If you have an existing chimney pipe or flue liner and are looking to make a switch to a pellet stove, the Rock-Vent Pellet Vent Chimney Adapter is for you. The chimney adapter is used to connect Rock-Vent Pellet Vent pipe to a single wall pipe, or connect to a Class A chimney pipe adapter to utilize an existing pipe for the chimney flue. The chimney adapter is available for 3" and 4" Rock-Vent Pellet Vent pipe and choose between 6", 7" and 8" size for the chimney connection. The chimney connection end is a female end to accept the male chimney adapter or a male single wall pipe. The quick connect male end of the pellet vent side easily connects to the pellet vent pipe. The painted black finish will match well with the black pellet vent pipe.