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INSTALLATION INSTRUCTIONS
Equivalent Vent Length Calculation Sheet
Fitting / Termination Type
1) 90
elbow
o
2) 45
elbow
o
3) IPEX Low Profile Termination
4) IPEX 4'' (10.2 cm) Concentric Termination
5) IPEX 3'' (7.6 cm) Concentric Termination
6) 3'' (7.6 cm) Tee Termination
7) 4'' (10.2 cm) Tee Termination
8) 3'' (7.6 cm) Snorkel Termination
9) 4'' (10.2 cm) Snorkel Termination
10) Length of Straight Section in feet
Note: Ensure switch #1 in the tan bank of dip switches is in OFF position if vent length is greater than twenty-one (21) feet (6.4 m).
Pitched Roof Termination Clearances:
Figure 30: Vertical Termination of U-Vent and Combustion
Air Pipe on a Pitched Roof
Exhaust Vent
Combustion Air
12'' (30.5 cm)
above roof or
anticipated
snow level
N O T I C E
DO NOT use lubricant between two (2) PVC/CPVC components.
Refer to cement manufacturer instruction for specific instruc-
tions and handling.
Number of
fittings
NA
12''
(30.5 cm)
min
12''
(30.5 cm)
min
Equivalent Vent
Length
x
5
x
2.5
5
x
20
x
x
20
x
5
x
5
x
10
x
10
40
x
Total (add up
lines 1 through 10
Basic Instructions for Cementing Joints:
1) Cut pipe end square; smooth out jagged edges and burrs.
Chamfer end of pipe; then clean fitting socket and pipe joint
area of all dirt, grease, or moisture.
2) After checking pipe and socket for proper fit, wipe socket and
pipe with cleaner-primer. Apply a liberal coat of primer to in-
side surface of socket and outside of pipe.
3) Apply a thin coat of cement evenly in the socket. Quickly apply
a heavy coat of cement to the pipe and insert pipe into fitting
with a slight twisting motion until it bottoms out.
4) Hold the pipe fitting for thirty (30) seconds to prevent the ta-
pered socket from pushing the pipe out of the fitting.
5) Wipe all excess cement from the joint with a rag. Allow fifteen
(15) minutes before handling. Cure time will vary according to
fit, temperature, and Humidity.
Table 19:
Types of Acceptable PVC/CPVC Elbows for
Venting System
ACCEPTABLE
ACCEPTABLE
90° Elbows,
90° Elbows, Female
Female Unthread-
Unthreaded Socket
ed Socket Ends:
Ends: (1/4 Bend)
(Long Turn) Long
Short Sweep
Sweep
28 28
Total Equivalent
Length
=
=
=
=
=
=
=
=
=
=
NOT ACCEPTABLE
90° Elbows, Fe-
male Unthreaded
Socket Ends: Close
Turn
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