Bradlf
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I'm installing a whirlpool tub where a shower use to be on a concrete slab. We had to move the previous drain by jackhammering, have now installed the drain. We have concreted all but the 8" x 14" hole for the drain connection. Now that I've finished the drain plumbing and tested it - should I concrete the remaining hole? I am leaning toward just filling it in with sand.
Brad
Brad