Designed for appliances tested and listed for direct vent. Features a fully unitized twist-lock construction in both 4” x 6 5⁄8” and 5” x 8” vent sizes. Use of sealant is optional, unless specified by the appliance manufacturer. To calculate install length, subtract 1 1⁄2” for each joint. No beads or hems. Black pipe lengths feature exterior laser-welded seams.
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