Rheem GHE 125-500A, Use & Care Manual, Page: 9 / 40

9
Failure to properly vent the water heater to the
outdoors as outlined above and in the following
section can result in unsafe operation of the water
heater causing bodily injury, explosion, fire and
death.
Condensate line must be pitched down at least 1/4"
per foot to properly drain. If this cannot be done or a
very long length of condensate hose is used, you must
increase the condensate hose to a minimum of 1" ID and
place a tee in the line after the condensate neutralizer, to
properly reduce vacuum lock in the drain line (See Figure
2).
Minimum clearance from combustible material is
0" for the sides, top, and back of this water heater.
This water heater is approved for installation in
an alcove with the required clearances shown in
Figure 4.
NOTICE: DO NOT use in conjunction with a GFCI.
To avoid the risk of fire, explosion or asphyxiation from
carbon monoxide, NEVER operate this water heater
unless it is properly vented and has an adequate air
supply for proper operation. The vent pipe must overlap
a minimum of ½" on each connection. It is important that
the vent pipe engages fully into any pipe fitting and be
kept in that position until the adhesive has fully cured. DO
NOT drill or punch holes in the plastic pipe or fittings.
WARNING
!
Installation
Figure: 3
WARNING
!
The water heater must be vented to the
outdoors as described in these instructions.
DO NOT connect this water heater to an existing
Vent or Chimney; it must be vented separately from
all other appliances.
WARNING
!
Figure 4
Required Minimum Access Clearances
Combustible or
non-combustible walls
Combustible or
non-combustible floors
24”
24”
12”
24”
12" Min., recommended 24"