Simpson Dura-Vent is introducing the PolyPro™, a polypropylene ULC-S636 venting system. Designed for use with condensing appliances, it is corrosion resistant and utilizes EDPM gaskets that enable rapid and adhesive-free assembly, the company says. It is 100 percent recyclable. PolyPro allows for sustained flue gas temperatures of up 248°F and is available in 2- through 6-inch diameters.

Simpson Dura-Vent Co. Inc., 877 Cotting Ct., P.O. Box 1510, Vacaville, CA 95696-1510; 800-835-4429;