DuraVent® PolyPro® Flex 4PPS-FLEX Flexible Vent Pipe, Polypropylene, 4 in Diax82 ft L

PolyPro Flex through B Vent as a Chase: Retrofit venting for new, high-efficiency appliances. When replacing a mid-efficiency appliance with a new condensing 90+ appliance, you can use the existing B vent (any brand) as a chase for the new appliance with PolyPro. The perfect solution for utilizing the B Vent already in place, use the convenient pull cone to insert double-wall PolyPro Flex through the B Vent pipe and terminate in either a two pipe or single pipe system. At the other end is the unique B Vent/Polypro Support Cap, allowing for the connection of flex to rigid PolyPro lengths and elbows to finish the installation.

DuraVent® PolyPro® Flex Vent Pipe, Flexible, 4 in Dia, 82 ft Length, Polypropylene