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The DirectVent Pro 4" x 6-5/8" Inner Diameter Galvanized 8-1/2" Pipe Extension is a component that is used in a typical venting installation. The DuraVent pipe extension is used 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, whenused 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. Available in black or galvalume exterior (both feature laser-welded outer wall seams). Does not fit DirectVent GS pipe.
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