mobile home dwellers been using this for years

Heck it even comes in colors now. Red for hot and blue for cold or white for cheap. I can do an entire home for under 200 dollars and it will last for years.

Next time you need to replace pipes in your home, consider an alternative to rigid piping. PEX-AL-PEX plumbing, or PEX for short, comes in rolls, can be cut easily to any desired length, and requires no soldering and very few joint fittings. This flexible plastic piping is so easy to install that you can handle most projects quickly on your own.

Named for its sandwich-layered construction, PEX uses cross-linked polyethylene as the outside layer, aluminum as the middle layer, and another layer of poly on the inside. This piping is approved in major plumbing codes, and it's had a successful 30-year track record in Europe. It's a little more expensive than rigid copper piping, but the advantages outweigh the extra cost, because you can save money by doing the job yourself.

PEX is sold at all major hardware stores, where it's usually sold as water supply piping and infloor radiant-heat lines. When you buy it, make sure the tubing is stamped with 'NSF-61' or 'NSF pw' (for potable water), which distinguishes it from the PEX that is used only for infloor radiant heating applications.