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Sure, assuming that the house is being custom-built for you. What about spec houses? PEX may be the best thing since sliced bread...I don't know, frankly, having been out of the business for some years. But...it also may not be. I remember when the same arguments were used for CVPC for hot water piping. Turned out that that stuff was crap, and even possibly toxic. Try replumbing a house if you want some real expensive hassles. If I were buying a spec house, I would not buy it if it had any plastic pipe in the walls. I'd ask, then walk if it was there. Copper will last a lifetime. Should the government be telling us what goes into our houses? Well, it's been doing that for many decades. Building codes are just that. No doubt there are things in there that shouldn't be, but the idea is good. Frankly, you have no idea what's inside the walls of a spec house. You can't see inside the walls. Without properly-enforced building codes, you would not believe what would pass for construction standards. The government has a role in this.

What concerns me is the requirement to faithfully abide by ANSI Z223.1 and NFPA 54 codes and graciously submit to the enforcing authorities. It's irresponsible of the sanctioning bodies to surreptitiously conceal this information, making it available only to the "chosen few" . . .

what are you talking about? and please know your facts before you speak about piping materials. PLEASE! And don't argue with me. I am willing to discuss this issue but if you try to argue I will decimate your arguements easily. just a fair warning.