Watts 315 User manual

Watts Water Quality, 8716 W Ludlow Drive Suite #1, Peoria, AZ 85381
Phone: [phone] Fax: [phone]
Manual #: 199613 Manual Date: 11/11/2015
IOM-WQ-315_415_525
Model 525P Shown
Installation, Operation
and Maintenance Manual
Under Counter Reverse Osmosis System
Model 315, 415, 525, 525P
WARNING
!
Please read carefully before proceeding with
installation. Your failure to follow any attached
instructions or operating parameters may lead to the
product’s failure.
Keep this Manual for future reference.
WARNING
!
Do not use with water that is microbiologically unsafe or of
unknown quality without adequate disinfection before or
after the system.
If you are unsure about installing your WATTS water filter, contact
a WATTS representative or consult a professional plumber.
Test the water periodically to verify that the system is performing
satisfactorily.
Discard small parts remaining after the installation.
Failure to install the system correctly voids the warranty.
Handle all components of the system with care. Do not drop,
drag or turn components upside down.
Be sure the floor under the water filter system is clean, level
and strong enough to support the unit.
IMPORTANT
CAUTION
!
NOTICE

Thank you for choosing the WATTS WATER QUALITY Reverse Osmosis Drinking Water System. With proper
care your water ltration system will produce high quality drinking water for many years.
Read carefully and follow the instruction in this manual before proceeding with the actual installation. Pay
particular attention to all warnings, cautions and notes. Failure to do so could result in personal injury or
damage to the equipment or other property. System and installation need to comply with state and local laws
and regulations.
CHECK LIST:
1) Reverse Osmosis Unit.
2) Water storage tank, 3 gallon volume (2.5 gallon @40psi).
3) Installation kit: tank ball valve, drain saddle clamp (1/4” & 3/8”), feed water valve, faucet assembly.
4) Manual.
* Variable speed drill
* 1/8” and 1/4” drill bits
* 7/16” drill bit 1/2” and 9/16 open-end wrenches (or adjustable)
* Phillips screwdriver
* Utility knife
RECOMMENDED TOOLS LIST
This reverse osmosis system contains a replaceable component critical to the efciency of the system.
Replacement of the reverse osmosis component should be with one of identical specications, as dened by the
manufacturer, to ensure the same efciency and contaminant reduction performance.
The product water shall be tested periodically to verify that the system is performing
satisfactorily.
Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection
before or after the system.
1) Reverse Osmosis Unit
(525P Shown)
2) Water Storage
Tank 3 Gallon
3) Installation Kit
2

315 RO FILTRATION PROCESS
SPECIFICATIONS:
1st stage: Carbon Block lter, 5 micron, 10”
2nd stage: TFC membrane, 50GPD
3rd stage: Carbon Block lter, 5 micron, 10”
Auto shut off valve
Operating pressure: 40-100 PSI
Operating temperature: 40-100°F
Please contact your local dealer at:
REPLACEMENT PARTS
WATTS ITEM# DESCRIPTIONS SERVICE LIFE
F109009 Carbon block lter, 5 micron, 10” 6-12 months
W-1812-50 TFC membrane, 50GPD @ 60PSI 24-36 months
F109009 Carbon block lter, 5 micron, 10” 6-12 months
3

415 RO FILTRATION PROCESS
SPECIFICATIONS:
1st stage: Sediment lter, 5 micron, 10”
2nd stage: Carbon block lter, 5 micron, 10”
3rd stage: TFC membrane, 50GPD @ 60PSI
Auto shut off valve
Operating pressure: 40-100 PSI
Operating temperature: 40-100°F
Please contact your local dealer at:
REPLACEMENT PARTS
WATTS ITEM# DESCRIPTIONS SERVICE LIFE
IF-SP-1005 Sediment lter, 5 micron, 10” 6-12 months
F109009 Carbon block lter, 5 micron, 10” 6-12 months
W-1812-50 TFC membrane, 50GPD @ 60 PSI 24-36 months
W560033 Inline carbon lter 12-18 months
4th stage: Inline carbon lter
4

