I would strongly reccomend buying 2" 200PSI rated poly pipe instead of PVC. It is flexible (relatively speaking) and resists cracking from expansion/contraction and is pretty thick so physical abrasion from freeze/thaw is an unlikely issue.
I would have a hard time sleeping at night with PVC. If you DO go PVC, please go with Schedule 80. 1500' of line= lots of "opportunities" to have to dig up and repair your line. Make it as ramrod straight as possible. Paint mark your trench before you dig. QUOTE]
I disagree. I've never had to dig up a leaking PVC pipe because of a split caused by a scratch or nick in the pipe, but I have with poly. I sleep well at night even though I have a couple of miles of buried SCHEDULE 40 PVC pipe on my place, from 3/4" to 2", operating at 80 psi on city water.
On the other hand, I worry all the time about my few hundred feet of poly pipe.
I plow in all my new pipe, and I will never use poly again.
gabby