- Disc faucets may have one or two handles. The water is controlled by openings in the two discs. When the discs are rotated to align, the water flows; when the discs are misaligned, the water shuts off. If the discs wear, the worn discs cause the faucet to leak. Simply turning the handles harder will not stop the leak.
- To repair a leak in a two-handle disc faucet, turn off the water and remove the handle on the side that's leaking.
- Use pliers to pull the disc assembly out of the faucet.
- Beneath the disc unit is the seat assembly, or seal. Replacing this special O-ring may stop the leak.
- You may need to install a whole new disc assembly for faucets that have been used over a long period of time. In this case, all moving parts of the faucet will have been replaced and should last as long as the original discs did. The parts of some disc units snap apart into a separate bonnet assembly and bottom cap.
- To repair a leaking single-handle disc, turn off both the hot and cold water and remove the handle to expose the disc assembly. Take out the screws to lift the assembly out of the faucet.
- You'll notice that beneath the disc unit are three O-ring seals. Though unlikely, water could be leaking between the unit and one of these seals. In this case, you may be able to stop the leak by cleaning the disc assembly and faucet body and installing a new set of seals. If that doesn't work, the entire disc unit must be replaced. This will renew all moving parts.
- Replacing the unit is fairly simple. Place the three O-rings into their recesses in the bottom of the disc unit. Then install the unit and tighten the screws. Finally, replace the handle–and you're done!
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