DuraVent FasNSeal Single Wall Wye: an angled connection for a shared boiler vent
The DuraVent FasNSeal Single Wall Wye is a stainless steel fitting that joins a second boiler’s exhaust to a shared vent. Its branch enters at 45 degrees rather than a tee’s 90 degree angle, giving the exhaust less resistance. The appliance maker must approve sharing a vent. All three openings are the same size. Choose from 6, 7, 8, 9, 10, 12, 14, or 16 inch sizes. 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.
Your installer must leave open air around the vent, with spacing based on exhaust temperature. Any enclosure for these sizes must use materials that cannot burn. Keep insulation out of that space and plumbing and wiring away from the vent. Straight single wall pipe can be shortened at its narrow end, leaving at least 2 inches for sealing. The cut must be straight and smoothed. DuraVent prefers an adjustable length, since cutting does not make plain pipe adjustable. Need double wall construction? See the DuraVent FasNSeal W2 Double Wall Wye. The DuraVent FasNSeal Single Wall Wye 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:








































