DuraVent 4PVP-36B 4" Inner Diameter - PelletVent Pro Type L Chimney Pipe - Double Wall - 36" Pipe LengthCategory: Pellet Stove Chimney PipePelletVent Pro Collection 4 Inch x 36 Inch Pellet Chimney Straight Black Length PipeWarranty Notice: M&G DuraVent warranty applies to this professional grade product only when installed by a trained professional installer. This 4 Inch x 36 Inch Pellet Chimney Straight Black Length Pipe from the PelletVent Pro series is a Type L Biofuel Chimney Pipe component and consists of the duralock system for a tight seal. Features fully unitized, twist-lock construction in 3” and 4” diameters. Listed at 1” clearance to combustibles in the USA and Canada. It can be used in both vertical and horizontal installations. Stainless steel welded seam inner wall, combined with a galvalume welded seam outer wall. Pipe OD is diameter plus 5/8”. Galvalume or painted black outer finish. 12” length available with stainless steel outer (SS). To calculate installed length, subtract 1 1/2” from each length of pipe.Features:Fuel Type: BioFuel, Oil, PelletInner Diameter: 4"Length: 36"Double Wall ConstructionUL ListedAll 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.Looking for Simpson Dura-Vent? You found it! Simpson Dura-Vent has changed their name to DuraVent. DuraVent is a recognized technological leader in the venting industry. Consistently the first to market with new innovations in venting systems, DuraVent has captured a leadership position in emerging markets. DuraVent has patents for several products and continues to design safe and technologically advanced venting. The company's research into solving problems with corrosion, when biofuels such as corn are used, led to the break-through patent for PelletVent Pro. Scientifically proven materials and unequalled engineering make DuraVent products not only the best choice, or safest choice, but the only choice for professional quality venting products.