How to Repair a Leaking Ball Faucet

Kitchen faucet sink with some apples drying
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  • 01 of 03

    Repairing a Ball Faucet

    Ball faucets are found in the kitchen and bath. They look similar to disk faucets but operate with a special ball that controls the flow and mixture of water. Peerless / 2013

    Repairing a leaky faucet is a very common home plumbing repair. However, because there is a wide ​variety of faucet types found in the home, even this easy repair can seem a bit daunting. For example, a single-handle faucet may be either a ball-type faucet or a disc faucet, and the repairs are quite different for each type, even though they look very similar. And each type of faucet may have variations from manufacturer to manufacturer. 

    Ball-Type Faucets

    This project discusses repairing the special type of washerless faucet known as a ball faucet. A ball faucet has a single handle that controls a special plastic or metal ball inside the faucet body. This ball has chambers or slots in it, along with rubber O-rings and spring-loaded rubber seals. As the lever is moved, the ball's position inside the faucet body controls the flow and mixture of hot and cold water coming out of the faucet. When the handle is operated, there is a distinct feeling of the ball rotating smoothly inside the body of the faucet. It is quite different from the operating "feel" of a single-handle cartridge faucet, in which you can usually feel a cartridge lifting and rotating when the handle is operated. 

    The ball faucet was brought to market in 1954 by Delta faucet and made popular as a single lever kitchen faucet by Delta Faucet® and its DIY brand, Peerless®, starting in the 1970s. This type is also popular as a bathroom faucet.

    These faucets have no traditional washers that leak, but they do have spring-loaded rubber seals. These faucets may begin to leak when the seals dry out, when the springs weaken, or when the rotating ball becomes cracked or acquires a mineral buildup. Finally, the spout itself has rubber O-rings that can dry out and cause leaking around the base of the faucet  

    Tools and Supplies You Will Need

    • Allen wrench
    • Pipe wrench or channel-lock pliers
    • Screwdrivers
    • Utility knife
    • Ball faucet repair kit (specific to faucet model being repaired)
    • Replacement control ball (if needed)
    • Heatproof plumber's grease


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  • 02 of 03

    Repair Kits for Ball-Type Faucets

    Repair kit contents may vary but usually include O-ring, cam, cam washer, rubber valve seats and springs and a spanner wrench for tightening the locking ring. Ace Hardware

    A ball faucet may leak due to a number of worn parts. If the faucet leaks from the base around the bottom of the spout, this is usually caused by a worn O-ring at the bottom of the faucet body. If the faucet is leaking from the tip of the spout or aerator, then water is not being properly controlled by the lever ball or the spring loaded rubber seals. In this case, the rubber seals may be worn, the springs may be worn, or the control ball itself may be damaged.

    To determine the cause of the leak, you'll need to disassemble the faucet (a very simple job) and visually inspect the parts. For simplicity, you may choose to simply replace all parts rather than diagnosing the specific reason the faucet is leaking.

    Faucet repair kits are widely available for many different ball faucets and they include everything you will need for the repair. The kits are specific to certain model, so make sure you buy one for your exact make and model. Some kits include the control ball assembly, while others include only the springs, seals, and O-rings. The ball may come in a plastic or brass version; the brass ball versions are a bit more expensive but they last longer.

    Most repair kits include O-ring, cam, cam washer, rubber seals, and springs, as well as a helpful little tool that has an Allen wrench on one end and a spanner tool on the other side for tightening the faucet locking ring.

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  • 03 of 03


    Removing the cam and cam washer. Danco 2013
    1. Purchase the proper repair kit for your faucet model and make.
    2. Turn off the water supply to the faucet. Usually, the hot- and cold-water shut-off valves will be located under the sink. In the rare case when you cannot find the fixture shut-off valves, you will have to temporarily shut off the main shut-off valve controlling water to the whole house.
    3. Using the Allen wrench that comes in the repair kit (or another of proper size), loosen the handle by turning the set screw counter-clockwise. Remove the single lever handle. This will expose the faucet top cap.
    4. If the faucet is leaking from the base of the faucet spout, use the special spanner wrench to tighten the locking collar by turning it clockwise. If the leak stops, you can simply put the handle back on the faucet. If the leak continues or if the faucet is leaking from the spout, then continue with the next steps.
    5. Using a pipe wrench or channel-lock pliers, grip the knurled top cap and turn it counter-clockwise to remove it.  (Wrapping masking tape around the upper and lower jaw of the plier can prevent damage to the cap's finish.)
    6. Once the top cap is removed, the cam will be exposed. This is the plastic piece with the lever poking through it. Remove the cam, cam washer, and the ball assembly.
    7. Once removed, inspect the control ball for wear. If it is scored or damaged, replace the ball as part of the repair. Either a plastic or brass ball can be used. 
    8. Using a small flat-blade screwdriver, reach down and remove the rubber valve seats and springs from the ports in the bottom of the faucet body.
    9. Next, remove the faucet spout by lifting it up and twisting it off. It may require a slight tug to remove. 
    10. Remove the O-ring around the base of the faucet body by prying behind it with a screwdriver, or by carefully cutting it with a utility knife. Be careful not to scratch the body of the faucet. 
    11. Take the new O-ring from the repair kit and coat it with heatproof plumber's grease. Place the O-ring over the faucet base and slide it down until it settles into the groove around the faucet body.
    12. Reattach the faucet spout by pressing it back on over the O-ring until it is fully seated on the faucet base.
    13. Install the new valve seals and springs by fitting a spring into each rubber seal and dropping this assembly into its port at the bottom of the faucet body. You may have to finesse them into place with the tip of the screwdriver.
    14. Next, install the new control ball by aligning the peg on the ball with the slot on the faucet housing. Then, place the cam washer over the ball and lever, followed by the cam. The cam usually has an alignment lug that fits into a notch in the faucet body. Press the cam fully into place.
    15. Install the knurled top cap by threading it onto the faucet body and turning it clockwise with channel-lock pliers until snug. Make sure not to overtighten, as this can cause the ball to bind. 
    16. Reattach the single lever handle to over the stem of the ball, and secure it by tightening the Allen screw. 
    17. Turn the water supply on, then operate the faucet to check for leaks. If leaking occurs, it is most commonly because the valve seals are not properly seated in the ports, or because the knurled top cap is not tightened enough.