Why does my bathroom tap keep dripping?
A dripping bathroom tap is usually caused by a small worn part inside the tap. It may look minor, but leaving it can waste water, stain the basin or bath, and allow a simple repair to become more troublesome.
A washer or ceramic cartridge may be worn
Traditional taps often use a rubber washer to stop the water. As it hardens or wears, water can pass through even when the tap is turned off.
Many modern quarter-turn taps use a ceramic cartridge instead. Dirt, limescale or wear inside the cartridge can prevent it sealing properly. Mixer taps may have one cartridge controlling both hot and cold water.
Where is the water coming from?
A drip from the spout when the tap is off usually points to an internal valve, washer or cartridge. Water appearing around the handle can mean an internal seal has failed.
If water gathers around the tap base, first dry the area and watch it while the tap is used. The cause could be a loose connection, a failed base seal, or splashed water rather than the part controlling the flow.
Should I turn the tap more tightly?
No. Forcing a tap closed can damage its washer, cartridge or handle and may make the repair more expensive. Turn it off normally and arrange a repair if it continues to drip.
Do not take the tap apart unless you know how to isolate the correct water supply. Isolation valves are often fitted beneath a basin, but old valves can seize or leak when disturbed. If you are unsure, use the main stop tap and call a plumber.
Can the tap be repaired or does it need replacing?
Many dripping taps can be repaired with the correct washer, seal or cartridge. The exact part must match the tap, so knowing the manufacturer and model helps.
Replacement may make more sense when parts are unavailable, the tap body is corroded, several components are failing, or you already plan to update the bathroom. A new tap must also suit your basin or bath, water pressure and plumbing connections.
Quick dripping tap checklist
- Dry the tap and identify whether water comes from the spout, handle or base.
- Check whether the hot side, cold side or mixer control is causing the drip.
- Do not force the handle or overtighten the tap.
- Locate the isolation valves and main stop tap before any repair begins.
- Arrange prompt help if water is leaking below the basin, into a unit or through a ceiling.