Twin Pipe (Pvc/Cpvc) Termination; Sidewall (Tee And Snorkel); 12: Sidewall Vent And Combustion Air Piping With Tee Termination; 13: Sidewall Vent And Combustion Air Piping With Snorkel Termination - Rinnai RU80i Manual

Certified PVC/CPVC Vent Termination Options (continued)
Twin Pipe (PVC/CPVC) Terminations
PVC/CPVC Sidewall (Tee and Snorkel)
Terminations:
Locate the vent and intake air termination using the
following guidelines:
1. The total length of the vent or intake air piping
must not exceed the limits given in Tables 4-7 (this
document). The equivalent length for 90° elbows
and termination associated with the respective vent
and intake air piping arrangement MUST be
subtracted from total length listed in Tables 4-7.
2. Specific to Side Wall Tee Termination, the vent
and intake air piping must terminate at the outside
surface of the outer wall, minimum 1" between
wall, tee, and elbow socket ends (Figure 12).
3. Termination must be installed 12" (30.5 cm), above
the highest anticipated snow level (Figures 12,13).
4. Refer to Table 2 this document for
recommendation on vent/combustion air intake
terminal position.
NOTE
If the vent is terminated on a sidewall which is subject
to high winds it is recommended to terminate the vent
using a tee. A tee provides the best protection against
wind.
5. The intake air pipe must terminate using a 90°
elbow directed away from the vent termination.
Both vent and air intake pipe terminations must be
installed 12" (30.5 cm) minimum above grade or
highest anticipated snow level and as shown in
Figures 12 and 13.
The information and figures depicting method of
terminating the vent and combustion air intake pipes
are directly related to PVC/CPVC vent systems. When
utilizing other than PVC/CPVC vent system there may
be some variations. Consult the respective vent
manufacturer or the water heater manual for
recommendations and clarifications.
NOTICE
Slope horizontal exhaust piping downward toward the
water heater a minimum of 1/4 inch per foot. DO NOT
slope combustion air piping down towards water
heater. Dispose of condensate per local codes.
12" min
Exhaust Vent
Combustion Air
12" min
1" min.
between
12" above
wall &
anticipated
socket end
snow level
or grade
Figure 12: Sidewall Vent and Combustion Air
Piping with Tee Termination
Exhaust Vent
12" min
12" above
anticipated
snow level
or grade
Figure 13: Sidewall Vent and Combustion Air
Piping with Snorkel Termination
20
NOTICE
Exhaust Vent
12" min
Combustion Air
Wall
Combustion Air
12" min
12" min