DuraVent PolyPro 4

This category focuses on 4 inch polypropylene condensing-appliance venting in the DuraVent PolyPro product line, organized so you can compare the details that affect fit. DuraVent PolyPro is designed for approved high-efficiency gas appliance exhaust applications, including certain condensing boilers, furnaces, and water heaters.

Look beyond the product name: confirm correct series, 4 inch nominal size, listed appliance application, fitting type, and mounting or termination requirements. The DuraVent PolyPro label identifies a particular product family. Nominal size alone does not establish compatibility with other brands or other venting designs.