Leaking Tap Repair in Leatherhead - What Actually Happens When a Plumber Shows Up

Published August 2026 | Leaking Tap Repair Guide

A homeowner in Leatherhead noticed a persistent dripping sound coming from the kitchen sink late one evening. At first it seemed minor - the kind of thing you tell yourself you'll sort out at the weekend. But by the end of the week, she'd put a cup under the tap to catch the drips, and the cup was full by morning. When she finally called us, she mentioned the tap had been dripping for at least three weeks. That's a lot of wasted water, and as we'll explain, likely a fair amount of unnecessary damage quietly building up underneath.

What Was Actually Going On - The Diagnosis

A leaking tap is rarely just one problem. When our engineer arrived at the property in Leatherhead, the first job was to identify exactly what type of tap it was and where the leak was originating. This matters more than most people realise, because the repair for a traditional pillar tap with a rubber washer is completely different from fixing a modern ceramic disc cartridge or a worn O-ring on a monobloc mixer tap.

In this case, it was a fairly standard kitchen mixer tap - a single-lever monobloc style, probably around eight to ten years old. The leak was coming from the spout itself, meaning water dripped continuously even when the lever was fully in the off position. That symptom points almost immediately to the internal cartridge. On a mixer tap like this, the cartridge is a sealed unit that controls both the flow and temperature of the water. When it fails, it typically fails gradually - at first you might notice you have to press the lever down harder than you used to, or the tap starts letting a few drips through when closed. Left alone, it gets worse.

Our engineer used the Voltrade GoFIX diagnostic process to log the fault type before touching anything - this helps us track the most common failure patterns across jobs in the Leatherhead area and means the engineer already has a good idea of what parts might be needed. The GoFIX check flagged a probable cartridge failure, which matched what the engineer found when the tap was opened up. The cartridge seals had degraded, most likely accelerated by the relatively hard water that's typical across much of Surrey.

Hard water is genuinely one of the biggest contributors to tap failure in this part of the country. The mineral deposits that build up inside cartridges and on ceramic discs over time cause the internal components to wear unevenly. It doesn't matter how good the tap was when it was installed - hard water will shorten the lifespan of the internal parts. Properties in Leatherhead and the surrounding Surrey area sit in a moderately to highly hard water zone, which means tap internals typically need attention sooner than they would in, say, parts of Scotland or the north of England.

How the Problem Was Resolved

Replacing a mixer tap cartridge is one of the more common jobs our plumbers carry out. The process, when done correctly, follows a clear sequence.

1. Isolate the water supply. The engineer turned off the water at the isolating valves under the sink. If there are no isolating valves under the sink - which is more common in older Leatherhead properties - the stop tap under the stairs or near the water meter has to be used instead. It's worth knowing where yours is before you ever need it in an emergency.
2. Open the tap and release any remaining pressure. Even with the water off, there's residual pressure in the pipes. Opening the tap fully lets it bleed out safely before any work begins.
3. Remove the lever and decorative cover. On most modern mixer taps, there's a small grub screw under a cap on the top of the lever. Undo this and the lever lifts off, exposing the cartridge retaining nut beneath.
4. Extract the cartridge. The retaining nut unscrews - sometimes easily, sometimes with significant resistance if limescale has built up around it. A proper adjustable spanner is essential here. Grips or pliers will damage the tap body.
5. Match and fit the replacement cartridge. This is where things can go wrong for DIYers. Cartridges are not universal. The brand, the tap model, and the cartridge diameter all need to match. Getting the wrong one means the tap won't close properly, or at all. Our engineer carried a range of common cartridge sizes and was able to match the original on-site.
6. Reassemble and test. Once the new cartridge was in and the tap reassembled, the water was turned back on slowly, the tap tested for smooth operation, and the under-sink area checked for any new drips from the isolating valves or supply hoses.

The whole job took around 45 minutes from first inspection to final test. The homeowner also mentioned the bathroom basin tap had started feeling stiff when turning - something that often happens when a ceramic disc is beginning to fail. The engineer took a look and confirmed the discs were worn. Since the parts were already on the van, that job was done at the same visit for a small additional cost.

What This Cost and How Long It Took

Pricing for tap repairs in the UK varies depending on the type of tap, the fault, and whether parts are stocked by the engineer. For the Leatherhead job described above, the total came to around 145 pounds, which covered the callout, labour, and the replacement cartridge. The bathroom tap ceramic disc replacement added around 40 pounds on top, since it was a second job done at the same visit with no additional travel cost.

To give a broader sense of what leaking tap repairs typically cost in 2026:

• Replacing a rubber washer on a traditional pillar tap: commonly between 60 and 100 pounds including callout and labour. The parts themselves cost almost nothing - washers are a pound or two - but the labour and travel time is where the cost sits.
• Replacing a ceramic disc cartridge on a monobloc mixer tap: typically 100 to 180 pounds, depending on the cartridge specification and whether the engineer has the right part on the van.
• Replacing a full tap (where the tap body itself is damaged or corroded): typically 180 to 350 pounds, depending on the tap supplied. Labour to swap a kitchen tap usually runs 60 to 100 pounds on top of the tap cost.
• O-ring replacement on a bath mixer or pillar tap that's leaking around the base or spout join: commonly 70 to 120 pounds.

These figures assume a qualified plumber, not a handyman. For any work involving the water supply to your home, it's worth using someone with proper plumbing experience. The job itself isn't complex in most cases, but poor reassembly or the wrong part can result in a worse leak than the one you started with.

Total time on-site for the Leatherhead job: just over an hour including both taps.

