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Imperial
This Imperial 4-in to 3-in Aluminum Reducer allows you to connect pipe of different diameters where air flows from a larger pipe into a smaller pipe. Crimped on the small end, it reduces the diameter of a 4-in round return or exhaust air pipe to 3-in, while maintaining optimal airflow. The reducer is ideal for general purpose venting applications and is quick and easy to install.
Selkirk Type B Gas Vent - Round
Imperial 4" to 3" Reducer Aluminum Reducer & Increaser
Lambro 4 inch Aluminum Snap-Lock Pipe – 24 inch Length – Item #229
Lambro 3 inch Galvanized Steel Worm Gear Clamp – Item #283
Lambro Industries UL 2158A Clothes Dryer Transition Semi-Rigid Duct
