DuraVent FasNSeal Patterson Kelley Mach Series Appliance Adapter: connects a FasNSeal vent to listed Mach boilers
The DuraVent FasNSeal Patterson Kelley Mach Series Appliance Adapter is an adapter that joins a boiler’s flue outlet, where exhaust leaves, to a FasNSeal vent. It makes that connection when the outlet is not built to accept FasNSeal directly. DuraVent lists this part for Patterson Kelley Mach boilers C-300, C-450, C-900, and C-1050. 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 one of the three sizes shown on this page. FasNSeal sizing refers to the opening inside the vent, and that size should match the appliance’s flue outlet. Check both the boiler model and its outlet size before ordering, since this adapter is not the one DuraVent lists for every Mach boiler. Have a C-750? That model takes the DuraVent FasNSeal Tapered Patterson Kelley Mach Series Appliance Adapter instead. The DuraVent FasNSeal Patterson Kelley Mach Series Appliance Adapter ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.








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