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.
