DuraVent FasNSeal Triangle Delta Series Appliance Adapter: connects a vent to Delta Performance appliances
The DuraVent FasNSeal Triangle Delta Series Appliance Adapter is an adapter that joins a FasNSeal vent to an appliance’s flue outlet. DuraVent lists this 3 inch part for the Triangle Tube Delta Performance and Delta Performance Plus. It bridges the connection when the appliance outlet is not made to accept FasNSeal directly. 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 size measures the opening inside the vent, not the width across its outside. That size should match the appliance’s flue outlet, so check the outlet size before ordering. Have a Triangle Tube Prestige boiler instead? DuraVent lists those boilers for the DuraVent FasNSeal Weil McLain Ultra Series Appliance Adapter. The DuraVent FasNSeal Triangle Delta 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:








































