Originally Posted by dwoloz
I'm looking to replace my galvy 1/2" water main line with either 1" soft copper or pex. I'm leaning towards the pex because of the cost saving. Pex was just approved last year in California and being new here, I haven't seen any examples to learn from so Im flying in the dark a little
Our water meter is in the sidewalk and the main line currently runs underground 15ft, goes to the surface right before the foundation where there is a shut off valve, then goes through the wall into the crawlspace. (It should be noted it doesn't freeze in this climate)
Since pex is UV sensitive, Id obviously not want to daylight it like the current setup. Id rather want to run it underneath the foundation into the crawlspace, yes? If so, where would I plumb in a shut off valve? There unfortunately does not appear to be enough room in the meter box to put one in.
Also, would you recommend running the pex sleeved in something like ABS for the underground run?
I would run copper under ground from the meter to the shut off valve and after the valve into the crawl space. Copper would provide the strength to support the valve and, being exposed to sunlight, would not have any UV on PEX issues. Just be sure to use copper approved for burial.
If you don't have a pressure regulator, I would install one right after the valve outside of the house, then go into the crawl space. Once inside of the crawl space, I would switch to PEX for the house plumbing.
One other thing to consider. I have an outside water faucet between the shut off ball valve and the pressure regulator. Since our city water pressure is about 120 psi, I can use that pressure to clean the sidewalk along side our house, clean the trash pickup bin, and various other pressure cleaning chores. Our pressure regulator brings the pressure down to 60 psi for the house.