DuraVent PolyPro B Vent Retrofit Adapters: reuse an old metal vent as a liner sleeve
The DuraVent PolyPro B Vent Retrofit Adapters is a set of adapters for putting a flexible liner inside an existing B vent. That metal vent from a mid efficiency appliance becomes a sleeve for PolyPro Flex when you switch to a condensing appliance. PolyPro is DuraVent’s polypropylene vent pipe for high efficiency condensing gas boilers, furnaces, and water heaters. This setup serves just one appliance. DuraVent approves it in Canada. In the USA, approval must come from the appliance maker. You get an adapter for the top cap and a support cup for the bottom. Choose 2 inch flex with a 3, 4, 5, or 6 inch B vent, or 3 inch flex with a 5 or 6 inch B vent.
Both liner ends need a flex gasket in the first complete groove beside the cut. Each flex fitting closes with two locking tabs. Gaskets take only soapy water, not petroleum grease. Plastic vent cannot cross a fire rated wall or floor, and DuraVent recommends yearly vent checks. Need the cap above? See the DuraVent PolyPro Vertical Flex Termination Cap for the top. The DuraVent PolyPro B Vent Retrofit Adapters ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 2PPS-BV3 | 2PPS-BV4 | 2PPS-BV5 | 3PPS-BV5 | 2PPS-BV6 | 3PPS-BV6
Applications
PolyPro is a polypropylene vent pipe for use with ANSI Category II and IV gas-burning appliances, including highefficiency water heaters, condensing boilers and warm air furnaces. Poly Pro is listed by Intertek to the ULC S636 standard in Canada as a Class IIA, IIB and IIC vent system suitable for exhaust temperatures up to 230°F / 110°C, 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 Viton gaskets.
Clearances
General: 0″ clearance to combustibles for exhaust temperatures up to 194°F / 90°C.
Vertical Installations: 0″ clearance for vertical installations up to exhaust temperatures of 230°F / 110°C.
Horizontal Installations: ¼” / 6mm clearance to combustibles for horizontal installations at exhaust temperatures up to 230°F / 110°C.
Concentric vent system components, including Horizontal and Vertical Terminations: 0″ clearance to combustibles for exhaust temperatures up to 230°F / 110°C.
Diameters
5” (130mm) | 6” (150mm) | 8” (200mm)
Listings
Listed with the appliance in the USA, check with appliance manufacturer. Intertek / ETL listed to ULC-S636 Listed as a Class IIA, IIB, and IIC vent system.
Previously the CSA certification trademark was shown in error in conjunction with the PolyPro product – references have been removed.
Videos
Newly Designed PolyPro® Locking Clamps Video
PolyPro® Double-Wall Video
Why Polypropylene? DuraVent’s PolyPro® Venting System Video