For PP, use the transition / adapter fitting (Sch 40 to PP)offered by the respective PP
manufacturers Centrotherm / Innoflue™ (their part #ISAA0303 or #ISAA0404) or M&GDura Vent /
PolyPro™ (#3PPS-AD), (#4PPS-AD) or Z-Flex/Z-DENS(#2ZDCPVCG3).
PVC/CPVCCombustion air piping - if used - is inserted directly into the 3" or 4" connector.
For PP material exposed to outdoor conditions, follow the venting supplier’s recommendations on
UV protection.
Warning
Ensure that you lubricate the gasket with silicone grease before inserting the venting
material. Fully insert the approved venting material into the boiler's exhaust outlet, and
tighten clamp to ensure the venting connection is locked in place (as shown above).
*Manufacturers of stainless steel Type BH venting systems must submit their approved transition
fitting to IBC for evaluation and written approval.
Figure 9 Securing vent connection
Warning
Do not mix PP venting materials from different manufacturers. These venting materials
are designed to be installed as part of a complete system. Failure to comply may result in
severe personal injury or death.
3.6 Installation clearances
Warning
Exposed water piping and associated components (relief valves, circulators, etc.,)
should not be in contact with combustible materials. Check local codes for required
clearances and / or provide adequate insulation.
3.6 Installation clearances
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