I need to put an adapter onto a ball valve at the end of a supply line. Do I need to shut the water off to the whole line?

  • Does it required soldering? – Ack Mar 22 '20 at 17:40
  • Yea....attaching the adapter to go to the new bathroom. Going from copper to pex – Scott Mar 22 '20 at 18:22
  • 2
    The pipe were you are soldering can't have water in it as it will absorb the heat and prevent a good (or any) connection. As long as your section of pipe is water free then you are good to go. – Ack Mar 22 '20 at 18:26

The ball valve can, I assume, shut off the flow where you need to attach the adapter. In that case just close the valve, attach your adapter, and proceed.


There are other options, one is to get a “pipefreezer”, a kit that freezes a section of pipe allowing you to work on the free end.

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