19
WARNING
Use of cellular core PVC for venting fl ue gas could
result in death, serious injury.
!
Table 4 - Combustion air and vent pipe fi ttings
must conform with the following:
Item
Material Standards
Vent Pipe
and Fittings
PVC schedule 40
ANSI/ASTM D1785
PVC - DWV
ANSI/ASTM D2665
CPVC schedule 40
ANSI/ASTM D1784/
F441
SDR-21 & SDR-26 PVC
ANSI/ASTM D2241
ABS-DWV
ANSI/ASTM D2661
Schedule 40
ANSI/ASTM F628
Pipe
Cement/
Primer
PVC ANSI/ASTM
D2564
CPVC
ANSI/ASTM F493
Schedule 40 ABS
ANSI/ASTM D2235
IPEX is approved vent manufacturer in Canada listed
•
to ULC-S636.
IPEX System 636 Cements and Primers are approved
•
in Canada listed to ULC-S636.
DO NOT USE CELLULAR (FOAM) CORE PIPE
6 - COMBUSTION AIR AND VENT PIPING
WARNING
Vent extending through exterior wall shall not
terminate adjacent to wall or below building
extensions such as eaves, balconies, parapets or
decks. Failure to comply could result in death or
serious injury.
!
6.4 Pipe Installation
Minimum and maximum combustion air and vent pipe
•
lengths listed in Table (3). Pipe length counted from
combustion air connector to termination.
Install fi eld-sourced 2" to 3" transition, if used, in vertical
•
section at combustion air inlet and vent connector.
90° elbows equivalent to 5.0 ft (1.6 m). 45° elbows
•
equivalent to 3.5 ft (1.1 m). 2" to 3" transition has no
equivalent length.
Slope vent pipes minimum 1/4" per foot (21 mm/m)
•
back toward boiler. Support horizontal sections to
prevent sags capable of accumulating condensate.
Support piping in accordance with pipe manufacturer's
•
instruction and authority having jurisdiction. In absence
of manufacturer's instruction use pipe hooks, pipe
straps, brackets, or hangers of adequate and strength
located at intervals of 4 ft (1.2m) or less. Allow for
expansion/contraction of pipe.
Combustion air and vent piping must be air tight and
•
water tight.
Certifi ed vent system components must NOT be inter-
•
changed with other vent systems or unlisted pipe/fi ttings.
Canadian installations only. All venting material, primer
•
and glue must be listed to ULC S636.
Canadian installations only. First 3 ft (0.9 m) of
•
plastic vent pipe from vent connector must be readily
accessible for visual inspection.
6.5 Termination
Terminate combustion air and vent pipes with fi ttings or
•
concentric vent kit.
See "Parts, Kits and Optional Accessory" manual for
•
concentric vent kit part numbers.
Use horizontal pipe for vent and 90° elbow for
•
combustion air termination when using fi ttings.
Terminate combustion air and vent pipes in same
•
atmospheric pressure zone through exterior sidewall or
roof.
Locate combustion air termination as far as possible
•
from swimming pool, swimming pool pump house, and
other sources of airborne chlorine.
Locate combustion air and vent as required by authority
•
having jurisdiction.
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