or the state environmental health agency can provide a
list of certified labs. The cost is typically $15 - $30. Information about arsenic in water can be found
on the internet at the US Environmental Protection Agency website:
www.epa.gov/safewater/arsenic.html.
There are two forms of arsenic: pentavalent arsenic (also called As (V), As (+5), and arsenate) and
trivalent arsenic (also called As (III), As (+3), and arsenite). In well water, arsenic may be pentava-
lent, trivalent, or a combination of both. Special sampling procedures are needed for a lab to deter-
mine what type and how much of each type of arsenic is in the water. Check with the labs in your
area to see if they can provide this type of service.
Reverse osmosis (RO) water treatment systems do not remove trivalent arsenic from water very
well. RO systems are very effective at removing pentavalent arsenic. A free chlorine residual will rap-
idly convert trivalent arsenic to pentavalent arsenic. Other water treatment chemicals such as ozone
and potassium permanganate will also change trivalent arsenic to pentavalent arsenic. A combined
chlorine residual (also called chloramine) may not convert all the trivalent arsenic. If you get water
from a public water utility, contact the utility to find out if free chlorine or combined chlorine is used
in the water system.
The Culligan Water Tower CWT35ST3.0 is designed to remove pentavalent arsenic. It will not con-
vert trivalent arsenic to pentavalent arsenic. The system was tested in a lab. Under those conditions,
the system reduced 0.30 mg/L (ppm) pentavalent arsenic to 0.010 mg/L (ppm) (the USEPA standard
for drinking water) or less. The performance of the system may be different at your installation.
Have the treated water tested for arsenic to check if the system is working properly.
The RO component of the Culligan Water Tower CWT35ST3.0 must be replaced every 3-5 years to
ensure the system will continue to remove pentavalent arsenic. The component identification and
locations where you can purchase the component are listed in the installation/operation manual.
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