Imperial 4 In. Dia. To 3 In. Dia. Aluminum Vent Decreaser
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Description
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.
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