DuraVent PelletVent Pro Black Increaser Tee with Cap - 4-Inch Inner Diameter - 4PVP-T3B: This unit necessitates a venting pipe with a 4" inner diameter. PelletVent Pro chimney liners and chimney pipe supplies are ideal for building a chimney for your pellet burner. A 3" pipe branch can connect to a 4" main vent using this increaser tee. Maximum durability is provided by the .012" stainless steel inner wall and .018" galvalume outer wall. This pipe also has a sleek black finish, laser-welded seams, and secure twist-lock connections. A cap is included in the package, as well as a limited lifetime warranty. The main pipe is 10" high and has an inner diameter of 4" and an outside diameter of 4-5/8".

Efficiently vents pellet and corn-fueled stoves and inserts Creates 90 degree offset for vent piping Allows a 3" pipe branch to be connected to a 4" main vent .012" stainless steel inner wall and .018" galvalume outer wall Sleek black finish Laser-welded seams Secure twist-lock connections 1" clearance to combustibles Includes cap UL Listed Limited lifetime warranty Dimensions: main pipe has a 4" inner diameter with a 4 5/8" outer diameter 10" height