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Installing the water heater
Condensate Management and Vent Risers
NOTICE: Vent
riser fittings and
pipe must be in-
cluded in the total
vent length calcula-
tion as described
in the manual.
CAUTION: Make
sure drain port cap
is securely in place.
NOTICE: Some
models are not sup-
plied with a drain-
able coupling. If con-
densation is required,
please contact the
service department
listed on the back of
this manual.
14
There is no condensate collection and disposal
required for Rheem water heaters under most
conditions. Installations where the vent run is
short or it runs through conditioned space in the
home, such as basements or interior walls, do not
typically cause condensation and will not require
any condensation disposal methods regardless of
vent pipe slope. Figure 1 shows the recommended
vent pipe slope of no less than 1/8 inch per foot
away from the water heater. Any condensation
in the venting system will drain toward the vent
termination. The blower pipe coupling features a
capped drain port which is not needed in this case.
Slope Away
Drain Port
with Cap
Figure 1
There are vent piping configurations, when
combined with certain environmental conditions
that can produce enough condensate to require
collection and disposal. When a slope away from
the water heater cannot be achieved and condensate
handling is required in a horizontal vent system, the
vent pipe should be sloped toward the water heater
as shown in Figure 2.
Slope Toward
Drain Port
Figure 2
•
Remove drain port cap.
•
Connect flexible condensate drain tube to the
blower drain port.
•
Loop the drain tube so that it has a circular
trap. See Figure 3.
•
Secure the top and bottom of the loop with
wire ties or plastic zip ties as shown.
•
DO NOT restrict any portion of the circular
drain tube.
•
Loop must be smooth and not collapse the
tube.
•
Fill circular drain tube with water to make sure
combustion gases cannot vent into the room.
Trap
To Drain
From Drain
Port
Wire or Zip
Ties
Figure 3
•
Condensation collected must be discharged per
local codes.
•
DO NOT drain over public way or walkway.
•
Refer to local codes for any condensate
requirements.
Figure 4
If the venting system is vertical and condensation
handling is required, then the blower coupling drain
port and tube must be used as described previ-
ously. Any horizontal portion of the vent pipe must
slope toward the water heater at a minimum of 1/8
inch per foot so a water trap is not created. See
Figures 4 & 5 as examples of a vertical installa-
tions with condensation removal tube and trap.
A vent riser is used when the vent termination
cannot be located above grade or snow lines.
Power vented water heaters installed with a vent
riser should have a slope toward the water heater
if the venting is long and passes through uncon-
ditioned spaces. It is recommended that these
installations have the condensate collection and
disposal method defined previously. Figure 6 shows
a condition where a vent riser is necessary to meet
the minimum clearance. Note that the vent pipe
must slope back to the water heater so that a water
trap is not created at the outside 90 degree elbow.
Floor Above
Figure 6
Water
Filled
To Drain
Figure 5
Ground or Max
Snow Level
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