DuraVent PolyPro Reducer: steps the vent down to a smaller size
The DuraVent PolyPro Reducer is a fitting that joins a larger vent section to a smaller one. It goes where the vent changes size, with a different size opening at each end. PolyPro is DuraVent’s polypropylene vent pipe for high efficiency condensing gas boilers, furnaces, and water heaters. These appliances send out cool, wet exhaust that forms acidic liquid as it condenses. The gray plastic pipe does not corrode from that liquid.
Choose a 3 to 2, 4 to 3, 5 to 4, 6 to 5, or 8 to 6 inch reducer. The size choices on this page show the larger end, so choosing 3 inch gets you the 3 to 2 inch fitting. One locking clamp is included. At a PolyPro joint, the narrow end slides into the wider end over a rubber gasket, with 2 inches of overlap. The clamp holds the exhaust joint together. Only soapy water should be used on the gasket, not petroleum grease. Need to go larger instead? See the DuraVent PolyPro Increaser fitting. The DuraVent PolyPro Reducer ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 3PPS-R2L | 4PPS-R3L | 5PPS-R4L | 6PPS-R5L | 8PPS-R6
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
3”-2” (80mm–60mm) | 4”-3” (100mm–80mm) | 5”-4” (130mm–100mm) | 6”-5” (150mm–130mm) | 8”-6” (200mm–150mm)
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