525 RO FILTRATION PROCESS
SPECIFICATIONS:
1st stage: Sediment lter, 5 micron, 10”
2nd stage: Carbon Block lter, 5 micron, 10”
3rd stage: Carbon Block lter, 5 micron, 10”
Auto shut off valve
Operating pressure: 40-100 PSI
Operating temperature: 40-100°F
Please contact your local dealer at:
REPLACEMENT PARTS
WATTS ITEM# DESCRIPTIONS SERVICE LIFE
IF-SP-1005 Sediment lter, 5 micron, 10” 6-12 months
F109009 Carbon block lter, 5 micron, 10” 6-12 months
F109009 Carbon block lter, 5 micron, 10” 6-12 months
W-1812-50 TFC membrane, 50GPD @ 60PSI 24-36 months
W560033 Inline carbon lter 12-18 months
4th stage: TFC membrane, 50GPD @ 60 PSI
5th stage: Inline carbon lter
5

525P RO FILTRATION PROCESS
SPECIFICATIONS:
1st stage: Sediment lter, 5 micron, 10”
2nd stage: Carbon Block lter, 5 micron, 10”
3rd stage: Carbon Block lter, 5 micron, 10”
Auto shut off valve
Operating pressure: 40-100 PSI
Operating temperature: 40-100°F
Please contact your local dealer at:
REPLACEMENT PARTS
WATTS ITEM# DESCRIPTIONS SERVICE LIFE
IF-SP-1005 Sediment lter, 5 micron, 10” 6-12 months
F109009 Carbon block lter, 5 micron, 10” 6-12 months
F109009 Carbon block lter, 5 micron, 10” 6-12 months
W-1812-50 TFC membrane, 50GPD @ 60PSI 24-36 months
W560033 Inline carbon lter 12-18 months
4th stage: TFC membrane, 50GPD @ 60 PSI
5th stage: Inline carbon lter
6

INSTALLATION QUICK LOOK
Please follow 4 color tubing diagram to complete installation
CAUTION: When cutting supplied tubes, predeter-
mine the length by measuring the distance between
the components to be connected.
No tools are needed to connect 4 colored tubes.
HOW TO MAKE A CONNECTION
1. CUT THE TUBE SQUARE
Cut the tube square. It is essential that the outside diameter
be free from score marks and that burrs and sharp edges be
removed before inserting into tting. For soft thin walled plastic
tubing we recommend the use of a tube insert.
2. INSERT TUBE
Fitting grips before it seals. Ensure tube is pushed into the tube
stop.
3. PUSH UP TO TUBE STOP
Push the tube into the tting, to the tube stop. The collet
(gripper) has stainless steel teeth which hold the tube rmly in
position while the o-ring provides a permanent leak proof seal.
4. PULL TO CHECK SECURE
Pull on the tube to check that it is secure. It is a good practice to
test the system prior to leaving site and/or before use.
Disconnecting PUSH COLLET AND REMOVE TUBE
To disconnect, ensure the system is depressurized before
removing the tube. Push in collet squarely against face of tting.
With the collet held in this position, the tube can be removed.
The tting can then be re-used.
Installation needs to comply with State and local plumbing regulations.
Connections Item No. Color of Tubing Description
ARO Faucet FU-WDF-905-CP Blue Pure water to the Faucet
BFeed Water Valve F560080 / F560070 Green Feed Water to RO System
CTank Ball Valve PSV501222W Yellow Pure Water to Storage Tank
DDrain Connector SC500B14/38 Red Discharge Water to Drain
7

