DuraVent PelletVent Pro Black 3" to 4" Increaser-Appliance Adaptor - 3PVP-X4ADB Venting: A venting pipe with a 3" inner diameter is required for this unit. This appliance converter is designed to extend the size of a 3" appliance to a 4" appliance. This lets you to connect your 4" vent pipe to your 3" appliance outlet. This adapter is part of the Pellet Vent Pro venting system, which is designed for use with pellet and oil-fueled stoves and inserts. The vent system's components can tolerate temperatures of up to 570 degrees Fahrenheit. A limited lifetime guarantee is included with the appliance adaptor.

Connects 4" PelletVent Pro pipes to a 3" appliance outlet Sleek black finish 1" clearance to combustibles 4.5" high Limited lifetime warranty