How to Stop a Dripping Tap Without Guesswork

A tap that drips once every few seconds can sound minor, until the quiet ticking keeps you awake or you notice the water bill creeping up. Knowing how to stop a dripping tap can save water and prevent a small worn part becoming a more awkward leak beneath the basin. The key is identifying the tap type first, isolating the water properly and knowing where a simple repair ends and a professional repair begins.

Why a dripping tap should not be ignored

Most dripping taps are caused by a seal, washer or ceramic cartridge that no longer closes the water flow fully. Limescale, normal wear and a stiff tap mechanism can all contribute. Even a slow drip wastes a surprising amount of water over weeks and months, particularly where the tap is left dripping overnight.

There is also a practical reason to act promptly. If a tap has to be turned tighter and tighter to stop it dripping, the internal valve may be damaged. Forcing the handle can strip the spindle, crack a ceramic cartridge or create a leak around the base of the tap. A repair that might have needed a small replacement part can then require a new tap.

The right fix depends on whether you have a traditional washer tap, a ceramic disc tap, a mixer tap or a monobloc tap with one lever. They can look similar from above, but their internal parts work differently.

Before you stop a dripping tap, isolate the water

Do not take a tap apart while the supply is live. Before removing any cover, handle or valve, turn off the water feeding that tap. Many basin and kitchen taps have small isolation valves on the pipework beneath the sink. Use a flat screwdriver to turn the slot a quarter turn so it sits across the pipe, then open the tap to make sure the flow has stopped.

If there are no isolation valves, use the internal stopcock. This is commonly found under the kitchen sink, in a utility cupboard or near where the mains supply enters the property. Turn it clockwise carefully, then open the hot and cold taps to release pressure. In older homes around Dartford, North Kent and South East London, a stopcock can be stiff or partly seized through lack of use. Do not force it hard, as it may start leaking or fail to close again.

Put the plug in the basin before you begin. Small screws, clips and washers have a habit of disappearing down the waste. Lay down a towel too, both to protect the ceramic and to catch any remaining water.

Identify the type of tap you have

Traditional compression tap

A traditional tap usually has separate hot and cold handles that turn through several rotations. Inside is a rubber washer held against a valve seat. When the washer wears down, hardens or becomes uneven, water can pass through and drip from the spout.

This is often the most straightforward type to repair. However, a new washer will not solve the problem if the brass valve seat is rough, pitted or damaged. In that case, the seat may need resurfacing or the whole valve assembly may need replacing.

Ceramic disc tap

Ceramic disc taps generally turn only a quarter or half turn. They use two closely fitting ceramic discs to control the flow. Their cartridges are durable, but grit, limescale and worn internal seals can still cause a persistent drip.

Unlike a washer tap, ceramic disc mechanisms are normally repaired by replacing the complete cartridge rather than changing a single washer. Cartridges vary in size, spline pattern and opening direction, so taking the old one to a merchant or noting the tap make can avoid buying the wrong part.

Mixer and monobloc taps

A mixer tap may have separate handles feeding one spout, while a monobloc tap typically has one lever controlling both temperature and flow. The fault may be in a cartridge, valve head or O-ring. If water is dripping from the spout, the internal control component is the likely cause. If water appears around the handle or tap base, seals and O-rings are more likely to be at fault.

Kitchen mixer taps can be more complicated because of pull-out spray hoses, filter connections or rigid pipework in tight cupboards. If access is poor or the tap is badly corroded, replacement is often more sensible than spending time dismantling a failing fitting.

How to repair a traditional dripping tap

Once the water is isolated, remove the decorative cap on the handle. It may simply lift off with a small flat screwdriver, revealing a retaining screw beneath. Undo the screw, lift off the handle and remove any shroud or cover over the valve.

Use an adjustable spanner to undo the valve head. Wrap the chrome finish with a cloth first to reduce the risk of marking it. Lift the valve out and inspect the washer at its lower end. A worn washer may look flattened, split, rough around the edge or misshapen.

Replace it with a washer of the same size and refit the valve carefully. Do not over-tighten the valve when reassembling. Open the isolation valve or stopcock slowly, check around the handle and beneath the basin for leaks, then test the tap. If it still drips, the valve seat or valve head is probably the issue rather than the washer alone.

Replacing a ceramic cartridge

The early steps are similar: isolate the water, remove the handle and expose the cartridge. Some cartridges are held by a retaining nut, while others have a clip or collar. Take a clear photograph before removing anything, especially if the tap has several spacers or seals.

Once removed, compare the old cartridge closely with the replacement. It must match in diameter, height, spline count and hot/cold orientation. Fit the new cartridge squarely, ensuring seals sit correctly, then reassemble the tap without forcing parts into place.

After restoring the supply, open the tap gently at first. A small amount of trapped air or discoloured water can appear briefly after isolation, particularly in older pipework. Run the tap for a minute and inspect it for drips at the spout, handle and pipe connections.

When a DIY tap repair is not the right choice

A basic washer or cartridge repair can be reasonable for a confident homeowner with the right tools. It is less suitable where the tap is heavily corroded, the isolation valve does not work, the stopcock is seized or pipework starts leaking when disturbed.

Call a plumber if the drip continues after a replacement part, if the tap body is cracked, or if water is escaping under the worktop, behind a basin or into a vanity unit. These hidden leaks can damage cupboards, flooring and walls before they become obvious. You should also seek help if the tap is connected to an unvented hot water system and you are unsure which valves control it.

For landlords and property managers, a dripping tap is worth logging and resolving early. It protects the property, reduces avoidable water use and gives tenants confidence that reported maintenance issues are being handled. Keeping a note of the tap make and previous repair can also make future maintenance faster.

Preventing the next drip

Avoid closing taps with excessive force. A tap should shut off with normal hand pressure; if it only stops when tightened aggressively, it needs attention. Cleaning aerators and wiping away limescale around handles can also help keep the mechanism moving freely, although descaler should not be allowed to sit on finishes or seals for longer than the product instructions allow.

Where a tap is old, loose at the base or repeatedly failing, replacement can be better value than repeated repairs. A quality new tap fitted correctly can improve ease of use and reduce the chance of leaks in the cupboard below. PlumbTech365 can assess whether a repair is worthwhile or whether replacement is the more reliable option, with clear advice before work begins.

A dripping tap rarely becomes an emergency overnight, but it is one of those household jobs that rewards early action. Stop the water safely, repair only what you can identify with confidence, and arrange professional help before a small drip turns into a damaged unit or a hidden leak.