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Taps can leak or drip from the spout when the ceramic cartridge valve does not fully seal the water flow. The most common cause is debris and limescale buildup inside the cartridge.

When debris or limescale stops the valve from closing completely, even a tiny gap will let water pass through and cause dripping.

Because much of the UK has hard water, taps are fitted with ceramic cartridge valves designed to be serviced or replaced easily. The harder your water or the higher your water pressure, the more often you’ll need to service your tap.

Replacing or servicing a ceramic cartridge valve is usually a simple DIY job and does not normally require a plumber.

How to replace or service a ceramic cartridge valve

1. Unscrew the lever. If your tap has a hot/cold symbol, remove the symbol first.

2. Unscrew the grub screw hidden behind the lever or the hot/cold symbol.

3. Remove the lever body from the tap.

4. On some models, unscrew the chrome cover that hides the brass holding nut.

5. Unscrew the brass holding nut to release the ceramic valve. Clean or replace the valve.

6. Reassemble the tap, making sure the brass holding nut is firmly tightened, but not overtightened.

If you need to buy a new ceramic cartridge valve, contact our support team with your tap details and we’ll advise you on the correct part.