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:
http://www.lowes.com/pd_596141-138-38568___?productId=50163629&pl=1&Ntt=washer+box
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.
Best Answer
If you look closely at the valve inlets, they are designed with a 1/2" male iron pipe thread (MPT) for a threaded connection, OR you can solder 1/2" copper pipe directly to the inside of the threaded fitting. It's made to accomodate either method.
You do not need any additional fittings.
You need to be careful though, there are o-rings and teflon seals inside the valve that can be damaged by the heat from soldering. You need to take it apart by removing the large screws next to the handle, solder the included fittings, then reassemble.
See this schematic.