8
Make sure the surroundings of the sink are cooled before mounting the faucet to
the sink after drilling and remove all sharp edges.
3)
4)
Determine desired location for the RO faucet on your sink and place a piece of
masking tape over where the hole is to be drilled. Mark the center of the hole on
the tape.
1)
Using a variable speed drill set on the slowest speed, drill a
1
/ 8 “ pilot hole through
both porcelain and metal casing of sink at the marked center of the desired location.
Use lubricating oil or liquid soap to keep the drill bit cool (If drill bit gets hot it may
cause the porcelain to crack or chip).
Using a 1 ¼” hole saw, proceed to drill the large hole. Keep drill speed on the
slowest speed and use lubricating oil or liquid soap to keep the hole saw cool during
cutting.
2)
Drill a ¼” pilot hole. Use a
1
/ 2 ” Hole Punch and an adjustable wrench to punch the
hole in the sink. Change to the 1 ¼” Hole Punch to enlarge the hole.
5)
The faucet can now be installed.
If mounting faucet to a Stainless Steel Sink you will need a 1/2” & 1 ¼” Hole
Punch. The faucet opening should be centered between the back splash
and the edge of the sink, ideally on the same side as the vertical drain pipe.
Note:
Note:
Most sinks are pre drilled with 1 ½” or 1 ¼” diameter hole that you can use for your RO faucet. (If you are
already using it for a sprayer or soap dispenser, see step 1)
Porcelain sinks are extremely hard and can crack or chip easily.
Use extreme caution when drilling. Watts accepts no responsibility for
damage resulting from the installation of faucet. Diamond tip bit recommended.
DRILL A HOLE FOR THE FAUCET IN A PORCELAIN SINK
PUNCH A HOLE FOR THE FAUCET IN A STAINLESS STEEL SINK

9
Typical RO Faucet Installation
3/8”BLUE TUBING FROM
RO MODULE
1/4” RED LINE TO
RO MODULE
3/8” BLUE TUBING FROM
RO MODULE
Drinking Feed Tube Connection
Non Air Gap Faucet
Locate the 3/8” threaded quick connect tting in
the parts bag. After the faucet has been mounted,
thread the tting on the to faucet stem. Connect the
3/8” blue feed tube to the 3/8” quick connect t-
ting on the faucet stem. The nal polishing lter is
clipped on to the top of the RO membrane
housing. Attached to the polishing lter is a 3/8”
quick connect elbow tting. Attach the open end of
the 3/8” blue tubing from the RO faucet to the 3/8”
quick connect elbow on the polishing lter.
With Non Air-Gap faucets this will be the only tube
connected to the RO faucet.
Air Gap Faucet
Follow the drinking feed tube connection instruc-
tions above. Connect the 1/4” drain tube from the
RO module up to the 1/4” tting on the RO faucet.
The 3/8” drain tube from the RO faucet will connect
to the 3/8” drain saddle.
3/8” FAUCET CONNECTOR
LOCK WASHER
COUNTER TOP/SINK
ESCUTCHEON PLATE
BLACK RUBBER
WASHER
3/8” BLUE TUBING FROM
RO MODULE
3/8” FAUCET CONNECTOR
LOCK WASHER
COUNTER TOP/SINK
ESCUTCHEON PLATE
BLACK RUBBER
WASHER
3/8” LINE TO DRAIN
SADDLE

10
Use the 1/4” Drain Saddle with non air-gap faucet and 3/8” with air-gap faucet.
DRAIN SADDLE INSTALLATION
1)
2)
3) The drain saddle must be mounted at least 1 ½” above the nut of the P-trap or cross bar
from the garbage disposal to insure proper drainage. Assemble the drain saddle around
the drain pipe at the best available location. Using Phillips screw driver tighten screws
evenly and securely on both sides of the drain saddle. Keep the plastic compression
nut off at this time.
The small square black foam gasket with a circle cut out of the middle must be applied
to the inside of the drain saddle. Remove sticky tape backing and stick to the drain
saddle as shown.
1 Black compression nut 1 Semicircle bracket with opening
2 Screws 1 Foam gasket
2 Nuts for screws 1 Semicircle bracket
Gather the pieces of the drain saddle
Caution: Do not over tighten the screws. It may crack the drain saddle.
If you have a garbage disposal, do not install the drain saddle near it. Installation
of the drain saddle must be either above the garbage disposal, or if a second sink
drain is available, install it above the cross bar on the second drain. Installation of
the drain saddle near a garbage disposal may cause the drain line to plug.
Caution:
Turn off the cold water supply to the faucet by turning the angle stop valve completely off.
Attach the adapt-a-valve as illustrated in the three photos above, choosing the conguration that ts your
plumbing.
FEED WATER VALVE INSTALLATION
Conguration for 3/8”
(With Brass Fittings)
* Insert White Washer
Hot
Supply
Cold
Supply
Conguration for 1/2”
(Without Brass Fittings)
* Washer
Do not use Teon tape with the Adapt-a-Valve.WARNING:
Caution: Water supply line to the system must be from the cold water supply line only.
Hot water will severely damage your system.
1)
2)

