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View Full Version : To concrete or to not concrete!



bradlf
11-05-2005, 02:18 PM
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

jeffreyhel
11-05-2005, 07:44 PM
fill it with sand until you get within one inch of the top and cement the reset. This way you will keep out bugs and maybe some ground water.

Gary Swart
11-05-2005, 10:10 PM
I think I'd use patching concrete probably more like 3" or 4" on top of the sand. Reason for the patching concrete is that since it contains no rock, it would be much easier to chip out if needed.

hj
11-06-2005, 06:14 AM
Our "inspectors" are worried about gophers digging under the house and getting under the tub, so we have to concrete the hole. It just takes a thin coating of mortar, concrete, or whatever.

bradlf
11-07-2005, 03:49 PM
Thanks guys - it's nice to know the right thing to do and the reason!
Brad