The tight inner connections offer excellent performance without the need for gaskets or sealants at the pipe connections (unless specified by the appliance manufacturer). Constructed of .020" aluminum inner wall and .018" galvanized outer wall or black finished outer wall. The black outer wall pipe is laser welded for a sleek finish. The black outer wall option is a good choice for pipes that are visible inside the room. While the galvanized pipe is best used inside a wall or chimney chase.

The outer wall of the Direct Vent Pro pipe brings in the combustion air and the inner wall is dedicated for the exhaust from the appliance. The DuraVent Direct Vent Pro chimney pipe is available in two sizes: 4" inner x 6.625" outer pipe and 5" inner x 8" outer pipe. The size of the pipe is going to be dependent on the gas or propane stove.