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When a vent is less than 10 feet high, the vent should be at least as large as the flue collar outlet.b) Vents for draft hoods or flue collars 12 inches in diameter or less should NOT be reduced more than one pipe size.
Multiple product options available. Each of these Type B gas vent pipe kits includes a cap, storm collar, flashing, draft hood connector, and 12 adjustable length. Most installations require additional pipe lengths and an adjustable 90Â° L connector.