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Vitodens Rigid and Flex Venting Systems Installation
General Installation Information
(continued)
Approved materials for two-pipe system
Part
Material
Certified to Standards
Applicability
Exhaust pipe and
fitting
Stainless steel
UL1738 “Venting systems for gas-burning appliances,
Categories II, III, IV”
U.S.A./Canada
ULC S636 “Standard for Type BH gas venting systems”
CPVC
UL1738 “Venting systems for gas-burning appliances,
Categories II, III, IV”
ULC S636 “Standard for Type BH gas venting systems”
Class IIB 90°C
Polypropylene
PP(s)
UL1738 “Venting systems for gas-burning appliances,
Categories II, III, IV”
ULC S636 “Standard for Type BH gas venting systems”
Class IIC 110°C
Combustion air pipe
and fitting
Stainless steel
n.a.
PVC-DWV
Schedule 40
ANSI/ASTM D2661
CSA B181.1
ULC S102.2
ANSI/ASTM D2665, D1785
CSA B137.3, B181.2
ANSI/ASTM F441
CPVC
Schedule 40
ANSI/ASTM D2661
CSA B181.1
ULC S102.2
ANSI/ASTM D2665, D1785
CSA B137.3, B181.2
ANSI/ASTM F441
ABS-DWV
Schedule 40
ANSI/ASTM D2661
CSA B181.1
ULC S102.2
ANSI/ASTM D2665, D1785
CSA B137.3, B181.2
ANSI/ASTM F441
Polypropylene
PP(s)
UL1738 “Venting systems for gas-burning appliances,
Categories II, III, IV”
ULC S636 “Standard for Type BH gas venting systems”
Class IIC 110°C
Pipe cement, primer
(for combustion air
intake pipe)
PVC
ANSI/ASTM D2564
CSA B137.3
CPVC
ANSI/ASTM F493
CSA B137.6
ABS
ANSI/ASTM D2235
CSA B181.1/B182.1
Pipe cement, primer (for
exhaust pipe and fitting)
CPVC
ULC S636 “Standard for Type BH gas venting systems”
Class IIB 90°C
CAUTION
On the job site, ensure that non-listed combustion air
pipe materials are not inadvertently used instead of
listed vent pipe material.
CAUTION
Do not use PVC material in exhaust system.
Direct Venting (Two-pipe System)
Note:
Always use the latest edition of the applicable standard.
CAUTION
Do not use cellular (foam) core pipe material to vent
this Vitodens boiler.