I had a plumber run some new pex supplies for a sink in my basement. The pex stubs into 1/2" copper for the rough-ins as normal.
The supply faucet I want to put on the copper is NPT threaded vs. a compression fitting, so my plan was to cut the stubs to length and solder a threaded copper fitting on the end.
Is it OK to heat up those short sections of copper with PEX attached an inch or two behind it? I'm nervous that I might compromise the connection.