Installation Overview
NOTE: Be sure to allow a minimum space of 1
under the filter for removing the sump, to change
the cartridge.
Select Location
Select a location for the filter that is:
■ protected from freezing.
■ not exposed to direct sunlight.
Cut Water Line
WARNING:
A copper or galvanized cold water pipe may be used to ground
electrical outlets in the home. Failure to maintain this ground
path may result in an electric shock hazard. If the cold water pipe
is used to ground electric outlets, please refer to Installing the
Ground Wire section before cutting the pipe.
Turn off the water supply and open a nearby faucet to drain
1
the water out of the pipes.
Using a tape measure or ruler, measure the distance "D"
2
as shown.
■ NOTE: It is recommended that the shut-off valve be placed
before and after the filter as shown in the Installation Overview
illustration.
Install Fittings and Mounting Bracket
Instructions are for installing fittings onto 3/4" copper plumbing.
If the unit is to be installed on any other type of tubing (plastic,
PVC, galvanized), different hardware must be purchased. See
instructions with additional hardware purchased, or consult
a qualified plumber.
Apply about 12" of Teflon tape, in a clockwise
1
direction, to the pipe threads of each fitting.
DO NOT use joint compound on any parts.
2
Use the bracket as a template to find the
two screw locations. Wood screws are
provided. If mounted onto other surface, use appropriate
hardware.
STEP-BY-STEP INSTALLATION INSTRUCTIONS
GXWH04F
"
1
⁄
2
Recommended
shut-off valve
Teflon tape
Recommended
shut-off valve
It is recommended that a shut-off valve be placed on both sides
of the filter.
It is recommended that a mounting bracket be used.
■ Select a secure location to install the filter and mounting
bracket. The location should align the filter housing with the
inlet and outlet pipes and should not cause the pipes to bend.
Mark the distance "D" on the pipe. D is about 5
GXWH04F model and 5
Using a pipe cutter, cut pipe. Sand (file) the cut ends of the
3
pipe to ensure that they are square and smooth.
■ NOTE: Have a bucket and towel available to collect excess water.
GXWH04F
D
Measure to shoulder
3
Drill a 3/16" hole on each marked screw location (optional);
then drive the two wood screws until about 1/4" of thread
is left. Ensure at least one screw is anchored into wall stud.
4
Assemble a fitting through the mounting bracket hole to
the inlet and outlet of the head. Start each fitting by hand
to make sure they don't cross-thread. Use a 1
tighten fittings firmly. DO NOT OVERTIGHTEN.
GXWH04F
3
GXWH20S
Recommended
shut-off valve
" for
1
⁄
4
" for GXWH20S model.
3
⁄
4
GXWH20S
D
of fittings. Copper
pipe butts against
this shoulder.
" wrench to
1
⁄
8
GXWH20S
Recommended
shut-off valve