STEP 3: MOUNTING THE TANK BALL VALVE
Note: Do not tamper with the air valve on low side of storage tank. It has been preset at 5-7 psi by the
manufacturers.
1) With the provided teon tape wrap 3-4 turns in a clockwise direction around the male threaded
connection on the top of the storage tank,
2) Connect the ball valve to the thread. Make sure it is tight but not over tight. See <Fig. 5>.
4) Connect the yellow tubing from to the tank ball valve. Push the tubing in all the way to make sure it is
properly seated.
5) Turn the tank ball valve off.
TOPVIEW OF TANK BALL VALVE
(PPSV501222W)
OFF POSITION ON POSITION
<Fig 5>
STEP 4: MOUNTING THE DRAIN CLAMP
The drain clamp (SC500B14/38) will t most standard drain pipe 1/4”. It should be installed above the trap and
on the vertical tailpiece. See <Fig. 6>
1) Position the drain saddle in desired location, mark spot through thread outlet, remove saddle.
2) Drill 1/4”(6.3mm) hole into the drain pipe above the water line of trap.
3) Align the hole drilled in the drain pipe with the drain saddle using a drill bit or other narrow straight
object and tighten clamp.
4) Make sure to align drain saddle to drilled hole. Attach drain saddle to drain pipe and tighten the two
screws evenly. See <Fig. 7>.
5) Connect black tubing to drain clamp.
11

NOTE:
1) Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection
before or after the system.
2) This reverse osmosis system contains a replaceable component critical to the efciency of the system.
Replacement of the reverse osmosis component should be with one of identical specications, as dened by
the manufacturer, to assure the same efciency and contaminant reduction performance.
WARNING: Do not use this RO system appliance to purify non-drinkable sources of water that
are unsafe or with water of unknown quality.
WARNING: Never use hot water or freeze unit.
WARNING: Incorrect installation will VOID the warranty.
12
START UP INSTRUCTIONS
If you have connected your RO system to a refrigerator / ice maker, make sure the ice maker is off (do not allow water
to ow to the ice maker) until ushing (Step 5) is complete and the tank has been allowed to ll completely. Connection
from the RO to the ice maker system should have an in-line valve installed before the ice maker so it can easily be closed
to prevent water owing to the ice maker during start up and periodic maintenance. Your RO tank must be allowed to ll
up fully in order for the ice maker system to work properly.
After the Tank has lled, open the RO Faucet to ush the tank completely. You will know that the tank is empty
when the ow rate from the RO faucet is down to a trickle. Repeat this step two more times. The fourth tank
can be used for drinking. This ushing process should take about 24 hours to complete.
Open the RO faucet and leave it open until water begins to trickle out (it will come out slowly).
4)
Turn on the incoming cold water at the angle stop valve. Open the valve knob on the water feed Adapt-a-Valve
by turning the knob counter clockwise. Check the system for leaks and tighten any ttings as necessary. (Check
frequently over the next 24 hours to ensure no leaks are present).
3)
2)
NOTE:
1)
Close the RO faucet allowing the storage tank to ll with water. It may take 4 to 6 hours to ll the tank
completely depending on the production capability of the membrane, local water temperature and water
pressure.
Flushing of the tank 3 times is only necessary during the initial startup and after replacing the membrane.
During the ll period you may hear water trickling due to the Reverse Osmosis Process.
NOTE:
NOTE:
The ushing process should take about a day to complete.

