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This Imperial 4” to 3” 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” round return or exhaust air pipe to 3”, while maintaining optimal airflow
• The reducer is ideal for general purpose venting applications and is quick and easy to install
• The Increaser allows you to connect pipe of different diameters where air flows from a smaller pipe into a larger pipe
• High quality aluminum construction for lasting use
• Quick and easy to install