DuraVent 6 in. Dia to 7 in. Gas Vent Increaser

Type B Gas Vent designed to the demands of the common category I appliance installation. Engineered to heat up rapidly and remain hot during the appliance operation to allow for minimal condensation. An innovative system for a lock tight connection called DuraLock.|Use with natural gas and liquified propane (LP) category I appliances with a draft hood|Allows a 6 in. Dia b-vent run to be increased to 7 in. for added draft|Aluminum inner wall and galvalume outer wall construction that features an industry leading twist-lock design|1 in. clearance to combustibles in a single or multi-family dwelling applications