LP-179 Rev. 6.7.16
24
Description Stock Code
2” PVC Concentric Termination Kit KGAVT0501CVT
3” PVC Concentric Termination Kit KGAVT0601CVT
2” Stainless Steel Termination Kit V500
3” Stainless Steel Termination Kit V1000
4” Stainless Steel Termination Kit V2000
3” Polypro Vent Kit 8400P-001
Table 9 - Optional Vent Kits
(such as a roof with a parapet wall), ensure the exhaust vent
terminates a minimum of 10’ from nearest wall and extends
level with or above the top of the wall. This will ensure ue gas
does does not get trapped and possibly recirculated into the
intake air pipe, which could contaminate the combustion air.
7. To prevent water leakage, install adequate roof ashing
where the pipe enters the roof.
8. Do not locate vent over public walkways, driveways, or
parking lots. Condensate could drip and freeze, resulting in a
slip hazard or damage to vehicles and machinery.
9. Due to potential moisture build-up, sidewall venting may
not be the preferred venting option. To save time and cost,
carefully consider venting installation and location.
10. Horizontal lengths of exhaust vent must slope back
towards the water heater not less than ¼” per foot to allow
condensate to drain from the vent pipe.
11. The exhaust vent must terminate where vapors cannot
make accidental contact with people or pets, or damage
shrubs or plants.
12. In vacant chimney applications, install and seal a rain cap
over existing chimney openings.
13. All piping must be fully supported. Use pipe hangers at a
minimum of 4 foot intervals to prevent sagging of the pipe
where condensate may form.
14. Do not use the heater to support any piping.
15. A screened straight coupling is provided with the heater
for use as an outside exhaust termination.
16. A screened inlet air tee is provided with the heater to be
used as an outside intake termination.
The following table lists optional exhaust/intake terminations
available from HTP:
H. Applications
1. Direct Vent Installation of Exhaust and Intake
If installing a direct vent option, combustion air must be drawn
from the outdoors directly into the water heater intake, and
exhaust must terminate outside. There are three basic direct
vent options detailed in this manual: 1. Side Wall Venting, 2.
Roof Venting, and 3. Unbalanced Venting.
Be sure to locate the heater such that the exhaust vent and
intake pipe can be routed through the building and properly
terminated. Dierent vent terminals can be used to simplify
and eliminate multiple penetrations in the building structure
(see Optional Equipment in Venting Section). The exhaust
vent and intake pipe lengths, routing and termination
methods must all comply with the methods and limits given
in the Venting section of this manual.
When installing a combustion air intake from outdoors, care
must be taken to utilize uncontaminated combustion air.
NOTE: To prevent combustion air contamination, see Table 2.
Take extra precaution to adequately support the weight of vent
pipes terminating through the roof. Failure to properly support
roof terminated piping could result in property damage, serious
injury, or death.
TWO PIPE SIDEWALL VENTING WITH TEE (INTAKE)
AND COUPLING (EXHAUST)
Figure 15 - Two Pipe Roof and Sidewall Venting with Included
Equipment (Tee and Coupling)
NOTE: These drawings are meant to demonstrate system
venting only. The installer is responsible for all equipment and
detailing required by local codes.
All vent pipes must be glued, properly supported, and the
exhaust pitched a minimum of 1/4” per foot back to the heater
to allow drainage of condensate. When placing support brackets
on vent piping, the rst bracket must be within 1 foot of the
water heater and the balance of 4 foot intervals on the vent
pipe. Venting must be readily accessible for visual inspection
from the rst three feet from the heater.
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