I have a contractor who insists he wants to bury PVC directly in a
slab. I know this is wrong... the concrete makes both PVC pipe and
cement at fittings brittle, and they fail with the slightest expansion
or contraction. I have looked everywhere on the web for a reference to
substantiate this, but I can find nothing. Can someone please refer me
to such a reference? This is a HUGE issue on this project. Thanks!