DuraVent 2" x 4" Adjustable Black Roof Flashing 5/12 - 12/12 Pitch

Use to weather proof penetration of vent through the roof. For concentric pipe. made of polypropylene. Adjusts from 25° to 45° (5/12 to 12/12). Black or Terra-Cotta. UV resistant. PolyPro. is engineered for use with category II and IV condensing gas/oil appliances and heating equipment, including tankless water heaters, high efficiency water heaters, condensing boilers and warm air furnaces. Application PolyPro is a polypropylene vent pipe for use with ANSI Category II and IV gas-burning appliances, including high efficiency water heaters, condensing boilers and warm air furnaces. PolyPro is listed by Intertek to the ULC SC636 standard in Canada as a Class IIA, IIB and IIC vent system suitable for exhaust temperatures up to 230F / 110C, and a maximum positive pressure of 15 in-w.c. Materials and Construction Rigid pipe constructed of 2.2mm (minimum) thick polypropylene. Flex is double-wall polypropylene. EPDM or optional Viton Gaskets. Clearances 0" clearance to combustible for exhaust temperatures up to 1...