DuraVent FasNSeal Wide Mouth Boot Tee: a gentler turn from sideways to upward
The DuraVent FasNSeal Wide Mouth Boot Tee is a stainless steel fitting that joins a horizontal vent section to a vertical one. Its side opening widens into an angled passage instead of meeting the upright section at a square corner. That gives the exhaust a more gradual turn with less resistance than a standard tee. It also accepts a tee 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. It serves natural gas or propane appliances whose makers call for a special gas vent.
Choose your vent size on this page, from 4 to 16 inch. This tee can also connect boilers to a shared vent, but only when the appliance maker permits that arrangement. Single wall FasNSeal needs an open air gap from wood and other materials that can burn. The required gap depends on the appliance’s exhaust temperature, and insulation must stay out of that space. Need the double wall version? See the DuraVent FasNSeal W2 Wide Mouth Boot Tee, a double wall fitting. The DuraVent FasNSeal Wide Mouth Boot Tee ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.








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