A 1 1/2-inch diameter PVC schedule 40 drain pipe is installed in a trench under a building's concrete porch. The pipe is buried. What is the minimum required cover over the pipe to protect it from physical damage?
A 1 1/2-inch diameter PVC schedule 40 drain pipe is installed in a trench under a building's concrete porch. The pipe is buried. What is the minimum required cover over the pipe to protect it from physical damage?