DuraVent FasNSeal W2 Tee Cap: a removable bottom cap for inspection and cleaning
The DuraVent FasNSeal W2 Tee Cap is a double wall cap that closes the open bottom of a W2 tee or boot tee. It comes off so a professional can check inside the vent and clear out debris. It is not a drain. At the base of a vertical stack, a W2 drain fitting takes its place to let collected liquid out. 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 the tee it will close. The connection seals with a gasket and holds together with a locking band built into the wider end. An experienced professional fits the vent run using FasNSeal parts throughout. Need a cap for a single wall tee? See the DuraVent FasNSeal Tee Cap for single wall vent. The DuraVent FasNSeal W2 Tee 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:








































