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Pex is usable, but CPVC is stronger, and installs more neatly. I would still transition back to copper to exit the house, and to continue to the PVB
I have about 30 feet to run indoors. So I can use tan pipe? What about Pex?
Easy - no indoor PVC in Jersey (and yes, you'll see it all over, but codes have changed) - If you had a really long run of pipe indoors, you would use the beige-colored CPVC pipe and fittings. For less than 20 feet, stay all copper. In any event, a pro doesn't run plastic pipe through the exterior wall.
how could i find out what my codes are here in New Jersey?
Sch 40 PVC indoors is a likely code violation, depending on your location - the rules want it used only for drainage. type L Copper is pricey, but it's strong.
I was going to use sch 40 1" PVC instead of copper from the meter area to the PVB...is that OK or do i have to run copper?
What you should be doing is to simply make your connection, right after the water meter, and bring the copper outside to your PVB, and then do a flow and pressure test. Only at that point can you know exactly what your water supply is.
I measured the pressure on the hose bib and I believe it was 45-50 lbs. never did a flow test
You measured your pressure? You did a flow test? First things first.
1" Wilkins pressure vacuum breaker...
Will I have enough pressure for the system with a 3/4 source?