Increases the diameter of PelletVent Pro Vent Pipe from 3" to 4". 4.75" tall. Limited lifetime warranty included. A venting pipe with a 3" inner diameter is required for this unit. Do you want to make your PelletVent Pro Vent Pipe bigger? This PelletVent Pro 3" to 4" Vent Pipe Increaser expands a pipes diameter from 3" to 4". PelletVent Pro is a venting solution for wood pellet and oil-fueled stoves and inserts. (Rated for continuous usage at flue temperatures of up to 570°F.) Made of laser-welded double-wall pipe with an inner wall of .012" stainless steel and a .018" laser-welded galvalume outer wall. The exterior can be painted black if desired. Required 1" clearance to combustibles in the USA for appliances using wood pellets or oil. Required 1" clearance to combustibles in Canada for oil-burning (type L vent) appliances. Required 3" clearance to combustibles in Canada for wood pellet-burning appliances. Listings - c-UL-us Listed to UL 641 (MH8381 and MH14420). ULC Listed to ULC S609 ULC/ORD C441 (CMH1439 and CMH1440). DuraVent Dura vent Item Number: 3PVP-X4

Increases the diameter of PelletVent Pro Vent Pipe from 3" to 4" 4.75" tall Limited lifetime warranty