DuraVent FasNSeal Weil McLain Ultra Series Appliance Adapter: connects a FasNSeal vent to an Ultra Series boiler
The DuraVent FasNSeal Weil McLain Ultra Series Appliance Adapter is an adapter that joins a FasNSeal vent to a boiler’s exhaust outlet. DuraVent lists it for Ultra Series boilers in 3 or 4 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. The 3 inch also fits Weil McLain GV90 and Triangle Tube Prestige Solo 110 and Solo 250 boilers. The 4 inch also fits Aerco Esteem 399, Raypak XFyre 300, 400, and 500, and Triangle Tube Prestige Solo 399 boilers.
Choose 3 or 4 inch on this page. FasNSeal serves natural gas or propane appliances that call for special gas venting. The appliance maker determines the allowed vent route and length. The pipe needs hangers and wall brackets for support, plus firestops where it passes through floors or ceilings. Looking for the GV Series connection? See the DuraVent FasNSeal Weil McLain GV Series Appliance Adapter. The DuraVent FasNSeal Weil McLain Ultra Series Appliance Adapter 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:








































