If you have a faucet side spray in your kitchen, then you may find that it can sometimes leak when it is not being used, or may even run when the sink is not active. These are often signs that you need to replace some of the washers around the faucet side spray hose, as these can be very prone to wearing out. Replacing them is not very difficult, and you will be able to manage this job quickly and easily, even if you have never done any plumbing before. With a few household tools, and some simple instructions, this project will only take an hour or so of your spare time.
Step 1 - Look at the Washer
If your leak is coming from the spray head, then you need to have a look at the washer inside the sprayer. Begin by turning off your water supply from below the sink. This has a separate valve, which you can turn off using your wrench. With the water supply off, you should then run the taps into the sink until all the water is gone from the pipes. Once this has been done, you can then open up the sprayer nozzle by simply twisting it. Take out the washer. It is usually easily removed, although you may have to prise it out with a screwdriver if it has been in there a while. You can find replacement washers easily. Place the washer back into the spray nozzle, turn on the water, and try again.
Step 2 - Replace the Spray Hose
Sometimes, the washer is not the problem (although it never hurts to replace them), and you will need to try checking other areas of your faucet side spray. Next, look at the hose which the sprayer is attached to. You could try running a pipe cleaner down the hose in order to make sure that it is not clogged or dirty, which can trap water in the hose until gravity prevails. If this is also not the problem, then you should turn off the water again, and remove the spray head. You will need a wrench to take the head off of the hose, as it is usually attached by a very tight nut. Pull out the hose, and then run it through some water. Tape the hose back into place, and refit the spray head. You can then turn your water back on, and test this fix.
Step 3 - Replace the Sprayer
If none of these solutions have worked, then the only other answer may be to replace the kitchen faucet sprayer itself. As usual, turn off the water before you start. Take out the sprayer hose, and remove the head. You may need to use the wrench to unscrew it again. Pull the hose down through the hole until you can grab it underneath the sink. Pull it down, and remove the hose from the water pipe. Insert a new hose, and then refit the head. You should now turn on the water, and check the new hose.