PelletVent Pro Collection Increaser Adapter Tee with Clean-Out Tee Cap Warranty Notice: M&G DuraVent warranty applies to this professional grade product only when installed by a trained professional installer. This Increaser Adapter Tee with Clean-Out Tee Cap from the PelletVent Pro series is a Type L Biofuel Chimney Pipe component and consists of the duralock system for a tight seal. Use for a 90� offset. Attaches directly to appliance as an adapter. Converts a 3� appliance to a 4� PelletVent Pro system. Removable twist-lock Clean-Out Tee Cap. Features: Fuel Type: BioFuel, Oil, Pellet Inner Diameter: 3" Height: 10" Double Wall Construction UL Listed All PelletVent Pro� components that come into contact with flue gases are built with an inner wall of corrosion resistant superferritic metal. 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 DuraVent�s cutting-edge manufacturing process and commitment to innovation, PelletVent Pro is uncompromised in attention to detail and performance. This perfect fit and finish is made possible with a laser-welded inner and outer wall. Select components are available in black. PelletVent Pro is now UL listed for 1� clearance to combustibles in the USA. 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 1980�s, DuraVent is recognized as the industry leader in venting systems for pellet stoves.