How to Fix a Dripping Tap Washer
Last updated: 30 September 2026
Turn off the water, remove the tap head, replace the washer, and reassemble the tap.
Overview
A dripping tap is one of the most common household problems in the UK. This guide covers replacing a tap washer on a traditional washer tap.
Step-by-Step Fix
Before beginning any repair, ensure you have isolated power or water supplies. Clear your workspace, gather standard hand tools, and wear appropriate personal protective equipment (PPE).
- Turn off the water supply to the tap using the isolation valve usually located under the sink on the pipe feeding the tap. If there is no isolation valve turn off the main stopcock. Open the tap to release any residual water and confirm the supply is off before starting.
- Remove the tap head by gently prising off the decorative cap on top of the handle using a small flat head screwdriver. This exposes the retaining screw underneath. Use the correct size screwdriver to unscrew it then pull the handle straight off the spindle.
- Use an adjustable spanner to unscrew the large hexagonal nut known as the valve nut that holds the spindle assembly in place. Turn it anti clockwise. Wrap the spanner jaws with tape if you are worried about scratching the chrome finish.
- Pull the spindle assembly straight out of the tap body. Inspect the rubber washer at the bottom of the spindle. It is usually held in place by a small brass screw or a cup. A worn washer will be flattened cracked or hardened.
- Remove the old washer by unscrewing the retaining screw or prising it out of its cup. Take the old washer to a hardware store to buy an exact match for size and thickness. Taps use different washer sizes so matching matters.
- Fit the new washer into position. If the tap uses a ceramic cartridge instead of a rubber washer replacement works differently. Ceramic cartridges are a single unit and cannot be repaired only replaced.
- Apply a small amount of silicone plumbers grease to the spindle thread. This helps the tap operate smoothly and prevents future stiffness. Do not use petroleum based grease as this can damage rubber components.
- Reassemble the tap by reversing the disassembly steps. Screw the spindle back into the tap body and tighten the valve nut firmly but not overtightened. Reattach the handle and the decorative cap.
- Turn the water supply back on slowly and check for leaks around the base of the tap. Open the tap fully and let it run for a minute to flush any debris. If the tap no longer drips the repair is complete.
- If the tap still drips after replacing the washer the valve seat inside the tap body may be worn. A worn valve seat prevents the washer from sealing properly. A seat reamer tool can smooth the seat but if the damage is severe the tap may need replacing.
Common Symptoms & Diagnostic Resolutions
Review the common error codes and operating symptoms below to quickly identify the root cause of the fault before ordering replacement parts.
| Symptom / Code | Likely Root Cause | Recommended Resolution |
|---|---|---|
| Tap still drips after new washer | Worn valve seat preventing proper seal | Use a seat reamer to smooth the valve seat. If the seat is badly damaged the tap will need replacing. |
| Washer wears out quickly | Rough valve seat or excessive water pressure | Inspect the valve seat for roughness and ream it smooth. Check the water pressure and install a pressure reducing valve if needed. |
| Tap handle stiff after reassembly | Spindle overtightened or lack of lubrication | Loosen the valve nut slightly and apply silicone plumbers grease to the spindle thread. |
| Water leaks from under the handle | Worn O ring on the spindle | Remove the spindle and replace the O ring. Apply silicone grease before reassembling. |
Frequently Asked Questions
How do I know which washer to buy?
Take the old washer to a hardware store to match its size type and thickness. Taps use different washer sizes so matching is important. If in doubt take the whole spindle assembly with you.
Can I fix a dripping tap without replacing the washer?
No the washer is the sealing component and it wears out over time. Replacing it is the only reliable fix for a washer tap. Ceramic cartridge taps work differently and require cartridge replacement instead.
How often do tap washers need replacing?
A tap washer typically lasts two to five years depending on water hardness and usage. In hard water areas washers can wear out more quickly due to limescale buildup on the valve seat.
Is it cheaper to fix or replace a dripping tap?
Fixing a dripping tap by replacing the washer is much cheaper than replacing the whole tap. A washer costs less than a pound while a new tap costs thirty to one hundred and fifty pounds.