4″ Self-cleaning Blast Gate sized to receive 4″ sewer & drain PVC. Blast Gates are designed to work with 4″ PVC. They have an inside diameter of close to 4.22″, allowing a 4″ PVC to easily slide inside the opening.Features:Injection MoldedPositive stop for slidePositive stop for pipeAutomatic slide tension keeps it in placeSelf-cleaningApproximately 4.22″ inside diameterSpecifications:Note – this product is not made for metal spiral ducting.
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