Duravent 4"x6 5/8" Directvent Pro 8-1/2" Pipe Extension

Use to add length to a straight length of DirectVent Pro. 8-½” pipe adds 3”- 7” of length, 16” pipe adds 3”- 14 ½” of length, when used with rigid sections of pipe. Direct vent lengths feature a fully unitized, twist-lock construction. Use of sealant is optional, unless specified by the appliance manufacturer. Does not fit DirectVent GS pipe.