Backfilling trench in slab
Posted by Mark DIY on December 02, 2003 at 16:08:41:
I finished moving my PVC drain pipes within a 4' x 1' trench cut out of the concrete slab in my basement. Got the city inspector to come out and give me the green light that all is up to code and ready to backfill.

I've not worked with a concrete pad before and would like some insight if anyone is willing to share. Do I throw back in the dirt I took out, put a layer of plastic across it, add an inch or so of gravel an pour and level 4" of concrete. Is it necessary to use sand to cover the pipes? Any other items I should look out for as I fill it in?

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