DuraVent 4 in. D X 60 in. L Galvanized Steel Round Gas Vent Pipe

Use for venting listed natural gas or liquid propane category i draft hood appliances or appliances that have been specifically tested and listed to use type B Gas vent. The appliances listed typically use type B Gas vent systems but not always furnaces, water heaters, boilers, room heaters, decorative gas appliances, and unit heaters. Type B gas vent system pipe features a twist lock connection which offers a superior positive-lock that is fast and easy to assemble. When necessary, the system may be disconnected without damage to the product.