I'm in the process of remodeling my bathroom and currently have all the cement backerboard torn down. I had to remove the sink in order to get a good portion of the tile off. Unfortunately, my old house has no way of shutting off water to the bathroom so I had to completely shut off water to the house.
I added water shutoff valves to the 1/2" pipes for the sink to stop the water. The valve on the hot water pipe has sealed fine with no leaks. The valve on the cold water pipe continues to leak no matter what I do.
Where it's leaking
I've installed it using teflon pipe joint compound. For a few hours it's fine with no drips. However, I woke up this morning and it was steadily dripping all over the place. I'm not sure what to do to keep this from making a mess.
It only needs to be temporary as, in the next couple weeks I'm going to replace most of the plumbing in the bathroom—I just need to be able to have water on in my house without also making an indoor swimming pool!
Best Answer
HomeDepot carries a brand called "SharkBite" that are simple, push-to-connect fittings. You can buy a cap from them for cheap. It requires an equally inexpensive plastic tool to remove. That, or something like it, should get the job done.
The cap: http://www.homedepot.com/p/SharkBite-1-2-in-Brass-Push-Fit-End-Stop-U514LFA/202270531
The removal tool: http://www.homedepot.com/p/SharkBite-1-2-in-Disconnect-Clip-U710A/100638139