DuraVent FasNSeal Tee Cap: a removable closure for checking inside a tee
The DuraVent FasNSeal Tee Cap is a stainless steel cap that closes the bottom opening of a standard tee, branch tee, or boot tee. It comes off so an installer can check inside and remove debris or condensate, the liquid that collects from the exhaust. There is one important exception: the bottom of a vertical vent stack needs a drain fitting instead of this cap. FasNSeal is DuraVent’s stainless steel vent for high efficiency gas boilers, furnaces, and water heaters, built to carry pressurized exhaust and its acidic condensate outside.
Choose a size from 3 to 16 inch to match the tee. The wider end has a gasket to seal the connection and a built in band to lock it together. Allow for overlap when planning the run: each joint takes up 2 inches, so a 6 inch pipe length adds 4 inches to the run. Using double wall vent? See the DuraVent FasNSeal W2 Tee Cap for double wall vent. The DuraVent FasNSeal 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:








































