DuraVent PelletVent Pro 3-Inch to 4-Inch Pipe Increaser

The DuraVent PelletVent Pro 3-Inch to 4-Inch Pipe Increaser provides a transition from 3-inch pipe to a 4-inch pipe. This pipe increaser attaches to appliance outlet to allow pipe to easily connect or disconnect. PelletVent Pro is engineered with features for a durable, safe and aesthetically pleasing venting system. PelletVent Pro is a patent-pending venting system for stoves and inserts that use wood pellets, corn and other biofuels, or oil, as fuel. As a result of a cutting-edge manufacturing process and commitment to innovation, PelletVent Pro is uncompromised in attention to detail and performance. PelletVent Pro is UL listed for 1-inch clearance to combustibles in the USA and in Canada. It's double-wall, air-insulated design offers superior performance. Seams are factory sealed on all elbows, tees, and fittings. Since the introduction of pellet stoves in the 1980s, DuraVent is recognized as the industry leader in venting systems for pellet stoves.