1) Shut off the source water supply to the RO system.
2) Open the RO faucet and depressurize the RO system and storage tank.
3) Remove pre-lter cartridges, post-lter cartridges, and RO membrane. Discard or prepare for cleaning. If
the RO membrane element is to be reused, disinfectant solution should be introduced into the permeate tube
outlet sufcient to remove biolm in this vulnerable area, before reinserting the membrane into the housing.
Use 1/4 teaspoon (1 ml) of unscented 5.25% sodium hypochlorite liquid household bleach.
4) Wash the internal housing areas with warm soapy water using a clean brush (do not scratch the surface of the
housings). Be sure to clean o-ring grooves thoroughly. Remove the existing o-ring. Discard o-ring or
prepare for cleaning.
5) Rinse off all housing pieces with clean water to remove soap.
6) Replace o-rings, and lubricate with a water soluable lubricant. KY Jelly® or other non petroleum water
based lubricants may be used..
7) Pour about 1/4 teaspoon (1 ml) of unscented 5.25% sodium hypochlorite liquid household bleach into each of
the clean housings and replace housings on the RO system.
8) Disconnect RO storage tank from the system.
9) RO storage tank cleaning procedure:
• Tank sanitizer feeder or small lter housing with ttings and tubing
• Disinfectant solution
• Pressure gauge and air pump
a) The tank should be empty. Check the air pre-charge pressure with an accurate gauge
(low pressure type 0-12 lbs.). The average tank pressure should be 5-7psi (when the tank is empty).
b) Fill the tank sanitizer feeder with the recommended disinfectant dosage, and connect the feeder to the
water supply and RO storage tank.
c) Turn on water supply and force water and disinfectant solution into the RO storage tank. The storage
tank should feel heavy when lled.
d) The disinfectant solution should remain in the tank a minimum of 10 minutes. If the tank has not
been sanitized in over a year, leave the solution in for 20 to 30 minutes. Turn off the water supply
valve and the RO storage tank valve. Disconnect the sanitizer feeder, and connect the RO storage tank
to the RO unit (the tank ball valve should remain closed).
CLEANING PROCEDURES
Recommended items:
13

10) Open the feed water valve and open the RO faucet until water ows freely from the spout. Close the RO
faucet. Hold the disinfectant solution in the RO system, including the tubing and faucet, for a minimum of
10 minutes. Open the tank ball valve.
11) Shut off the feed water valve and open the RO faucet. Let water run out until the ow stops at the RO
faucet.
12) Open the feed water valve. Let water ow freely from the faucet for three minutes. Shut off the water at the
source water supply with RO faucet open.
13) When the ow of water has stopped at the RO faucet, remove the lter housing sumps and membrane
housing from the RO system. Replace the lters and membrane according to the service life.
14) Replace the housings on the RO system. Open the source water valve and allow the water to ow from
the faucet.
• Becausesomeofthedisinfectantmaystillbeinthesystem,thesystemshouldbeushedpriorto
using the water human consumption.
• A maintenance record should be kept for the RO system, including information about the
replacement parts, when service was performed, and by whom.
CLEANING PROCEDURES - CONTINUED
14

