Soldering In ball valve

[Dale Mell]

I have a 1/2” copper shutoff ball valve soldered on to the supply. The other end is not connected to anything. Can I solder a pipe to that valve without draining the supply? I will shut off the water and release the pressure against the valve, but I don’t want to drain it unless I have to? Thank you in advance for taking time to reply!

 

[wood4d]

you can solder copper onto that valve without doing anything. The water behind it will make sure you dont unsolder the valve

 

[Dale Mell]

Thank you for the reply