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2. Align the pipe with the pipe fitting and twist
the pipe a quarter turn as you insert it into the
fitting. Twisting the pipe spreads the solvent
cement evenly to ensure a solid joint.
3. Hold the pipe and pipe fitting together for
about 15 seconds until the cement sets.
Use approved solvent type cement
Note
●
for the proper vent materials.
Use solvent type cement only.
●
Check the date of manufacture
●
before using the cement. Ensure that
cement was not manufactured more
than 2 years prior to using it.
Ensure that the inside of the pipe
●
fitting and the outside of the pipe,
where cement will be applied, is
clean.
Apply an even layer of cement over
●
all mating surfaces.
Use primer in temperatures lower
●
than 32℉ (0℃).
Use solvent cement in room
●
temperatures higher than 32℉ (0℃).
Installing vent pipe with cement
●
in cold ambient temperatures can
result in longer cure times.
WARNING
Carbon Monoxide Hazard
To prevent serious injury or death:
NEVER apply force or impact to pipes after
●
making connections.
Excessive force might cause the pipe or fitting
●
to leak harmful gas.
9.1.2 Determining the Length of a
Common Vent System
Follow the instructions listed below to determine
the length of a common vent.
1. Add the BTU/H input ratings for each unit in the
cascading system to determine the total BTU/H
rating.
2. Determine the total length (L) of the common
vent, which consists of the horizontal width (W)
and the vertical height (H): Total length (L) = W
+ H.
H
W
Siphon loop
Drain hose
Installing a Common Vent System
Exhaust
D
Intake
Drain
81
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