DuraVent PolyPro Concentric 3" x 5" Adapter Increaser not Ready for QA Metal Grate & 8 lbs

Metal Grate & 8 lbs of Lava Rock

Elbows are used for rigid and outside diameter "OD" flex pipe or for inside diameter "ID" flex pipe in a multitude of degrees

Required to cover the insulation at the top of the chimney if any termination other than Selkirk Round Top is used

Double-wall factory-built Chimney Systems for use with gas

DuraVent PolyPro Concentric 3" x 5" Adapter Increaser not Ready for QA Metal Grate & 8 lbsPolyPro Concentric provides users the most versatile polypropylene venting system for high efficiency, condensing appliances. The injection molded modular system is designed with a powder coated aluminum outer pipe and a polypropylene inner pipe. It does not require a locking band and provides users with a fast, safe, clean, and sustainable venting solution. The PolyPro Concentric system also includes elbows that have a smooth wall lining and are