Selkirk's Increaser is used when an installation calls for the need to increase the size of the pipe to make a connection between a 6" and an 8" piece of pipe.Fabricated from 22-gauge cold roll steel. Up to 60% thicker than most hardware store brandsLaser and Advanced Resistance-welded seams makes snap together pipe obsolete. Guarantees a completely sealed seam: no smoke or flue leakage
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