In article .net, KJS wrote:

As far as ball valves go. I replumbed my house 15 years ago and installed
nylon-seat/stainless-ball copper sweat type valves for the main and all
others. Very satisfactory improvement. They operate easily and have no
packings to leak. You need to be proficient at sweat-soldering to install
them without frying the nylon seat.

I've noticed these "No-Sweat" ball valves that I believe have a union
on each end. You just slide a nut onto the end of the pipe and then
solder a hub on, so you can't overheat the valve itself. Would one of
these be suitable for a house main shutoff valve?

Thanks,
Wayne