PREVENTIVE MAINTENANCE
These recommendations are intended for maximize efciency of RO water production by your system.
1) Filter maintenance
a) It is OK to store lters shrink wrapped on the shelf for several years.
b) To store the sealed, unopened lter, we recommend that it be kept in an air tight container. This
prolongs the shelf life of the carbon lter and avoids having the lter absorb any possible odor from
the air.
2) Membrane maintenance
a) The dry packed membrane usually has a two-year shelf life. To prolong the shelf life, we recommend
keeping unopened dry membrane in a refrigerator.
b) Once the membrane is in use, we recommend running the RO system every day for at least 10-15
minutes (about 1 gallon or 4 liters of drinking water). This helps to maintain the membrane
performance.
c) If the RO system is not used for over a week, drain the storage tank rst. Then ll the tank and drain it
twice. Your RO system is now ready to use again.
d) This reverse osmosis system contains a replaceable component critical to the efciency of the system.
Replacement of the reverse osmosis component should be with one of identical
specications, as dened by the manufacturer, to ensure the same efciency and contaminant
reduction performance.
3) Filter and membrane change procedures:
a) Shut off the water supply.
b) Turn off the tank ball valve by turning it 90 degrees.
c) Open RO faucet to the continuous ow position to relieve pressure.
d) Slide in the housing wrench. Use one hand to hold the system and the other hand to turn the wrench
clockwise to open the housing.
e) After opening the housing, remove the used lter and put the new lter into the housing.
Make sure the o-ring is back in place and turn the housing counter-clockwise to close.
f) Repeat previous step to change second lter.
g) Turn on the water supply and make sure there are no leaks.
h) Let the water drip from the faucet for about 10 minutes. If the water ow is less than 1 cup
(8 oz. or 240 ml) per minute, it may be a signal to change the membrane.
i) Membrane change procedures:
• Unscrew the membrane housing cap.
• Slide out the used membrane and discard.
• Insert the new membrane into the housing. The end with the two o-rings should go in rst; to prevent
leaks be sure it is fully seated in the bottom of the housing.
• Screw the cap back onto the membrane housing, making sure o-ring is still in place.
• It may take 10-20 minutes for the new membrane to run at normal ow.
If the water ow is OK, then turn on the tank ball valve. After 1 minute, turn off the RO faucet and complete the
lter change procedures.
15
Note:Ifitistootighttoopenthehousingyoumaytryunpluggingthettingbetweenred
tubing and the system in order to reduce the air and water pressure inside the housing.

GENERAL USE CONDITIONS:
1. System to be used with municipal or well water sources treated and tested on regular basis to insure bacteriological safe quality.
DO NOT use with water that is micro biologically unsafe or unknown quality without adequate disinfection before and after the
system.
2. Operating Temperature: Maximum: 100°F (40.5°C) Minimum: 40° (4.4°)
3. Operating Water Pressure: Maximum: 100 psi (7.0kg/cm2) Minimum: 40 psi (2.8kg/cm2)
4. pH 2 to 11
5. Maximum iron present in incoming feed water supply must be less than 0.2 ppm.
6. Hardness of more than 10 grains per gallon (170 ppm) may reduce membrane life expectancy.
7. Recommend TDS (Total Dissolved Solids) not to exceed 1800 ppm.
WATTS WATER QUALITY
8716 W. Ludlow Drive #1
Peoria, AZ 85381 USA
MODELS: 315, 415, 525, 525P
This system has been tested according to NSF/ANSI 58 for reduction of the substances listed below. The concentration of the
indicated substances in water entering the system was reduced to a concentration less than or equal to the permissible limit
for water leaving the system as specied in NSF/ANSI 58. 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
pentavalent arsenic, but may not remove other forms of arsenic. This system is to be used on water supplies containing a
detectable free chlorine residual at the system inlet or on water supplies that have been demonstrated to contain only pentavalent
arsenic. Treatment with chloramine (combined chlorine) is not sufcient to ensure complete conversion of trivalent arsenic to
pentavalent arsenic. Please see the Arsenic Facts section of the Performance Data Sheet for further information.
Avg. In. Avg. Eff. % Reduction pH Pressure Max Eff. Inf. challenge Max Allowable
(mg/L) (mg/L) mg/L concentration concentration
mg/L mg/L
Arsenic (Pentavalent) 0.3 0.001 99.6% 50psi 0.004 0.30±10% 0.010 mg/L
Barium Reduction 10 0.12 98.8% 7.24 50psi 0.23 10.0±10% 2.0
Cadmium Reduction 0.03 0.0003 98.8% 7.49 50psi 0.0008 0.03±10% 0005
Chromium (Hexavalent) 0.29 0.003 99.1% 7.24 50psi 0.007 0.03±10% 0.1
Chromium (Trivalent) 0.29 0.001 99.7% 7.24 50psi 0.001 0.03±10% 0.1
Copper Reduction 2.9 0.03 99.0% 7.64 50psi 0.05 3.0±10% 1.3
Cysts 170000/ml 5/ml 99.99% 50psi 29 minimum 50,000/mL 99.95
Fluoride Reduction 8.4 0.2 97.7% 7.49 50psi 0.3 8.0±10% 1.5
Lead Reduction 0.15 0.001 99.3% 7.49 50psi 0.001 0.15±10% 0.010
Radium 226/228 25pCi/L 5pCi/L 80.0% 7.24 50psi 5pCi/L 25pCiL±10% 5pCiL
Selenium 0.10 0.002 98.1% 50psi 0.002 0.10±10% 0.05
TDS 790 29 94.5% 7.80 50psi 47 750±40mg/L 187
Turbidity 11 NTU 0.1 NTU 98.9% 50psi 0.4 NTU 11±1 NTU 0.5 NTU
Recovery - 13.09% Daily Production Rate - 14.33 GPD Efciency - 7.44%
16
Depending on water chemistry, water temperature, and water pressure Watts R.O. Systems production and performance will vary.
Efciency rating means the percentage of the inuent water to the system that is available to the user as reverse osmosis treated water under
operating conditions that approximate typical daily usage. Recovery rating means the percentage of the inuent 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. There is an average of 4 gallons of reject water for every 1 gallon of product water produced. Watts
210-677-8400 or Fax [phone]. REFER TO OWNER’S INSTALLATION/SERVICE MANUAL FOR FURTHER MAINTENANCE
REQUIREMENTS AND WARRANTY INFORMATION.

