This all began when we noticed that one of our valves under the bathroom sink was leaking.
In addition to the leaking bathroom valve, the ones in the laundry room were really old and one had a handle.
Our house has copper for plumbing so I was able to reuse the existing compression fitting and nut from the old valves. I’ll include some links at the end for water line valve installation on different materials.
First thing is to turn off the water to the house. The water shut off valve for our house is in the sidewalk in front of the house. Use a wrench to turn the valve.
Drain the water from the lines by opening up a faucet until only a slight trickle comes out. Draining the lines usually takes between 5 to 10 minutes.
No matter how much you let the water drain there will always be some coming out of the pipes when you start removing the valves. Make sure you put some towels in the area to catch any water that might leak out.
You’ll notice in the picture below that the hose is permanently attached to the water shut off valve for the bathroom faucet. Because of this I had to replace the water shut off valve and the hose going from the valve to the faucet.
One of the laundry room water shut off valves was really stuck, but a couple shots of WD40 and about 5 minutes later it came off with no problem.
When removing the valve, use the biggest wrenches / pliers possible that still allow for full range of motion in the work space. As you can see below they don’t have to be pretty.
I love the 12 inch crescent wrench I have, similar to this Crescent 12-Inch Adjustable Wrench. It provides great torque and is one my go to tools.
I left the nut and brass compression ring, also referred to as a ferrule, on the copper pipe. The idea behind this is to reuse the old nut and compression ring on a new valve.
There are different threads available for the replacement valve. The best thing is to remove the old valve, take it to the local hardware store and match up the threads. My water valves have coarse threading.
Just a side note. My replacement laundry room water valves cost about 50% more than the bathroom ones.
Wrap some Teflon tape around the threads of the new water valve.
- Just pretend you are tightening the nut back on to the threads. That is the direction to wrap the tape. If wrapped in the other direction it will loosen and start to come off.
- On most of the replacement water valves I wrapped the threads 3 times around. If there is a golden rule of how many times to wrap the threads with Teflon I don’t know it. Sorry
Hand tighten the nut on the replacement water valve then finish tightening with a wrench.