I used them to runa 60' section of water line for another garden hose location on the other side of my house.

I tapped into an existing copper line near an existing spigot under the house with a sharkbite T-fitting, and ran 60' of cpvc line from there.

I have had it for two years and I check it periodically for leaks, and I have never seen a drop of a leak.

I have had professional plumbers warn against using these in other forums because of the o-ring seals inside, but this was due to pure speculation on their part.

Oh, I almost forgot, I also used them on my washer hook up to install new shut off valves in my laundry room.

I don't know if I would use them for interior wall plumbing just in case, but they sure are so, so easy to install and are very forgiving compared to sweating copper pipes.

You can do ten times the plumbing with these compared to sweating pipes, and what I really love is the fact that you can connect copper to cpvc using one fitting that takes seconds to install.

make sure you get the little quick disconnect tool in case you goof up with the measurements.