The Master Flow 4 in. Goose Neck Vent is designed for 4 in. round pipe or flexible duct. This vent is designed for venting appliances through your roof. It's made of zinc-coated galvanized steel for durability and reliability. This vent features a heavy-duty screen that helps protect against small animals from entering your home and a damper to help prevent backdraft.
Heavy duty screen for protection against small animal entry
28-gauge galvanized-steel construction
Works well on all pitched roofs
Ample flashing for added leak protection
Install using appropriate roofing nails (sold separately)
Always seal flashing with approved roof sealant
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