On Dec 4, 3:13*am, Edward Reid
wrote:
Back to my gutter drains. Thin wall 4" PVC pipe, in some places buried
only a few inches deep -- no more than the pipe diameter. How best to
protect it?

I've thought of laying PT 1x4 on top of the pipe -- would not last
indefinitely (not ground contact rated) but perhaps decades. or PT 1x6
for a little extra. Or pour concrete in a thin layer, perhaps 4" wide
and 1/2" thick -- doesn't have to be strong, just stop a shovel long
enough to get the shovel-holder's attention.

Edward

Bury a strip of yellow construction marker tape a couple inches above
it.