Leaking Tap Repair Guide for Haslemere Homeowners

Published July 2026 | Leaking Tap Repair

You noticed it last night - a steady drip from the bathroom tap that wasn't there last week. By morning you've counted a dozen drips a minute, and now there's a faint rust stain forming around the plughole. It's one of those jobs that feels minor until you start wondering whether it's going to get worse, cost more, or cause damage you can't see yet.

Understanding What's Actually Happening Inside a Leaking Tap

A leaking tap is, fundamentally, a sealing failure. Inside every tap there's a mechanism that controls water flow - and when that mechanism wears out or is damaged, water finds its way past it even when the handle is fully closed. What that mechanism looks like depends on how old your tap is and what type it is.

Older taps - the kind you'll find in many of Haslemere's Victorian and Edwardian terraces - typically use a rubber washer mounted on a brass spindle. You turn the handle, the washer compresses against a valve seat, and the water stops. Over time, the washer degrades, the seat corrodes, and the seal becomes imperfect. Water drips through.

Modern mixer taps work differently. They use ceramic disc cartridges - two precisely machined discs that rotate against each other to control flow. These are generally more durable than rubber washers, but they're not indestructible. When they fail, they tend to fail more dramatically, and the repair usually means replacing the entire cartridge rather than a simple washer swap.

Monobloc kitchen mixers, quarter-turn taps, and thermostatic bar mixers each have their own internal mechanisms - but the principle is the same across all of them. Something designed to create a watertight seal has stopped doing its job.

The Most Common Causes of a Leaking Tap

Our engineers see the same causes come up repeatedly across Surrey homes. Knowing which one applies to your situation helps you work out what kind of repair you're actually dealing with.

Worn or Damaged Washers

This is by far the most common cause in older properties. Rubber washers have a limited lifespan - typically measured in years of regular use rather than decades. They harden, crack, and eventually stop compressing properly against the valve seat. Signs that a worn washer is your problem: the leak is worse when the tap is under pressure, and you can feel or hear the drip increase when the mains supply pressure is higher (first thing in the morning, for example). A replacement washer costs under a pound, though getting to it takes some know-how.

A Damaged or Pitted Valve Seat

The valve seat is the brass surface the washer presses against. Even with a fresh washer fitted, a pitted or corroded seat will keep leaking because the seal surface itself is compromised. This is common in homes with hard water, and parts of Surrey - including areas around Haslemere - have moderately hard water that accelerates mineral build-up on brass components. A damaged seat typically requires regrinding with a special tool or replacing the seat insert entirely.

Failed Ceramic Cartridge

In modern mixer taps, ceramic cartridges can crack or develop chips in the disc surfaces, allowing water to bypass the seal. This is more common than people expect - ceramic sounds bombproof, but the discs are thin and can be cracked by sudden pressure changes or grit in the water supply. When a ceramic cartridge goes, the tap often becomes stiff or difficult to turn before the leak starts. Replacing the cartridge is the correct fix; the part itself commonly costs between 15 and 60 pounds depending on the brand and tap type.

Loose Gland Packing or O-Rings

If the leak is coming from around the handle or the body of the tap rather than from the spout, the problem is usually the gland packing or an O-ring. The gland is the seal around the spindle that prevents water escaping up the stem. On older taps, this is a hemp and grease packing that dries out over time. On newer taps, it's typically a rubber O-ring. Both can be replaced without too much disruption - but the leak location matters, because it tells you which part has failed.

High Water Pressure

Sometimes a tap doesn't leak because anything is broken - it leaks because the mains pressure is higher than the tap mechanism was designed to handle. UK mains pressure typically runs between 1 and 3.5 bar, but surges and local variations can push this higher. Excessive pressure wears out washers and cartridges faster than normal and can cause dripping even in relatively new fittings. If you've had a tap repaired and it's started leaking again within a year, it's worth checking your incoming pressure with a gauge.

Solutions That Actually Work

The right fix depends entirely on what's failed. Here's how repairs typically proceed for each scenario.

Replacing a rubber washer - this is a job many competent DIYers can handle on a traditional pillar tap. The process generally looks like this:

1. Turn off the water supply at the isolation valve under the basin, or at the mains stopcock if there isn't one.
2. Open the tap to release any remaining pressure and drain the line.
3. Remove the tap head - usually by unscrewing a decorative cover cap, then the retaining screw underneath.
4. Use a spanner to unscrew the headgear (the brass body of the tap mechanism) anti-clockwise.
5. The jumper and washer will be at the bottom of the headgear. The washer is held by a small nut - remove it, swap the washer for a matching replacement, and reassemble in reverse order.

Regrinding a valve seat requires a seat grinding tool - a specific piece of kit most homeowners don't own. This is usually a job for an engineer, though the repair itself is quick once someone with the right tools is on site.

