BVDS4BK – FAMCO 4-Inch Black Roof Vent

BVDS4BK Reliable 4-Inch Black Roof Vent

BVDS4BK is a 4-inch black plastic roof vent designed for bathroom fan, kitchen fan, range hood and other forced-air exhaust applications. Manufactured by FAMCO, this roof vent provides a practical termination point for compatible ventilation ducts while helping protect the opening from outdoor elements, birds and many insects.

This model is manufactured from high-density polyethylene and contains UV inhibitors that help protect the material from deterioration caused by sunlight. Its durable black construction offers dependable outdoor performance while providing a clean appearance on compatible roofing systems.

BVDS4BK Durable Roof Vent Construction

The BVDS4BK is made from high-density polyethylene, commonly known as HDP. This versatile plastic material provides durability without the additional weight associated with many metal roof vent products. UV and antioxidant additives help preserve the material and its black color during outdoor exposure.

The vent is designed for connection to a compatible 4-inch ventilation duct. Before ordering, verify the duct diameter, roof construction, roof pitch and available installation space. Correct sizing is important for maintaining proper airflow and creating a secure connection between the exhaust duct and roof vent.

Built-In Backdraft Damper

The BVDS4BK includes a built-in damper that helps reduce unwanted backdraft when the connected exhaust fan is not operating. A backdraft damper can help limit the movement of outside air through the duct and into the building.

Damper operation depends on correct positioning and installation. The vent should be installed so the damper can move freely without interference from roofing materials, fasteners, insulation or debris. Regular inspection helps ensure that the damper continues to open and close correctly.

Bird Screen and Removable Stem

The BVDS4BK includes a built-in 1/4-inch screen designed to help prevent birds and many insects from entering the vent opening. The screen provides additional protection while allowing exhaust air to exit through the roof.

The screen may be removed when the product is used as a rooftop dryer vent. However, the manufacturer indicates that the screen is not designed to be reinserted after removal. Always verify applicable dryer manufacturer instructions and local requirements before selecting or modifying a roof termination.

This roof vent also includes a removable bottom stem. The stem supports standard duct connections and may be removed for compatible hard-connect applications. Any connection should be properly secured and sealed according to the roofing material, ventilation system and local building requirements.

Bathroom and Kitchen Applications

The BVDS4BK is suitable for compatible bathroom exhaust fans, kitchen exhaust fans, range hoods and forced-air ventilation systems. By terminating exhaust air above the roof, it can help remove humidity, odors and airborne moisture from interior spaces.

This product is intended for ventilation exhaust applications. It is not designed as a combustion flue, chimney cap or termination for gas-fired heating equipment. Never connect it to a furnace, water heater, fireplace or another appliance that produces hot combustion gases.

Roof Compatibility and Installation

The BVDS4BK is recommended by the manufacturer for compatible pitched, tile or shingle roofs. It is not recommended for flat rubber roofing. Confirm roof compatibility before cutting an opening or beginning installation.

Correct installation is essential for protecting the roof from water intrusion. The vent base should be integrated with the roofing material using suitable flashing and sealing methods. Fasteners and sealants must be appropriate for the roof type and local weather conditions.

Professional installation is recommended. A qualified installer can verify the duct size, roof pitch, airflow requirements, flashing method and exterior clearances. The vent should not be positioned where snow, leaves or nearby structures may obstruct airflow.

Inspection and Maintenance

Inspect the BVDS4BK periodically for leaves, dust, nests and other debris. Confirm that the exterior hood remains secure, the damper moves freely and the duct connection has not separated. The surrounding roof area should also be checked for signs of damaged roofing or failed sealant.

Cleaning frequency depends on the application and local environment. Kitchen exhaust systems may require more frequent inspection because airborne grease can accumulate inside the duct and vent. Always turn off the connected equipment before performing maintenance.

Product Features

• Manufacturer model: BVDS4BK
• Brand: FAMCO
• Designed for a compatible 4-inch duct
• Black high-density polyethylene construction
• UV inhibitors help protect against sunlight deterioration
• Built-in backdraft damper
• Built-in 1/4-inch bird and insect screen
• Removable bottom connection stem
• Suitable for bathroom and kitchen exhaust applications
• Designed for compatible pitched, tile and shingle roofs
• Professional installation recommended

Additional Product Resources

Browse more venting and installation supplies from Xpress Supply. Complete specifications and installation information are available on the official FAMCO product page.

Choose the BVDS4BK when your bathroom or kitchen exhaust installation requires a durable 4-inch black roof vent with a damper, protective screen and removable connection stem. Confirm the roof type, duct size and local installation requirements before ordering.