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Technical Support: 1-800-863-9392 (M-F 7:30 am - 5:00 pm CST)

Undersink Water Filter 

Installation and Operating Instructions 

Model W38-PR

A

NOTE: 

This filter housing does not include a filter cartridge

Specifications

Temperature Range: 

40–100°F (4.4–37.7°C)

Pressure Range: 

30–125 psi (2.1–8.62 bar)

Parts Included:

•  Filter housing assembly
•  Instructions

Precautions

WARNING:

 Do not use with water that is microbiologically unsafe 

or of unknown quality without adequate disinfection before or after 

the system.

CAUTION:

 Filter must be protected against freezing, which can 

cause cracking of the filter and water leakage.

CAUTION:

 The rubber o-ring provides the water-tight seal between 

the cap and the bottom of the housing. It is important that the o-ring 

be properly seated in the groove below the threads of the housing or 

a water leak could occur.

CAUTION:

 Because of the product’s limited service life and to 

prevent costly repairs or possible water damage, we strongly 

recommend that the bottom of all plastic housings be replaced every 

ten years.  If the bottom of your housing has been in use for longer 

than this period, it should be replaced immediately. Date the bottom of 

any new or replacement housing to indicate the next recommended 

replacement date.

CAUTION:

 Clear housings may crack or craze in time causing failure 

and leakage if exposed to organic solvents such as those found in 

aerosol sprays for cleaning products and insectides.

Tools and Materials 

Required

•   3/8" compression elbows 

and fittings for copper pipe

•   3/8" plastic Tubing

•   Teflon

®

 tape

•   File

•  Pencil

 

•  Screwdriver

•   2 adjustable wrenches

•   Pipe cutters or hacksaw

•   WW38 housing wrench 

(optional)

NOTE: 

•  For cold water use only.
•  Do not install where system will be exposed to direct sunlight.
•   Make certain that installation complies with all state and local 

laws and regulations.

•   The contaminants or other substances removed or reduced by 

the selected cartridge are not necessarily in your water. Ask your 

local water municipality for a copy of their water analysis, or have 

your water tested by a reputable water testing lab. 

•   After prolonged periods of non-use (such as during a vacation) it 

is recommended that the system be flushed thoroughly. Let water 

run for 5–6 minutes before using.

•   The filter cartridges used with this system have a limited service 

life.  Changes in taste, odor, and/or flow of the water being filtered 

indicate that the cartridge should be replaced.

•   Some harmless bacteria may attack cellulose media cartridges. 

If your cartridge seems to disintegrate or develops musty or 

moldy odor, switch to a synthetic media cartridg or consult the 

manufacturer.

 

145561   Rev E   12/04

Summary of Contents for W38-PRA

Page 1: ...xt recommended replacement date CAUTION Clear housings may crack or craze in time causing failure and leakage if exposed to organic solvents such as those found in aerosol sprays for cleaning products and insectides Tools and Materials Required 3 8 compression elbows and fittings for copper pipe 3 8 plastic Tubing Teflon tape File Pencil Screwdriver 2 adjustable wrenches Pipe cutters or hacksaw WW38...

Page 2: ...th inlet and outlet ports E NOTE Allow 11 2 inches clearance below housing to enable filter cartridge changes 3 F Assemble all fittings Start adapters into cap by hand Use a wrench to tighten firmly DO NOT OVER TIGHTEN About one thread should remain visible Mount filter in marked location using bracket see step 2 Using a pipe cutter or hacksaw remove a 3 section of pipe from the 3 8 cold water line an...

Page 3: ... filter to fill with water 8 Depress red pressure relief button to release trapped air Flush cartridge for 15 minutes before use Check for leaks before leaving installation Troubleshooting Leaks between cap and bottom of filter housing 1 Turn off water supply and press the red pressure relief button Remove bottom of housing 2 Clean o ring and o ring groove located directly beneath threads of housing ...

Page 4: ...R IM PLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WITH REGARD TO THE PRODUCTS PARTS AND ANY ACCOMPANYING WRITTEN MATERIALS To the maximum extent permitted by applicable law American Plumber shall not be liable for any damages whatsoever including but not limited to loss of time inconvenience expenses labor or material charges incur...

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