In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
For underground piping how much cover/concrete is appropriate to place on top of an ABS dwv system? I couldn't find any specific answers. Is there an exact answer? I've seen pipes in the past gradually rise up until then are actually above the concrete (this was cast iron in some very old houses).
I'll reiterate since I'm often long winded - what's the code on covering underground horizontal dwv?