Plastic pipe for underground?

[farmer2009]

And just to note, he is referring to the schedule of the pipe (20,40,80)... you will see 'foam core' pvc that has a thick wall but it is NOT pressure rated so you do not want that stuff. Also, at the range someone ran schedule 20 for all the outside hydrants. Now when you go to work on the stuff or tap in it is like working with glass. Frustrating to be trying to cut the stuff with a saw and it just keeps cracking further and further back on the line. Schedule 20 is cheaper but I wouldn't use it after my experiences with it.

Agreed. 200 pound or schedule 20 is thin. But a trick to cutting it is using the PVC cutters. Apply pressure till it deforms then spin them and a click and spin once cut half way though you can just cut away as normal. We have a bunch of 200 pound stuff above ground (8000 feet). Always a test to cut it now that it's 15 years old.