DuraVent FasNSeal W2 Rain Cap: keeps rain out of a vent above the roof
The DuraVent FasNSeal W2 Rain Cap is a double wall cap for the top of a W2 vent that ends above the roof. It keeps rain from entering the vent. When the vent needs inspection, the cap can be removed by loosening its band. FasNSeal W2 is DuraVent’s double wall stainless steel vent for high efficiency gas boilers, furnaces, and water heaters, with an air space between its two walls. Choose a cap size from 3 to 16 inch on this page to match your vent size.
For the roof flashing, the piece that covers the opening around the vent, order the same size as the vent. W2 connections seal with a gasket and secure with a locking band built into the wider end. Each connection takes up 2 inches of pipe length, and W2 pipe cannot be cut to fit on the job. Those details matter when planning the lengths needed for the run. Have a single wall vent instead? See the DuraVent FasNSeal Rain Cap for single wall vents. The DuraVent FasNSeal W2 Rain Cap ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.












Commercial projects may require custom parts and unique system designs. Duravent offers complete project assistance:








































