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Hart and Cooley 016314 is a double-wall round gas vent increaser that adapts 6-inch Type B gas vent to 7-inch vent. It features a corrosion-resistant 0.012 inch aluminum inner wall, a 0.018 inch G90 galvanized steel outer wall, and a 5-1/4 inch overall length. The fitting uses a deep locking groove and locking tabs/band for a positive-fit joint and meets UL 441 for Category I, negative pressure applications with flue gas temperatures up to 400 F above ambient.
Double-wall Type B gas vent increaser, 6 in to 7 in, 5-1/4 in length, UL 441 listed, secure locking band connection
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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