how to change a bathroom water valve
How do I change a under the sink water shut off valve? Once you have the correct size of the pipe turn off the main water supply. Remove the old valve (may need to take a hacksaw or tubing cutter, if its soldered on). Then slip the new nut and compression ring over the pipe. Next bring the valve up to the pipe and tighten the nut to the valve.he water shut off valve that is under my sink in the bathroom is leaking and I need to replace it. I am wondering if I need soder the new one or can I just put some thread tape around it. Follow. 4 answers 4. Report Abuse.