13
Venting Through Closed Spaces
If the vent piping passes through a closed space, wrap the vent
pipe with inflammable insulation material that is at least 3/4”
thick. DO NOT let the insulation material make contact with
flammable materials. A minimum clearance of 3” between the
vent pipe and ceiling should be maintained. Be sure to follow
local codes.
For maintenance and inspection purposes, the following holes
are required to be made.
●
Two (2) inspection openings that allow access to venting.
One (1) of these openings should be close to where the
vent pipe enters the ceiling. The other opening should be
near the vent termination.
●
A ventilation hole with a 16 sq. in. opening should be
made at least every 10 feet.
NOTICE
: Vent pipes must be completely insulated with
inflammable material when installed in alcoves, closets, and
garages and must not touch any flammable material.
Inspection
Hole #1
Inspection
Hole #2
Ceiling
Board
Vent Pipe
Insulation
Material
Wall Thimble
1/4” per foot
downward slope
Vent Adapter
A UL approved 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.
●
Apply 1/4" wide bead of high
temperature silicone (500°F) around
outside of heater collar "B".
●
Slide adapter end "A" down over heater
collar "B" as far as it will go.
●
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
manufacturer’s instructions
A
B
High Temp.
Sealant
Collar
Vent Adapter
Clamp
Water Heater
Exhaust
Flow
Draining the Condensate
In certain conditions, installations in
unconditioned space or having long
horizontal or vertical runs may accumulate
condensate.
In order to prevent condensate from
draining back into the water heater, we
recommend a condensate trap and drain to
be installed in a horizontal vent section as
close as practical to the water heater vent
connection.
Condensate is known to be acidic; refer to
local, state (provincial) or federal codes
for proper handling methods.
