How to Replace a Kitchen Sink Shutoff Valve
Water shut off valves become old and can either start leaking, or the setscrew holding your handle to the shut off valve wears out. When these events occur, you are left with no choice but to replace your shutoff valve. You will have two shutoff valves located underneath your kitchen sink. One is to shut off your hot water, and the other one is to shut off your cold water. These valves are almost always located on the back wall and will most likely have round or oval shape handles. You will spend more time turning your water on and off than it actually takes to replace your shutoff valve.
Tips & Warnings
An older shutoff valve may have to be cut off. Use a hacksaw and cut as close to the shutoff valve as you can get. You must have enough pipe left to install your new shutoff valve.
You will need a shutoff valve the same size as the old one, and it must also have a compression nut and compression ring.
Slide the compression nut onto your water pipe with the large hole facing out. Follow the compression nut with the compression ring. The compression ring will form a tight seal around the water pipe.
Install the new shutoff valve by sliding the threaded end onto the pipe, and then sliding the compression nut and ring to the valve. Tighten the compression nut onto the back of the shut off valve.