DuraVent FasNSeal W2 88 Degree Elbow: a turn that slopes back toward the drain
The DuraVent FasNSeal W2 88 Degree Elbow is a welded double wall elbow that turns a vent run from vertical to nearly horizontal. Its bend stops 2 degrees short of a square corner, leaving the sideways section tilted toward the drain. That slope helps condensate, the water that forms as exhaust cools, flow back to the drain rather than collect in the pipe. The bend is fixed, not adjustable. 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 size from 3 to 16 inch on this page to match your planned vent run. An experienced professional fits the run using FasNSeal parts and keeps horizontal sections rising at least 1/4 inch per foot so water drains back. A gasket seals each connection, and a locking band holds it together. Each joint takes up 2 inches of length when the ends slide together. Need the single wall version? See the DuraVent FasNSeal 88 Degree Elbow. The DuraVent FasNSeal W2 88 Degree Elbow 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:








































