How to Fix a Dripping Tap: UK Homeowner Guide

A dripping tap is easy to ignore. It is just a drip, right? But one drip per second adds up to over 5,000 litres of wasted water a year. On a water meter — which most Doncaster properties are on these days — that is money literally going down the drain. Plus the constant drip-drip-drip will drive you round the bend, especially at night when the house is quiet.

The good news is that fixing a dripping tap is one of the most satisfying DIY jobs you can do. Most can be sorted in under an hour with basic tools. This guide covers the four main types of tap found in Doncaster homes and how to fix each one.

Tools You Will Need

Gather these before you start. There is nothing worse than having your tap in pieces and realising you need something from the shops.

• Adjustable spanner
• Flat-head and cross-head screwdrivers
• Replacement washer or cartridge (take the old one to the shop to match it — Screwfix and Toolstation in Doncaster carry most common sizes)
• Pliers
• Old towel or cloth
• Penetrating oil (WD-40 or similar) for stubborn fittings

Step 1: Turn Off the Water

Before you touch the tap, turn off the water supply. For kitchen taps, there are usually isolation valves on the hot and cold pipes under the sink — turn them with a flat-head screwdriver until the slot is across the pipe. For bathroom taps, check under the basin or bath. If there are no isolation valves (common in older Doncaster properties), you will need to turn off the stopcock. The main stopcock is usually under the kitchen sink or in the front hallway.

Once the supply is off, open the tap to drain any remaining water and relieve pressure.

Step 2: Identify Your Tap Type

How you fix the drip depends on what type of tap you have. There are four main types found in Doncaster homes:

Compression Taps (Traditional Washer Taps)

The most common type in older Doncaster properties. These have separate hot and cold handles that you turn clockwise to close. They use a rubber washer at the base of the spindle to create the seal. When the washer wears out, the tap drips.

How to fix:

• Remove the decorative cap on top of the handle (prise it off with a flat screwdriver)
• Undo the screw underneath and pull off the handle
• Use your adjustable spanner to unscrew the headgear nut (the large hexagonal fitting)
• Lift out the spindle assembly — the washer is at the bottom, held on by a small nut or pressed into a recess
• Replace the old washer with a new one of the same size (most kitchen taps use a half-inch washer, bathroom basins use a three-eighths-inch washer)
• Reassemble in reverse order, making sure the headgear nut is snug but not overtightened

While you have the spindle out, check the valve seat inside the tap body. If it is scored or pitted, even a new washer will not seal properly. A tap reseating tool can smooth it out, or you may need to replace the tap.

Ball Taps (Single Lever with Ball Mechanism)

Common in kitchen mixer taps. These use a rotating ball with springs and rubber seats to control flow. They have more parts than compression taps but are still repairable.

How to fix:

• Remove the handle (usually a small grub screw under a decorative cover)
• Unscrew the cap and collar assembly
• Remove the ball, cam, and packing
• Inside you will see two spring-loaded rubber seats in the base of the tap body — prise these out with a flat screwdriver
• Replace with new seats and springs (sold as a kit, usually available at Doncaster plumbing merchants or online)
• Reassemble, making sure the ball sits correctly in the seats

Ceramic Disc Taps

Modern quarter-turn taps use two ceramic discs that slide against each other to control water flow. They are common in taps fitted in Doncaster homes from the 2000s onwards. Ceramic disc taps rarely drip, but when they do, the cartridge usually needs replacing rather than a simple washer swap.

How to fix:

• Remove the handle (grub screw underneath or under a decorative cap)
• Unscrew the ceramic cartridge by hand or with a spanner
• Take the cartridge to a plumbing supplier to get an exact replacement — they vary between manufacturers and sizes, so matching it exactly is important
• Before fitting the new cartridge, clean the inside of the tap body to remove any grit or limescale
• Insert the new cartridge, making sure it is oriented correctly (the hot and cold cartridges are different)
• Reassemble and test

Tip for Doncaster: Doncaster has moderately hard water. Limescale build-up on ceramic discs is a common cause of drips in this area. Sometimes soaking the cartridge in white vinegar for an hour and cleaning the faces with a soft cloth is enough to restore the seal without replacing it.

Cartridge Taps (Single Lever Mixer)

Many modern single-lever mixer taps use a cartridge mechanism that controls both temperature and flow. When these drip, the entire cartridge needs replacing.

How to fix:

• Remove the handle (look for a grub screw, usually under a hot/cold indicator cap)
• Unscrew or unclip the cartridge retaining nut
• Pull the cartridge straight out
• Take it to a plumbing supplier for an exact match — cartridges are manufacturer-specific and getting the wrong one is a waste of time and money
• Insert the new cartridge, align the lugs correctly, and secure the retaining nut
• Refit the handle and test

Reassembly and Testing

Whichever tap type you have fixed:

• Make sure all fittings are snug but not overtightened — forcing brass fittings can crack them
• Turn the water supply back on slowly and check for leaks around the headgear or cartridge
• If there are small drips from the fittings, try tightening a fraction more or wrap the threads with PTFE tape
• Run the tap for a full minute to clear any debris, then close it and wait five minutes to confirm the drip has stopped

When to Replace Rather Than Repair

Sometimes a tap is beyond economic repair. Consider replacing rather than fixing if:

• The tap body is corroded or the chrome is heavily peeling
• The valve seat is badly damaged and a reseating tool cannot smooth it
• You cannot find replacement parts for an obscure or discontinued brand
• The tap is already over fifteen to twenty years old
• There are leaks from the body of the tap rather than the spout

A decent replacement tap for a Doncaster home costs between thirty and one hundred pounds depending on style and quality. We fit taps daily across Doncaster — including supply if needed. Takes about an hour for a straightforward swap.

Common Mistakes to Avoid

• Not turning off the water first. We have attended callouts where people have taken taps apart with the supply on. The resulting fountain is not funny at the time.
• Overtightening the headgear nut. This cracks the brass or damages the thread, turning a five-pound repair into a new tap.
• Using the wrong washer size. Always take the old one with you to the shop.
• Forgetting to check the valve seat. A new washer on a damaged seat will drip again within weeks.
• Using excessive force on corroded fittings. Apply penetrating oil and wait twenty minutes before trying again. If it will not budge, call a plumber rather than snapping it off.

If you would rather have a professional sort it, we fix dripping taps across Doncaster every day. Quick job, fair price, no callout charge on booked appointments.