I have some old polybutle pipe that I am thinking of replacing with PVC. I have already had to repair two leaks in an area where there are tree roots and I think in the long run I will save money by just replacing that part of it. It is buried about 3 feet deep which makes it time consuming to dig down to and fix. I would like to bury the replacement pipe at a much shallower depth. What is the minimum depth?
Also, any other comments or advice would be appreciated.