Shower valve inst-Male Threaded fittings or Unions?
Are using unions a good idea for a shower valve installation?
I normally solder threaded male copper fittings onto short pieces of pipe and then thread them into the shower valve with some pipe thread dope. Then when I do some additional sweating, it seems far enough away so as not to bother the valve or burn the pipe dope.
Occasionally, I notice a pinhole leak at the threads and end up having to redo the run, because I can't tighten the fitting to stop the leak
I just demo'd a shower stall and found that the builder used unions to connect up the shower valve. This seems like a better way to do it. What do you think?