3 inch Pellet Vent Pro Clean Out Cap, Stainless This Dura Vent PelletVent Pro Stainless Steel Clean Out Tee Cap is designed for use with three inch stainless steel PelletVent Pro tees. Applications Pellet Vent Pro is a venting system designed for stoves and inserts that use wood pellet and oil fuel. Rated for continuous use flue temperatures up to 570 degrees Fahrenheit. Materials and Construction Laser welded, double wall pipe with an inner wall of .012 inch stainless steel and a .018 inch laser welded galvalume outer wall. Painted black exterior available. Clearances 1 inch clearance to combustibles in the USA for appliances using wood pellets or oil. 1 inch clearance to combustibles in Canada for oil burning type L vent appliances. 3 inch 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.