How to Fix a Dripping Tap

The Hidden Cost of a Dripping Tap

That steady drip might seem minor, but a tap dripping once per second wastes over 15,000 litres of water a year. Beyond the water bill, a persistent drip can stain sinks, damage surfaces and even lead to mould growth in the surrounding area.

Common Causes

Most dripping taps are caused by one of these issues:

• Worn washer - the most common culprit in traditional taps
• Damaged O-ring - causes leaks around the base of the tap
• Corroded valve seat - the surface where the washer sits becomes uneven
• Worn cartridge - in mixer taps and modern ceramic disc taps

Before You Start

If you want to attempt a repair yourself, gather these tools:

• Adjustable spanner
• Flat-head and cross-head screwdrivers
• Replacement washer or cartridge (take the old one to the hardware shop for matching)
• Cloth or towel

Important: Always turn off the water supply before working on any tap. Turn off the isolation valve under the sink, or the main stopcock if there is no isolation valve.

Step-by-Step Guide for Traditional Taps

1. Turn off the water and open the tap to drain remaining water
2. Remove the tap handle - prise off the decorative cap and unscrew the retaining screw
3. Unscrew the headgear nut using an adjustable spanner, turning anti-clockwise
4. Remove the old washer from the bottom of the headgear
5. Fit the new washer and reassemble in reverse order
6. Turn the water back on and check for leaks

When It Is Not a Simple Washer

Modern mixer taps and ceramic disc taps use cartridges instead of washers. These require the correct replacement cartridge for your specific tap model. If you are unsure which part you need or find corrosion inside the tap body, it is best to call a professional.

Signs You Should Call a Plumber

• The tap continues dripping after replacing the washer
• You notice corrosion on internal parts
• The tap body itself is cracked or damaged
• You have a mixer tap and are unsure how to disassemble it
• Multiple taps are dripping, which may indicate a pressure issue

Professional Tap Repairs in South London

Our plumbing service covers all types of tap repairs and replacements across South London. Whether it is a Victorian-era tap in a Brixton terrace or a modern mixer in a Clapham flat, we carry common parts and can usually fix the problem in a single visit. We serve homeowners across Battersea, Borough, Kensington and beyond.