Replacing a ceramic cartridge is often simpler than it sounds on modern mixer taps. The challenge is identifying the correct replacement cartridge - dimensions, stem length, and port configuration all need to match. Our engineers use the Voltrade GoFIX diagnostic tool to cross-reference tap brands and cartridge specifications before ordering parts, which saves a second visit for the wrong part. Brands like Grohe, Hansgrohe, Bristan, and Ideal Standard all have their own cartridge families, and getting the wrong one is a very easy mistake to make.

Fixing gland packing or O-rings usually means isolating the supply, disassembling the tap mechanism, and replacing the rubber components. Silicone grease on the new O-rings helps them seat properly and extends their life. This is typically a 30-45 minute job for someone who knows what they're doing.

When You Need a Professional vs When You Can Sort It Yourself

Being honest about this: some tap repairs are within reach for a capable DIYer with patience and the right parts. Others really aren't, and attempting them without experience can make the situation worse - and more expensive.

You can likely tackle it yourself if:

• It's a traditional pillar tap with a simple rubber washer failure
• You can identify and source the correct replacement washer or O-ring
• The isolation valve or stopcock works properly and you're comfortable using it
• You've done basic plumbing jobs before and have the right spanners

Call an engineer if:

• The tap is a modern mixer or thermostatic fitting and you can't identify the cartridge
• The valve seat is damaged - you need the specialist tool
• The leak is from pipework connections rather than the tap mechanism itself
• Your stopcock doesn't fully close, or you're not sure where it is
• The tap is old, heavily corroded, and the headgear looks seized - forcing it risks snapping the fitting
• The leak is getting worse quickly or there's water damage already starting

Many Haslemere homeowners in older properties find that what looks like a simple washer job turns into something more involved once the tap is open - particularly in houses built before the 1980s where the pipework hasn't been touched in decades. There's no shame in getting someone in to look first.

What to Expect from a Tap Repair Visit

A standard tap repair call-out in the Surrey area typically takes between 30 minutes and 90 minutes, depending on the fault and the access involved. Here's what a visit usually covers:

The engineer will diagnose the source of the leak first - not all dripping taps are washer jobs, and the correct diagnosis matters before anything is taken apart. They'll check the water supply, identify the tap type and mechanism, and let you know what parts are needed.

For common repairs like washer replacements and O-ring kits, a good engineer will carry the most common parts in the van. For cartridge replacements on branded mixer taps, the part may need to be ordered - though many engineers stock the most popular Grohe, Bristan, and Ideal Standard cartridges.

In terms of cost: a basic washer replacement in Haslemere or the wider Surrey area typically costs between 80 and 150 pounds for labour, including call-out. Cartridge replacements run higher - commonly between 120 and 250 pounds including the part, depending on the tap brand and cartridge cost. More complex repairs involving valve seat regrinding or fitting new tap bodies naturally sit at the higher end. These are typical ranges, not fixed prices - always ask for a quote before work starts.

A good engineer will also flag any related issues they spot - water pressure problems, corroded supply valves, or signs of damp behind the basin unit - so you're not surprised by anything later.

Common Questions from Haslemere Homeowners

How much water does a dripping tap actually waste?

Quite a lot more than most people expect. A tap dripping at one drop per second typically loses around 10 to 15 litres per day - that's up to 5,500 litres a year from a single tap. If you're on a water meter, which many Surrey households now are, this shows up directly on your bill. A persistent drip is genuinely worth fixing promptly rather than leaving it and assuming it's negligible.

Can I turn off just one tap without cutting water to the whole house?

In most cases, yes - if your plumbing has isolation valves fitted under the basin or sink. These are small inline valves on the supply pipes, operated with a flat-head screwdriver. Turning the slot 90 degrees to run across the pipe closes it. Older properties in Haslemere sometimes lack these, in which case you'll need to use the main stopcock - usually under the kitchen sink or where the supply enters the property.

My tap was repaired six months ago and it's dripping again - why?

If a washer replacement hasn't lasted, the most likely cause is a damaged valve seat that wasn't addressed during the original repair. A worn seat chews through new washers quickly because the sealing surface is rough or pitted. It's also worth checking your mains pressure - consistently high pressure accelerates wear on all internal tap components. If the problem keeps recurring, ask your engineer to inspect the seat and test incoming water pressure at the same time.

Is it worth repairing an old tap or should I just replace it?

It depends on the tap's condition and age. If the tap body is sound and you're just dealing with worn internals, repair is typically the more cost-effective option. If the tap is heavily corroded, the body is cracked, or it's a style you can no longer source parts for, replacement often makes more sense in the long run. Your engineer can usually give you an honest steer on this once they've had a look - most won't push you towards a replacement if a repair will do the job properly.