GE GXMH31H Owner's Manual & Installation Instructions page 10

Installation Requirements.
PLUMBING CODES
All plumbing must be completed in accordance
with national, state and local plumbing codes.
In the state of Massachusetts: The Commonwealth
of Massachusetts plumbing code 248-CMR shall be
adhered to. A licensed plumber shall be used for
this installation.
AIR GAP REQUIREMENTS
A drain is needed for regeneration water (See
Figure 1). A floor drain, close to the water
softener, is preferred. A laundry tub, standpipe,
etc. are other drain options. Secure valve drain
hose in place. Leave an air gap of 1-1/2" between
the end of the hose and the drain. This gap is
needed to prevent back flow of sewer water into
the water softener. Do not put the end of the
drain hose into the drain.
Drain
Hose
1-1/2"
air gap
FLOOR DRAIN STANDPIPE
Drain
Hose
1-1/2"
air gap
1-1/2"
air gap
LAUNDRY TUB
Figure 1
VALVE DRAIN REQUIREMENTS
Using the flexible drain hose (included) (see Figure
2), measure and cut to the length needed. Flexible
drain hose is not allowed in all localities (check
your plumbing codes). If local codes do not allow
use of a flexible drain hose, a rigid valve drain run
must be used. Purchase a compression fitting (1/4
NPT x 1/2 in. minimum tube) and 1/2" tubing from
your local hardware store. Plumb a rigid drain as
needed (see Figure 3).
NOTE: Avoid drain hose runs longer than 30 feet.
Avoid elevating the hose more than 8 feet above
the floor. Make the valve drain line as short and
direct as possible.
FLEXIBLE DRAIN LINE
Drain
Hose
Drain hose adapter
RIGID DRAIN LINE
Clip
Cut barbs from valve drain
elbow (pull clip and remove
drain valve elbow from valve)
10
1/4" NPT Thread
Barbs for 3/8 I.D. tubing
Figure 2
Compression fitting
1/4 NPT x 1/2 O.D
tube (not provided)
1/4 NPT thread
Barbs
1/2 outside
diameter
copper tube (not
provided)
Figure 3
Hose clamp
Drain hose