The Metal-Fab 4MIN5, 4" x 5" Increaser is a venting accessory designed for use in B-Vent systems. This product allows for a smooth transition between different pipe sizes, facilitating efficient airflow in heating and ventilation applications. It is crafted to be durable and is used in various HVAC installations to connect a 4-inch B-Vent pipe to a 5-inch B-Vent pipe. This increaser is ideal for applications requiring a change in vent size without compromising on system performance or safety​.
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