PVC pipe is not good buried outdoors, it's too brittle. Your best bet is 1" PE irrigation distribution pipe. They have all sorts of couplings and adapter fittings available.
"Thats bullcrap, pvc works just fine underground."
I've always been told to avoid burying consumer-grade sc40 pvc. My 'burb's inspectors typically won't allow it
Problem is, Joe Homeowner digs a trench - by hand - and digs down to exactly the depth at which he wants to place his pipe. Rocks can lurk directly below, and with normal settling you'll have rocks punching holes in the bottom of your pipe is no time.
A contractor - a decent one, I mean - digs down a bit further, cleans out rocks and lays in a more appropriate underfill before dropping the pipe into the trench, thus drastically lessening chances that a rock will stress the pipe.
But it IS too brittle to handle being hung up on the corner of a rock underneath it.