DuraVent FasNSeal W2 Tapered Reducer: a gradual step down to a smaller vent size
The DuraVent FasNSeal W2 Tapered Reducer is a cone shaped double wall fitting that connects a larger vent section to a smaller one. It sits where the run changes size, narrowing gradually rather than making an abrupt step. 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. This fitting carries the exhaust through that change while keeping the run double wall.
Choose an 8 to 7 inch or 10 to 7 inch reducer on this page. Both connect to a 7 inch section at the smaller end, so the choice is the larger end’s size. The appliance maker sets the allowed length and direction of the vent run. An experienced professional fits the run using FasNSeal parts throughout. Need the single wall fitting? See the DuraVent FasNSeal Tapered Reducer single wall fitting. The DuraVent FasNSeal W2 Tapered Reducer 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:








