17
REPLACEMENT PARTS
Model: 315
Model: 415
Model: 525 & 525P
WATTS ITEM# DESCRIPTIONS SERVICE LIFE
F109009 Carbon block lter, 5 micron, 10” 6-12 months
W-1812-50 TFC membrane, 50GPD @ 60 PSI 24-36 months
F109009 Carbon block lter, 5 micron, 10” 6-12 months
WATTS ITEM# DESCRIPTIONS SERVICE LIFE
IF-SP-1005 Sediment lter, 5 micron, 10” 6-12 months
F109009 Carbon block lter, 5 micron, 10” 6-12 months
W-1812-50 TFC membrane, 50GPD @ 60 PSI 24-36 months
W560033 Inline carbon lter 12-18 months
WATTS ITEM# DESCRIPTIONS SERVICE LIFE
IF-SP-1005 Sediment lter, 5 micron, 10” 6-12 months
F109009 Carbon block lter, 5 micron, 10” 6-12 months
F109009 Carbon block lter, 5 micron, 10” 6-12 months
W-1812-50 TFC membrane, 50GPD @ 60 PSI 24-36 months
W560033 Inline carbon lter 12-18 months

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Arsenic (As) is a naturally occurring contaminant found in many ground waters.
Arsenic in water has no color, taste or odor. It must be measured by an arsenic test kit
or lab test.
Public water utilities must have their water tested for arsenic. You can obtain the
results from your water utility contained with in your consumer condence report. If
you have your own well, you will need to have the water evaluated. The local health
department or the state environmental health agency can provide a list of test kits or
certied labs.
There are two forms of arsenic: pentavalent arsenic (also called As (V), As (+5))
and trivalent arsenic (also called As (III), As (+3)). In well water, arsenic may be
pentavalent, trivalent, or a combination of both. Although both forms of arsenic are
potentially hazardous to your health, trivalent arsenic is considered more harmful than
pentavalent arsenic.
RO systems are very effective at removing pentavalent arsenic. A free chlorine residual
will rapidly 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)
where it does convert trivalent arsenic to pentavalent arsenic, may not convert all the
trivalent arsenic in to pentavalent arsenic. If you get your water from a public water
utility, contact the utility to nd out if free chlorine or combined chlorine is used in
the water system.
This Watts Water Quality reverse osmosis system is designed to remove up to 98% of
pentavalent arsenic. It will not convert trivalent arsenic to pentavalent arsenic. Under
laboratory standard testing conditions, this system reduced 0.30 mg/L (ppm) pentavalent
arsenic to under 0.010 mg/L (ppm) (the USEPA standard for drinking water). Actual
performance of the system may vary depending on specic water quality conditions at
the consumer’s installation. In addition to the independent laboratory standard testing
conditions Watts has conducted additional eld testing on our reverse osmosis units
to determine trivalent arsenic reduction capabilities. Based upon Watts eld testing, it
has been determined that the RO units are capable of reducing up to 67% of trivalent
arsenic from the drinking water.
ARSENIC FACT SHEET

