Turn off the cold and hot water in your home before attempting to repair the valve. Depending on the style of valve, you may need a pipe wrench and adjustable wrench to get the job done properly. Be careful not to over-tighten the valve, as it can crack or damage the valve threads. Once the valve is removed, you can connect the supply lines. Make sure to unhook any braided flexible lines from the faucet before attempting to replace the valve.
To replace a kitchen faucet shut off valve, first unplug the supply water line and the valve. Then, unscrew the valve from the pipe and the nut that connects it to the valve. You may have to unscrew the valve in order to access it, but you can easily replace it with a few tools you already have in your home.
If you are removing the faucet, first remove the nuts holding it to the sink. Some nuts are difficult to unscrew, so you may want to use a basin wrench or pliers to remove them. Occasionally, you may need to use a penetrant to loosen nuts that are stuck to the hardware. Then, you will need to clean the area to make sure that it's clean before you replace the faucet.
Once you have removed the old valve, the next step is to remove the old sleeve, which connects the valve to the water supply line. A wire brush can clean off any hardened pipe dope that was on the threads of the old valve. Pipe-joint compound should then be used to coat the threads of the new valve. Once this is complete, reconnect the supply line and turn the faucet on. If the valve leaks, you can lubricate the threads with pipe-joint compound and tighten it.
If you need to install a new faucet, it is best to choose one that matches the existing sink. You can do this by taking measurements of the existing faucet and the hole locations on the new faucet. It's best to choose a faucet that matches the same hole numbers as the old one. You can also purchase a hole cover made from the same material as the existing one.
Adding a new farmhouse kitchen faucet shut off valve is a simple job that most homeowners can handle. While you don't need to replace the supply tube, you may need to replace it if the one that was originally installed is corroded or rusted. If this is the case, it's a good idea to invest in a stainless steel braided supply line. This part of the job is easy to accomplish and costs around $5.