Can you use a push-fit valve?
Several companies make quarter-turn push-fit ball-style shutoff valves that install without tools. They’re a good alternative to sweat and compression fittings if you have enough tubing projecting out from the wall and if that tubing is in good shape. They make the job even simpler. If your stub-out tubing is perfectly symmetrical, long enough and has a square-cut end, you might be able to use a push-fit valve to replace your old compression or sweat valve.
Most push-fit valves require at least 1 in. of stub-out tubing. So measure the length of the stub-out and refer to the valve manufacturer’s length requirements before buying. If your tubing will work, shop for a valve that meets your configuration needs (straight or angled). Push-fit valves are available with and without a permanently mounted supply tube. We don’t recommend the permanently installed supply tube version because you have to shut off the water and replace the entire unit if the supply tube ever needs replacement.
Before installing a push-fit valve, remove any burrs from the open end. If you’re replacing a sweat valve, remove all traces of solder and ensure the tubing is perfectly round. Then mark the installed length on the tubing and push the valve onto the tubing until it reaches the mark.