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TROUBLE SHOOTING
Note: turn off the system before servicing
PROBLEM CAUSE SOLUTIONS
Milky colored water Air in system Air in the system is a normal
occurrence with initial startup of
the RO system. This milky look
will disappear during normal use
within 1 to 2 weeks.
Noise from faucet Air gap faucet
Location of drain saddle
Restriction in drain line
Will disappear after system shuts
down
Relocate the drain to above water
trap.
Blockage sometimes caused by
debris from garbage disposal or
dishwasher
Small amount of water from stor-
age tank
System just starting up
Air pressure in storage tank is low
Normally it takes 2-3 hours to ll
tank. Low water pressure and/or
temperatures can reduce production
rate.
Add pressure to storage tank. The
pressure should be 8-10 psi when
the tank is empty
Slow production Low water pressure
Crimps in tubing
Clogged pre-lters
Fouled membrane
Add a booster pump
Make sure tubing is straight
Replace pre-lters
Replace membrane
Water taste or smell offensive Post carbon is depleted
Fouled membrane
Sanitizer not ushed out
Replace post carbon
Replace membrane
Drain storage tank and Rell it
overnight
No drain water Clogged ow restrictor Replace ow restrictor
Leaks Fittings are not tightened
Twisted O-ring
Misalignment of hole in drain
saddle
Tighten ttings as necessary
Replace a o-ring
Realign drain saddle

Limited Warranty
This Reverse Osmosis System is warranted against defects in material and workmanship for a period of one year from
the date of installation, not to exceed 1 year from the date of manufacture. Expendable items such as lter cartridges
and membranes are not covered by this warranty.
How to obtain Warranty Service: Contact the dealer that you purchased the system from. Watts will work in conjunction
with our dealer to repair or replace at our discretion any unit that is determined to be defective. No returns will be
accepted with out the proper return authorization number.
What this warranty does not cover: This warranty does not cover defects resulting from improper installation, from
abuse, misuse, misapplication, improper maintenance, neglect, alteration, accidents, casualties, re, ood, freezing,
environmental factors, water pressure spikes or other such acts of God.
Return shipping charges are not included in this warranty and are the responsibility of the end user.
This warranty will be void if defects occur due to failure to observe the following conditions:
1. The Reverse Osmosis System must be hooked up to a potable municipal or well cold water supply.
2. The hardness of the water should not exceed 10 grains per gallon, or 170 ppm.
3. Maximum incoming iron must be less than 0.2 ppm.
4. The pH of the water must not be lower than 2 or higher than 11
5. The incoming water pressure must be between 40 and 100 pounds per square inch.
6. Incoming water to the RO cannot exceed 105 degrees F (40 degrees C.)
7. Incoming TDS/Total Dissolved Solids not to exceed 1000 ppm.
8. Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection
before or after the system.
This warranty does not cover any equipment that is relocated from the site of its original installation.
This warranty does not cover any equipment that is installed or used outside the United States of America and Canada.
LIMITATIONS AND EXCLUSIONS:
WATTS WILL NOT BE RESPONSIBLE FOR ANY IMPLIED WARRANTIES, INCLUDING THOSE OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. WATTS WILL NOT BE RESPONSIBLE
FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING WATER DAMAGE, TRAVEL
EXPENSE, TELEPHONE CHARGES, LOSS OF REVENUE, LOSS OF TIME, INCONVENIENCE, LOSS OF USE
OF THE EQUIPMENT, AND DAMAGE CAUSED BY THIS EQUIPMENT AND ITS FAILURE TO FUNCTION
PROPERLY. THIS WARRANTY SETS FORTH ALL OF WATTS RESPONSIBILITIES REGARDING THIS
EQUIPMENT.
OTHER CONDITIONS:
If Watts chooses to replace the equipment, it may be replace with reconditioned equipment. Parts used in repairing
or replacing the equipment will be warranted for 90 days from the date the equipment is returned to you or for the
remainder of the original warranty period, whichever is longer. This warranty is not assignable or transferable.