Install Instructions

18
3 General venting
PVC/CPVC:
DIR #2000528318 00
AIR
VENT
Figure 3-7 Near Boiler PVC/CPVC Venting
When transitioning from 2" to 3" vent
diameter, a 2" pipe section and 2" to 3"
increaser are required to be CPVC when
PVC/CPVC vent is used.
⚠WARNING
Examples: 1. Seven (7) feet vertical
2. Connector + 90° elbow + 2 feet horizontal
3. One (1) foot vertical + 90° elbow + 1 foot
horizontal
Installing vent and air piping
Use only cleaners, primers, and solvents that
are approved for the materials which are
joined together.
NOTICE
1. Work from the boiler to vent or air termination. Do
not exceed the lengths given in this manual for the air
or vent piping.
2. Cut pipe to the required lengths and deburr the inside
and outside of the pipe ends.
3. Chamfer outside of each pipe end to ensure even
cement distribution when joining.
4. Clean all pipe ends and fittings using a clean dry rag.
(Moisture will retard curing and dirt or grease will
prevent adhesion.)
5. Dry fit vent or air piping to ensure proper fit up before
assembling any joint. The pipe should go a third to
two-thirds into the fitting to ensure proper sealing after
cement is applied.
6. Priming and Cementing:
a. Handle fittings and pipes carefully to prevent
contamination of surfaces.
b. Apply a liberal even coat of primer to the fitting
socket and to the pipe end to approximately 1/2"
beyond the socket depth.
c. Apply a second primer coat to the fitting socket.
d. While primer is still wet, apply an even coat of
approved cement to the pipe equal to the depth of
the fitting socket along with an even coat of
approved cement to the fitting socket.
e. Apply a second coat of cement to the pipe.
f. While the cement is still wet, insert the pipe into
the fitting, if possible twist the pipe a 1/4 turn as
you insert it. NOTE: If voids are present,
sufficient cement was not applied and joint could
be defective.
g. Wipe excess cement from the joint removing ring
or beads as it will needlessly soften the pipe.
Table 3D PVC/CPVC Vent Pipe, and Fittings
All PVC vent pipes must be glued, properly
supported, and the exhaust must be pitched
a minimum of a 1/4 inch per foot back to the
boiler (to allow drainage of condensate).
NOTICE
⚠WARNING
Use only the vent materials, primer, and
cement specified in Table 3D to make the
vent connections. Failure to follow this
warning could result in fire, personal injury,
or death.
⚠WARNING
Insulation should not be used on PVC
or CPVC venting materials. The use of
insulation will cause increased vent wall
temperatures, which could result in vent pipe
failure.
This product has been approved for use with the PVC/CPVC
vent materials listed in Table 3D.
NOTE: In Canada, CPVC and PVC vent pipe,  ttings and cement/
primer must be ULC-S636 certi ed.
For installations using 2" vent, the first seven
(7) equivalent feet of vent must be CPVC
(field supplied). See examples below.
⚠WARNING
Installation & Service Manual
FIRE TUBE
™
Approved PVC/CPVC Vent Pipe and Fittings
Item Material Standard
Vent pipe
PVC Schedule 40, 80 ANSI/ASTM D1785
PVC - DWV ANSI/ASTM D2665
CPVC Schedule 40, 80 ANSI/ASTM F441
Vent fittings
PVC Schedule 40 ANSI/ASTM D2466
PVC Schedule 80 ANSI/ASTM D2467
CPVC Schedule 80 ANSI/ASTM F439
PVC - DWV ANSI/ASTM D2665
Pipe Cement /
Primer
PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
NOTICE: DO NOT USE CELLULAR (FOAM) CORE PIPE
⚠CAUTION
Allow for all primers, glues, and cements
to fully cure before start-up. Failure to
follow this warning could result in property
damage and/or personal injury.