DuraVent FasNSeal Standard Tee: a turn into the stack with room for a drain
The DuraVent FasNSeal Standard Tee is a stainless steel fitting where a horizontal vent turns upward into a vertical stack. Its lower opening takes a drain fitting for liquid from the exhaust, or a removable tee cap for cleaning access. Both are sold separately. DuraVent allows a tee only with a drain or for joining appliances into one vent when their maker approves it. 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 3 to 16 inch size on this page. FasNSeal serves natural gas or propane appliances that call for a special gas vent. As the exhaust cools, it releases acidic liquid called condensate. Unless the appliance has its own drain, a FasNSeal drain belongs close to it. Drains also go at each stack’s base and every 30 feet of horizontal vent. The drain hose needs a loop to trap liquid, and drains stay indoors in cold climates. Need double wall venting? See the DuraVent FasNSeal W2 Standard Tee double wall fitting. The DuraVent FasNSeal Standard Tee ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.








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