Imperial

imperial 4 in. dia. to 3 in. dia. aluminum vent decreaser - 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.