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System 636® Vent Increaser Coupling, Hub Connection, PVC, 6 x 4 in Diameter
System 636 increaser couplings allows vent system to be upsized where additional flow velocity or equivalent vent length is required.
System 636® Vent Increaser Coupling, Hub Connection, PVC, 6 x 4 in Diameter
System 636 increaser couplings allows vent system to be upsized where additional flow velocity or equivalent vent length is required.
