DO NOT use PVC under ground with gluded fittings. I used it for the water line to the garage, the glue used on the joints sperated after just over a year at 80psi. A chemist friend told me this happened because of the acids in the earth.I would think the same will happen with sweated copper joints.Go with galvanized 3/4", so you need to thread a few joints. IT's the safest.
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Tigerpaw65
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