How to Spot the Same Issue in Your Home

Not all leaking taps drip loudly enough to hear. Some of the most costly leaks are slow and easy to miss - especially on taps that aren't used every day, like a utility room tap or a garden outside tap. Here's what to look for.

Signs your tap needs attention

• Dripping from the spout when the tap is closed. The most obvious sign. Even a slow drip - one drip every few seconds - adds up to litres of wasted water per day.
• Water pooling at the base of the tap. If you notice damp around the tap base on the worktop or basin, that usually means an O-ring is failing on the body of the tap rather than the cartridge. It tends to be more visible when the tap is in use.
• The tap lever is harder to operate than it used to be. Stiffness is often the first sign of ceramic disc wear, before any visible drip appears. If you're having to use noticeably more force to turn or push a lever, the discs may be on their way out.
• A hissing sound from the tap when the water is on. This can indicate a partial blockage or a valve that's not opening fully - sometimes related to scale build-up on the cartridge or disc.
• Fluctuating flow from a mixer tap. If the hot and cold balance shifts by itself, or the flow drops and surges, the cartridge is often the cause.

One practical check: put a dry piece of tissue paper on the basin or sink surround around the base of each tap and leave it for a few hours. If it's damp when you come back, there's a slow leak around the body that you might not otherwise notice.

Checking under the sink

It's worth opening the cupboard under your kitchen sink every few months and having a look at the condition of the flexible hoses connecting the tap to the supply pipes. These braided stainless hoses are typically rated for about ten years, but limescale and temperature cycling shorten that lifespan. Look for any white or rust-coloured deposits around the fittings, any visible bulging in the hose, or damp patches on the base of the cabinet. A hose that fails suddenly can release a significant amount of water very quickly - it's one of the more common causes of kitchen flooding in homes across Leatherhead and the wider area.

Lessons - What Every Leatherhead Homeowner Should Know

The homeowner in this case estimated she'd lost about three weeks before calling anyone. That's understandable - a dripping tap feels minor, and it's easy to assume it'll either sort itself out or wait. It won't sort itself out. In most cases it gets progressively worse, and the longer a faulty cartridge or worn washer is left, the more likely you are to end up with water damage to the surrounding surfaces, or a tap that can't be fully closed.

A few things that apply specifically to homes in Leatherhead and across Surrey:

Hard water shortens tap life. If your home doesn't have a water softener, expect to replace tap internals more frequently than the manufacturer's guidance suggests. Cartridges that might last 15 years in a soft water area may need attention after 7 to 10 in hard water regions. This isn't a quality issue with the taps - it's just chemistry.

Know your tap brand before calling. If you can find the brand name on the tap body - Bristan, Grohe, Hansgrohe, Roca, Ideal Standard, and Bristan are all common in UK homes - tell the plumber when you book. It helps enormously with sourcing the right cartridge in advance. Turning up with the wrong part means a second visit and more cost.

Don't overtighten taps after use. It's a habit many people have - giving the tap an extra firm push or turn to make sure it's fully off. With ceramic disc taps in particular, this gradually damages the discs and accelerates failure. If a tap needs to be forced shut, it needs to be repaired, not forced harder.

Old-style taps with rubber washers are actually easier and cheaper to fix. If you have a property in Leatherhead with older traditional taps, don't automatically assume you need to upgrade to modern mixers. A rubber washer costs pennies and takes a competent plumber 20 to 30 minutes to replace. Some homeowners find modern monobloc taps more expensive to maintain in the long run, particularly if replacement cartridges are discontinued for a specific model.

Isolating valves are worth checking now. Every tap in your home should have an isolating valve on the supply pipe underneath it. If you've never tried to turn them, do it - carefully - and check they actually close. Over time they can seize open, which means if the tap or hose develops a serious fault, you'll be heading straight to the main stop tap to shut the water off for the whole house. A plumber can free up or replace a seized isolating valve cheaply, and it's a much better situation to deal with when you're not also dealing with an emergency.

Related Questions

Can I fix a dripping tap myself without a plumber?

On a traditional pillar tap with a rubber washer, yes - it's one of the more accessible DIY plumbing jobs if you're reasonably confident with basic tools and you can isolate the water supply first. Washer kits are available from any hardware shop for a few pounds. Modern monobloc or mixer taps are trickier because sourcing the correct cartridge requires knowing the exact model, and getting it wrong can result in a tap that won't close properly. If you're not certain of the tap brand and model, it's worth getting a plumber in rather than guessing.

How much water does a dripping tap actually waste?

More than most people expect. A tap dripping once per second typically wastes around 5,000 to 8,000 litres of water per year - that's a meaningful amount on a metered water supply. A faster drip or a tap that isn't closing fully can waste considerably more. Beyond the water bill impact, that water has to go somewhere - and on a tap that drips into a basin or sink, it's generally fine. But leaks behind the tap body or under the sink can cause slow water damage to cabinets and surfaces that adds up over months.

How long does a tap cartridge typically last?

In soft water areas, ceramic cartridges commonly last 15 to 20 years with normal use. In harder water areas like much of Surrey, a more realistic expectation is 8 to 12 years before seals begin to deteriorate or the discs show wear. Using a water softener can extend this considerably. Rubber washer taps are different - the washer itself may need replacing every 5 to 10 years, but the cost is negligible and the job is quick.

Is a leaking tap covered by home insurance?

Generally, no - not the tap repair itself. Home insurance policies typically exclude wear and tear, and a failing washer or cartridge falls into that category. However, if a leaking tap or failed supply hose causes water damage to flooring, cabinets, or the ceiling below, that resulting damage may be covered depending on your policy terms. It's worth checking your policy wording, particularly around escape of water. Some home emergency cover policies do include tap repairs, so if you have that add-on it's worth checking before paying out of pocket.