I've done a search and nothing particularly relevant came up so...
I'm in the process of moving the washer and dryer in our new house and trying to figure out how to mate the valves in the connection box to the copper lines. I have a box similar to this where the values are attached via a single shut off:
The ends are threaded, so I guess I just need to add a 1/2" to female threaded fitting like this?
I don't currently have the part sitting in front of me, but I don't recall the male threads being turnable to screw into the fitting (I'll have to double check). Is there a trick to it, or do you screw it in and then sweat it? But that seems like a terrible idea given that its right near the plastic enclosure.