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Kerox is a global market leader in the production of ceramic tap valves (cartridges and disc valves) for taps and showers, founded in 1982. The European company supplies components to various tap manufacturers. Maintenance: Clean the valve with mild soapy water or a gentle citric acid cleaner; harsh cleaning agents are not recommended. Always lubricate the rubber seals with tap grease.
A Kerox cartridge is the ceramic valve inside a tap that controls the water flow and the mix between hot and cold water. You'll find this part underneath the tap handle or knob. Kerox supplies this valve as a separate component to tap manufacturers, which means you can replace it on its own without having to buy a whole new tap.
A worn or damaged cartridge usually shows up as a dripping tap, a stiff handle, or a handle that no longer shuts off properly. The ceramic discs inside don't normally wear out quickly, but limescale or debris between the discs can cause the exact same symptoms. So it's worth cleaning the valve first to see if that solves the issue before you replace it.
Kerox cartridges come in various sizes and versions, depending on the tap brand and model they're designed for. When ordering, pay attention to the diameter of the valve and the connection type so the part fits your tap correctly.
Turn off the water supply before removing the tap handle. Take off the cover cap and the fixing screw, pull out the old valve, and fit the new Kerox cartridge in the same position. Lubricate the rubber seals with tap grease before reassembling the handle so the valve keeps turning smoothly.
A Kerox cartridge controls the water flow and the mix between hot and cold water in your tap. It sits underneath the handle or knob and consists of ceramic discs that rotate against each other to open, close, or mix the water. If this part is worn, you'll often notice it as a dripping or stiff-turning tap.
The right valve depends on the brand and model of your tap, as well as the diameter and connection type of the existing cartridge. Remove the old valve from the tap and compare the dimensions and features, or tell us the brand and model of your tap so we can help you find the correct part. The valve usually has a type code printed on its side.
If your tap still leaks after replacing the valve, the cause is often worn or damaged rubber seals elsewhere in the tap, or a cartridge that doesn't fit perfectly. Check whether the cartridge has been fitted straight and correctly, and whether the rubber seals have been lubricated with tap grease.
Yes, replacing a cartridge is a job you can do yourself with basic tools. Turn off the water supply, remove the handle and cover cap, swap the valve, and reassemble everything in reverse order. Make sure the valve is fitted in the correct position so the handle lines up properly with the tap function again.
A ceramic Kerox valve is built to last a long time, since the discs barely wear under normal use. Its lifespan does depend on water quality though: hard water with a lot of limescale can build up faster between the discs, which may affect performance over time.
Kerox supplies valves to a range of tap manufacturers, so you'll find their cartridges inside taps from several different brands. Since versions vary by brand and model, it's best to check the size and type of your existing valve before ordering a replacement.
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