Repairing a leaky bathroom or kitchen faucet is generally not a hard job, but it is sometimes complicated by the fact that there are so many different faucet designs, each with different types of parts and requiring different repair methods. Many single-handle faucets use some form of interior ball or cartridge; with most of these, repair is a fairly simple matter of replacing the faucet cartridge or replacing the ball or its parts. A disk faucet, however, uses a different design that requires a different repair procedure. From the outside, disk, cartridge, and ball faucets look similar. Like most cartridge or ball faucets, a disk faucet usually has a single handle (though there are some double-handle models). But while ball faucets have a handle that rotates freely in all directions, a ceramic disk faucet has a distinctive operating motion that includes a smooth forward-back action, along with a left-right rotation. This is similar to the way standard cartridge faucets move, but you'll notice that a ceramic disk faucet has a shorter, wider body, not the upright cylindrical shape common to cartridge faucets. Inside the faucet body, a disk faucet uses a special type of sealed cartridge with two closely fitting ceramic disks, one fixed, the other moveable. Moving the handle slides the disks around within their cartridge, aligning the holes in various ways to change the ratio of hot and cold water getting through the disks to the faucet's mixing chamber. It is a very dependable design that requires less attention than standard ball-type or cartridge faucets. In this project, we describe how to disassemble and clean the parts of a typical single-handle ceramic disk faucet. In many cases, a simple cleaning of the seals and water ports will fix a faucet that is leaking. Sometimes, though, a simple cleaning will fail to fix the leaky faucet. In this case, the problem may be seals that are damaged or that have lost their resiliency. Unlike other faucets, where seals, springs, and other parts are often offered in repair kits specified for particular faucet models, the seals for most ceramic disk faucets are not sold this way. Nor will you find suitable seals in the universal kits that offer a wide selection of washers, seals, and O-rings. If you find that the seals on your ceramic disk cartridge are cracked or badly worn, the fix is generally to just buy a new cartridge and install it.
The Spruce / Kevin Norris
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How to fix leaky kitchen faucet single handle
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