6" long. Allows you to connect DuraVent Type B venting to other B-Vent brands. This product is compatible with the following brands: American Metal Products, Household Manufacturing, Hart & Cooley Manufacturing, Metal Fab Inc., White Metal Products, Air Jet, and Mitchell Metal Products. This unit necessitates a venting pipe with a 4" inner diameter. This adaptor lets you connect Dura-Vent Type B pipes to pipes from other manufacturers including American Metal Products, Household Manufacturing, Hart & Cooley Manufacturing, Metal Fab Inc., White Metal Products, Air Jet, and Mitchell Metal Products. This male adaptor is UL listed to UL 441 and UL 1777 (MH6357). It's ULC listed to ULC S605 (CMH1276 & CMH1407). DuraVent Type B pipes are designed to work with a variety of equipment, including natural gas fireplaces, gas-fired furnaces, boilers, water heaters, and wall and space heating. This adaptor has a height of 6".

6" length Allows DuraVent Type B venting to be connected to other brands of B-Vent Connects to the following brands: Air Jet Metal Fab Inc. White Metal Products Mitchell Metal Products American Metal Products Household Manufacturing Hart and Cooley Manufacturing