I‘m attempting to solder copper pipe fitting to the tub shower faucet. (nw installation) I‘ve noticed the new faucet assembly is getting hotter then hell. Is this okay as there are plastic valves and parts in there? If not how else are you supposed to do this portion of the job? The assembly has threaded leads so it has to be soldered to the connections? Help
My first thought would be to take it apart first and solder only the metal part, and put the plastic back after it cools off. My second thought is to wonder about the contradition in your question - does it have threads or not? In all the houses I've had, the chrome arm for the showerhead threads into a fitting that is soldered to the top of a copper pipe. The threaded fitting is just a hunk of brass. A little tape and a few turns and the shower head arm is in place.
I will take out the guts of a faucet if direct solder is needed. It is usually a fairly easy task. Does the installation instructions on faucet have a drawing or instruct how to change washers, etc?
You should take all the Assembly apart first,and any part with threads should not be soldered but use Teflon tape. solder all the appropriate joints making sure there in the correct position and then reassemble all the plastic parts using the Teflon tape on the threads.