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 high quality aluminum 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
Works well on all pitched roofs
Ample flashing for added leak protection
Insall using appropriate roofing nails
Always seal seams with code approved mastic or sealant (or duct tape)
Aluminum construction
Always seal flashing with approved roof sealant
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