DuraVent PelletVent Pro Vent Pipe Storm Collar - 4" Inner Diameter - 4PVP-SC Venting Requirements: This unit necessitates a venting pipe with a 4" inner diameter. Dura-PelletVent Vent's Pro Chimney Vent Pipe Storm Collar is for 4" inner diameter chimney pipes. During rainy weather, the storm collar produces an airtight waterproof seal to provide the finest moisture defense possible, as well as additional protection between your ventilation pipe and flashing. This storm collar is composed of robust aluminum and has a laser welded double wall structure with an inner wall of .012" stainless steel and an outside wall of .018" galvalume.

Creates weather-resistant seal between vent piping and flashing Fits PelletVent Pro vent pipes with a 4" inner diameter Limited lifetime warranty