Southwark Metal 39WP6 White Plastic Wall Cap with Damper 6 Inches

Product Description

The Southwark Metal 39WP6 is a white plastic wall cap with an integrated damper designed for 6-inch diameter duct installations. This wall cap is used to terminate exhaust or ventilation ductwork at an exterior wall, providing a clean, finished opening while protecting the interior from outside air, insects, and debris. HVAC technicians, contractors, and builders rely on this type of wall cap to complete dryer vents, bathroom exhaust vents, kitchen range hood exhausts, and general mechanical ventilation systems. The built-in damper is a critical component — it opens when air is actively moving through the duct and closes when the system is off, blocking backdrafts and preventing conditioned air from escaping the building. This keeps energy costs down and maintains indoor air quality. The 39WP6 fits a 6-inch round duct, making it compatible with a wide range of residential and light commercial venting applications. Its white plastic construction gives it a clean, low-profile appearance on painted exterior walls. Plastic caps resist corrosion and do not require painting, which reduces long-term maintenance. The unit is manufactured in the USA, meeting domestic production standards. With dimensions of approximately 8.85 inches wide and 4.4 inches in length, the cap provides a broad coverage plate that seals around the duct penetration point. At a weight of 2 pounds, it is lightweight and easy to handle during installation. Southwark Metal is a trusted name in HVAC sheet metal products, and the 39WP6 reflects their commitment to functional, field-ready components for professional installers. Whether replacing an existing wall cap or finishing a new installation, this unit delivers reliable damper operation and a tidy exterior finish.

• Integrated damper blocks backdrafts and outside air when the ventilation system is not running
• Fits 6-inch round duct diameter for dryer, bathroom, kitchen, and general exhaust venting applications
• White plastic construction resists corrosion and provides a clean finished appearance on exterior walls

Product Highlights

The Southwark Metal 39WP6 is a field-ready, USA-made white plastic wall cap with a built-in damper for 6-inch duct terminations, offering reliable backdraft protection and a clean exterior finish for residential and light commercial HVAC venting systems.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 39WP6

Technical Specifications

• Size: 6 inches
• Pipe Diameter: 6 inches
• Material Composition: Plastic
• Width: 8.85 inches
• Length: 4.4 inches
• Height: 0.29 inches
• Weight: 2 pounds
• Vent Type: Venting
• Unit of Measure: EA
• Country of Origin: USA
• Prop 65: No