Is it acceptable to use PVC pipe (like schedule 40) under the house to plumb from the main water supply to hose bibs that punch through to the exterior? I have an unfinished cellar space, and I'm in California in a climate that gets a few freezing days in the winter.
The reason for this is that I want to have essentially 3 sets of (cold) water distribution lines under the house:
- Filtered water for drinking, going to the kitchen and bathroom faucets.
- Unfiltered water for all other interior use.
- Irrigation water for exterior uses, that I can shut off and drain for winterization.
For this last set, I'd want a single shutoff and drainage point, but I don't want to run a separate set of fat and expensive copper lines to each hose bib around the house. Everything inside the house and in the cellar does not need to be drained or winterized, only pipes that penetrate to the outside.