DuraVent PolyPro Concentric 2" x 4" Black Vertical Termination Extension d21.75 Increases overall thermal efficiency of

Increases overall thermal efficiency of the fireplace

5 Weight 25 lbs Warranty

and maintained in accordance with all applicable codes and the instructions furnished with the appliance

Includes: Round Top

2 Gal Removable Bag

DuraVent PolyPro Concentric 2" x 4" Black Vertical Termination Extension d21.75 Increases overall thermal efficiency ofPolyPro 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