running water pipe to stable
I wouldn't be too concerned about what type of piping is in the stable, but more worried about your connection to the house.
In oregon at least, PVC is not allowed inside of the building. The stable being an outbuilding, probably wouldn't be an issue. Make your stub out of the house with whatever material is already inside, and connect with pvc 2 feet from the house.
As for sizing, you need to size according to what you're going to be using out there as far as fixtures go.
Depth is probably 12" below frost level, but check local code....
Last edited by Alan; 06-12-2010 at 11:06 PM.