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mrcool.com
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Selecting Vent Pipe Materials
Venting requirements differ in the U.S. and Canada. Consult the following chart, or the
most recent edition of ANSI Z223.1/NFPA 54 or CAN?CGA B149.1, as well as all applicable
local codes and regulations when selecting vent pipe materials.
DO NOT
use cellular core PVC (ASTM F891), cellular core CPVC, or Radel (polyphenolsulfone) for
the exhaust vent.
WARNING
DO NOT
mix components from different systems. The vent system could fail and harmful
elements from the flue could leak into the living space. In the event this occurs, it could
cause serious personal injury or death.
• Mixing of vent materials WILL VOID THE WARRANTY
and certification of the appliance.
• PVC/CPVC Schedule 40 or 80 (Solid Core)
• Approved Polypropylene (PP)
• Type BH Special Gas Vent Class IIA (PVC)
• Type BH Special Gas Vent Class IIB (CPVC)
• Type BH Special Gas Vent Class IIC (Polypropylene/Stainless Steel)
Location
USA
Canada*
Recommended Vent Materials
*For Installation in Canada, field-supplied plastic vent piping must comply with CAN/CGA B149.1
(latest edition) and be certified to the Standard for Type BH Gas Venting Systems, ULC-S636.
Components of this listed system must not be interchanged with other vent systems or unlisted
pipes or fittings. All plastic components and specified primers & glues of the certified vent system
must be from a single system manufacturer and must not be intermixed with another system
manufacturer’s parts.
NOTE: The supplied vent connector and vent termination are certified as part of the water heater.
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