1/4” per foot | Wall Thimble | |
downward slope | ||
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Vent Pipe
Ceiling
Board
Inspection | Inspection |
Access Panel #1 | Access Panel#2 |
Venting Through Closed Spaces
If the vent piping passes through a closed space, a minimum clearance of 8” (20 cm) when installed horizontally, 6” (15 cm) when installed vertically should be maintained between the vent pipe and combustibles and noncombustibles. Be sure to follow local codes.
For maintenance and inspection purposes, the following access panels are required.
●Two (2) inspection access panels large enough to allow access for venting inspection. One (1) of these access panels should be close to where the vent pipe enters the ceiling. The other access panel should be near the vent termination.
●A ventilation access panel with a 16 in2 (103 cm2) opening should be provided every 10 ft (3 m).
Exhaust
Flow
A
High Temp.
Sealant 
B
Vent Adapter RTG20002B
Clamp
Collar
Vent Adapter
A UL 1738 approved stainless steel vent adapter is required for vent connection.
Read the following instructions before installation.
● Test fit the adapter over the water |
heater collar before proceeding. Adjust |
clamp as needed. |
● With an alcohol wipe, clean inside |
surface "A" of adapter and outside |
surface of "B" of heater collar. |
●Tighten the clamp around the collar.
●Inspect the inside of the adapter to verify that the collar and adapter are sealed. If more sealant is required, apply sealant to a flat tool, then spread around the collar edge on inside of adapter.
●Ensure that the clamp does not interfere with the damper shaft.
NOTICE: Follow the vent adapter
Water Heater
● Apply 1/4" (6 mm) wide bead of high |
temperature silicone (500°F) (260°C) |
around outside of heater collar "B". |
● Slide adapter end "A" down over heater |
collar "B" as far as it will go. |
manufacturer’s instructions
Draining the Condensate
In order to prevent condensate from draining back into the water heater, a condensate trap and drain must be installed in a horizontal vent section as close as practical to the water heater vent connection, uless the water heater is vented horizontally with a 1/4” per foot DOWNWARD slope towards the vent terminal as shown below.
Condensate is known to be acidic; refer to local, state (provincial) or federal codes for proper handling and discharge methods.
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| 1/4” per foot downward slope |
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| 3” (8 cm) Clearance |
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| 3’ |
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| (91 cm) |
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14 | Max |
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