Account SelectorCan polypropylene be used on this direct vent water heater - RHE40S?
Per the installation manual as of 05/25/2021, Polypropylene is not an approved (listed) product.
NOTICE: This water heater is approved to use the following materials for vent and combustion air-inlet systems:
PVC (Schedule 40, Cellular Core, ASTM-F891)
PVC (DWV, ASTM-D2665)
PVC (Schedule 40, ASTM-D1785)
PVC (SDR Series, ASTM-D2241)
CPVC (CPVC 4120, ASTM-D2846)
CPVC (Schedule 40, ASTM-F441)
CPVC (SDR Series, ASTM-F442)
ABS (Schedule 40, DWV, ASTM-D2661)
ABS (Schedule 40, DWV, Cellular Core, ASTM-F628)
