I was looking at some construction options for cost versus potential
benefit. Putting a little extra money in under slab plumbing made
sense if it would provide extra resistance to subsidence, thermal
contraction, or seismic vibration.
To get an idea of the cost difference, I tried to compare schedule 40
and schedule 80 sanitary tees. I did not find any of the schedule 80
tees on the internet or at HD. Is this because they don't exist? Any
comments on finding the tees or tips on protecting under-slab plumbing
are appreciated. My buddy insists that I need to pay for a basement
for easy access to plumbing, but that's not an option right now.