I feel like a bit of an idiot for asking this question because it seems like there must be a simple answer to this, but I can’t quite figure out what it is.
Let’s say I have a check valve that is threaded on both ends.
And let’s say I’m using some copper press fittings to attach it to copper pipe.
So I screw those fittings onto the ends of the check valve, then press the fittings onto the pipes to finish the connections.
Check valves don’t last forever, though, and at some point it might break and need to be replaced. The fittings don’t rotate so you can’t unthread them from the check valve, and the check valve can’t rotate because loosening one end tightens the other end.
I could cut the pipes where they enter the fittings and toss it all out, but now I’ve lost pipe so a new check valve and fittings won’t be long enough to press back onto the pipe ends. So I guess now I need to cut the pipes back further and introduce more fittings and pipe to get the pipe back to the original length?
Is that the only way to replace a threaded part in this scenario? Or is there some other part/fitting or way of doing this that’s better?