How to Install a Kitchen Sink Sprayer

kitchen faucet with sprayer
Alan Levine / Flickr / CC by 2.0

Many newer faucets have spouts with extendable hoses that serve as sprayers, but before this advance, many kitchen sinks had separate sprayers that were mounted on the body of the faucet plate or off to the side in a separate hole. Free-standing kitchen sink sprayers are still available, so there's no need to buy an entirely new kitchen faucet when the sink sprayer needs to be replaced. Installing a kitchen sink sprayer is a fairly easy project that you can do yourself if you do not mind laying under the kitchen sink for a bit.

Tools and Materials You Will Need

  • Sink sprayer
  • Channel-type pliers (two pairs)
  • Basis wrench
  • Plumber's putty 

How to Replace a Kitchen Sink Sprayer

  1. Check to make sure that your sink and faucet can accommodate a sprayer. Check the configuration of the sink to make sure that there is an available mounting hole for the sprayer. Also, check the faucet to make sure that there is a diverter valve for the sprayer. This valve serves to shut off water to the spout and direct it to the sprayer hose when it senses the pressure release that occurs when you press the sprayer handle. If the faucet doesn’t have a diverter, a sprayer cannot be installed.
  2. Shut off the water to the faucet.

  3.  Remove the sprayer flex line from the faucet body. There should be a copper tube coming down from the faucet body that will have a brass connector on it where the sprayer hose is attached. Grip the brass connection with one pair of pliers and then unscrew the hose connector nut with the other pair of pliers. If you do not grip the brass fitting, you may twist the copper tubing leading to the faucet and break it. 

  1. With the hose disconnected from the faucet, pull the sprayer up and out from above the sink. Take this piece with you to the home improvement or hardware store to purchase the replacement sprayer.

  2. Install or replace the housing for the kitchen sink sprayer. Remove the sprayer housing (if necessary) by unscrewing the mounting nut from under the sink with a pliers or basin wrench. The body of the sprayer may turn with the nut, so in this case, you will have to hold it steady as you tighten the nut.
  1. Install the new sprayer housing by putting it through the top of the sink into an available hole. The housing should have a gasket of some type around the base of it. If it does not, you can put a  small bead of plumber’s putty under the base to help seal it and keep water from getting under it.
  2. Tighten the mounting nut for the sprayer housing from under the sink, using either a basin wrench or channel-type pliers. Apply pressure against the housing if tightening the nut causes the whole housing to twist.
  3. Connect the kitchen sink sprayer hose to the faucet. Push the new sprayer hose down through the housing so it is all the way in and ready for the connection. Before you connect the hose to the faucet, make sure it is in a position that will allow you to extend it easily without tangling. Make sure to grip the body of the faucet when tightening the sprayer hose nut to ensure it does not twist and damage the faucet.
  4. With everything tight, turn the water back on and check the sprayer for leaks. Run hot water through the sprayer to soften the tubing and allow it to go up and down easier.