Pex is cheaper and easier to work with, and easy to bend a little to fit without being cut EXACTLY right. We've used it in all of our installations. You do have to have the right crimper tools, and practice a few times to make sure you're getting good crimps.

Thank you, I am in the middle of a bathroom rip out and redo, and the contractor showed up with pex, I'm so used to seeing copper, does this pex stuff measure up to copper, I really know nothing about it. He also said it was cheaper and easier to work with, but I would hate to have a disaster. If it is inferior product I would just assume to pay a little extra for copper, but if its just as good, I will let him use it. Any other comments are appreciated.

One of the major issues for a PEX plumbing pipe from the over counted is the water vapors condense. A lot of people use the PEX piping system indoors for the kitchen or for the bathing room. In this instance, it truly is practically inevitable for the cold water line to remain near the hot water line. Due to this fact, water will certainly be leaking on to the floor not from a PEX plumbing pipe, but on the vapors that form in between the two pipe joints.

I recently purchased a foreclosed house that needed a ton of work, including new plumbing. My father who has been an electrical contractor for more than 30 years has seen just about anything in a house and is a great resource for everything. But with this experience comes the uneasiness of new technology. Since PEX became popular only 10 or so years ago, my father was weary of using it in my house. The plumber swears by it but still couldn't convince my father 100%, so they compromised. We had them run all copper in the walls and stub copper into the basement. Then they connected the PEX to the copper in the basement and used the PEX throughout the basement. This way we had the ease of running the PEX in the basement, but also now have the piece of mind because of the copper in the walls.

Maybe you could try this solution?

PEX is fine. A few areas still restrict it from certain applications or allow it with certain caveats.

Don't let it see sunlight.

I generally homerun from a main manifold to point-of-use or to a point-of-use mini-manifold, then stub it out of the walls with copper.

While there are myriad connectors out there, I refer Wirsbo and their expansion setup. The physical properties of the PEX itself seal the connection instead of relying on a compression crimp fitting. Especially an advantage in tight spaces where you may not be able to get the crimp tool to the joint location.

Don't overlook proper support, secure it to framing. Hot water lines can expand/contract, you don't want friction noises from pipe movement.

It has the same outer diameter as copper, but a smaller inside diameter due to the increases sidewall thickness. As of now there are no DFU restrictions that I know of.

The only negative "real world" I've read is that some have plumbed a tub spout with pex, when they use the tub spout with diverter to fill the tub the reduced inside diameter of the PEX results in the height of the water column in the PEX building up and water trickling out of the shower head.

"popular only 10 or so years ago" - in the States yes,

However , it has a track record of several decades in Europe.

Thank you all for your input. I had the installer use the PEX. Since I was in a bit of a rush, needing the shower since it is the only one in the house, and with sweating all the copper fittings for the shower spa system would have set us back another day. With all the input I received here and asking around, I am assured I will not have a problem. Thank you........