Approved Materials For Two-Pipe System - Viessmann Vitocrossal 300 CU3A Installation Instructions Manual

Direct Venting (Two-pipe System)
General Installation Information

Approved materials for two-pipe system

Part
Exhaust pipe and
fitting
Combustion air pipe
and fitting
Pipe cement, primer
(for combustion air
intake pipe)
Pipe cement, primer (for
exhaust pipe and fitting)
Note: Always use the latest edition of the applicable standard.
CAUTION
Do not use cellular (foam) core pipe material to vent
this Vitocrossal 300 CU3A boiler.
CAUTION
Do not use PVC material in exhaust system.
26
(continued)
Material Certified to Standards
Stainless steel UL1738 "Venting systems for gas-burning appliances,
Categories II, III, IV"
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 UL1738 "Venting systems for gas-burning appliances,
PP(s) Categories II, III, IV"
ULC S636 "Standard for Type BH gas venting systems"
Class IIC 110°C
Stainless steel n.a.
PVC-DWV ANSI/ASTM D2661
Schedule 40 CSA B181.1
ULC S102.2
ANSI/ASTM D2665, D1785
CSA B137.3, B181.2
ANSI/ASTM F441
CPVC ANSI/ASTM D2661
Schedule 40 CSA B181.1
ULC S102.2
ANSI/ASTM D2665, D1785
CSA B137.3, B181.2
ANSI/ASTM F441
ABS-DWV ANSI/ASTM D2661
Schedule 40 CSA B181.1
ULC S102.2
ANSI/ASTM D2665, D1785
CSA B137.3, B181.2
ANSI/ASTM F441
Polypropylene UL1738 "Venting systems for gas-burning appliances,
PP(s) Categories II, III, IV"
ULC S636 "Standard for Type BH gas venting systems"
Class IIC 110°C
PVC ANSI/ASTM D2564
CSA B137.3
CPVC ANSI/ASTM F493
CSA B137.6
ABS ANSI/ASTM D2235
CSA B181.1/B182.1
CPVC ULC S636 "Standard for Type BH gas venting systems"
Class IIB 90°C
CU3A Venting Systems Installation
CAUTION
On the job site, ensure that non-listed combustion air
pipe materials are not inadvertently used instead of
listed vent pipe material.
Applicability
U.S.A./Canada