Builders Best 111716A 4 Inch Duraflo J-block Vent Hood Flush Tail White

Product Description

The Builders Best 111716A is a 4 inch Duraflo J-Block vent hood designed for wall installations on brick, siding, and stucco exteriors. This plastic vent hood features a flush tail design and comes in white to blend cleanly with most exterior finishes. It is built for clothes dryer exhaust venting and bathroom exhaust fan venting, making it a versatile option for residential construction and renovation projects. HVAC technicians, contractors, and builders rely on this type of wall vent hood to properly terminate duct runs at the exterior wall, protecting the interior system from backdrafts, pests, and moisture infiltration. The J-Block design is a low-profile hood that sits close to the wall surface, reducing the visual footprint on the exterior. The unit includes a chatterless flapper, which is a weighted closure mechanism that significantly reduces wind noise compared to standard spring-loaded flappers. The weighted design also discourages birds and small animals from nesting inside the duct opening, a common problem with traditional vent covers. The hood includes a reversible trim ring that accommodates varying wall thicknesses and installation depths, giving installers flexibility across different construction types. An 11 inch tailpipe is included, simplifying the connection to existing ductwork. The face measures approximately 7.5 inches wide by 8.5 inches tall, while the overall unit dimensions are 8.25 inches wide, 9.5 inches tall, and 18.75 inches in length. The body is constructed from polypropylene plastic, which resists corrosion and weathering over time. The pipe diameter is 4 inches, compatible with standard dryer duct and bathroom fan duct sizing. This product is sold individually and ships from Canada.

• Chatterless weighted flapper reduces wind noise and blocks pest entry
• Reversible trim ring fits varying wall installation depths for flexible use
• Includes 11 inch tailpipe for direct connection to 4 inch ductwork

Product Highlights

The Builders Best 111716A J-Block vent hood delivers a low-profile, weather-resistant wall termination point for dryer exhaust and bathroom fan venting. Its chatterless flapper and polypropylene construction make it a reliable choice for exterior wall duct terminations on brick, siding, and stucco.

Product Information

Standard Information

• Brand: BUILDERS BEST
• Manufacturer Part Number: 111716A

Technical Specifications

• Size: 4 inches
• Pipe Diameter: 4 inches
• Width: 8.25 inches
• Height: 9.5 inches
• Length: 18.75 inches
• Weight: 5.03 pounds
• Material: Polypropylene Plastic
• Vent Type: Wall
• Product Family: J-Block
• Color: White
• Country of Origin: Canada
• Unit of Measure: Each