The DuraVent FSBT4 FasNSeal Boot Tee for 4 FasNSeal vent pipe features a unique locking band and triple-lipped gaskets for easier installation. This boot tee has a length of 11 1/2 and it is used to shift from a horizontal to a vertical flue gas flow. Silicone affects the performance and the durability of steel pipes. Products under the FasNSeal series by DuraVent are silicone-free. This latest designed technology enables these products to last a longer time and reduce the chance of malfunction or ventilation system breakdown. The welded seams guarantee leak-free products. DuraVent (formerly known as Simpson-DuraVent) has been trusted in ventilation production through constant advancement of breakthroughs in commodity improvement and development. Having a wide selection of engineered venting supplies, DuraVent has gained its position as the manufacturing leader through producing innovative, reliable, and high-quality ventilation products. Get reliable venting pipes and commodities by DuraVent here at PlumbersStock.com!