Leaking Tap Repair in Farnham - Your Complete Summer Guide

Published July 2026 | Leaking Tap Repair Guide

Why This Time of Year Matters for Plumbers in Farnham

July and August are when our engineers see the sharpest increase in leaking tap callouts across Farnham and the wider Surrey area. There are a few reasons for this, and understanding them helps you get ahead of the problem before it turns into something more expensive.

The first factor is heat. When temperatures climb, the rubber washers and ceramic disc cartridges inside your taps expand and contract more than they do in cooler months. Over time, this thermal cycling causes the rubber to harden, crack, and lose its ability to form a proper seal. A washer that was borderline fine in April may be actively failing by mid-summer.

The second factor is garden tap usage. Outdoor taps in Farnham get hammered through the summer - hosepipes, sprinklers, car washing, filling paddling pools. Many of these taps see more use in June through August than they do in the entire rest of the year combined. The increased water flow and pressure puts stress on internal components that haven't been maintained in years, sometimes ever.

The third factor is holiday absence. Families go away and return to find a dripping tap has been running for two weeks unchecked. What would have cost around 80 to 120 pounds to fix when it first started can turn into an urgent callout if water has tracked behind a vanity unit or under a kitchen cabinet. We see this pattern every August without fail.

Surrey's water supply runs at reasonably high pressure compared to some parts of the country. That sustained pressure combined with summer heat creates the ideal conditions for worn tap internals to fail quickly. Catching it early is always cheaper.

The Problems We See Most Often Right Now

When our engineers attend leaking tap jobs in Farnham during the summer months, the faults tend to fall into a handful of categories. Knowing what you're dealing with before a plumber arrives helps you ask the right questions and understand the quote you're given.

Worn rubber washers are the most common cause of a dripping tap. Traditional pillar taps - the type with separate hot and cold controls - use a rubber or fibre washer that presses against a brass seat inside the body of the tap. When the washer deteriorates, the tap drips when closed. Replacing a washer on a standard pillar tap typically costs between 60 and 110 pounds including a callout, and the job itself takes under 30 minutes for an experienced plumber.

Failed ceramic disc cartridges are the culprit in most modern mixer taps. Rather than a rubber washer, these taps use two ceramic discs that rotate against each other to control flow. Ceramic is more durable than rubber, but the discs can chip, develop hairline cracks, or have their O-rings fail. A cartridge replacement on a mixer tap in Farnham commonly costs between 90 and 180 pounds depending on the tap brand and the time required to source a matching cartridge.

Corroded tap seats are less common but worth knowing about. The brass seat inside the tap body that the washer presses against can pit and corrode over years of use. A new washer won't seal properly against a damaged seat, so the drip returns within weeks. A competent plumber can either re-grind the seat with a tap re-seating tool or recommend fitting a new tap entirely if the corrosion is too advanced. Full tap replacement, including fitting, typically runs between 130 and 260 pounds.

Leaking at the base of a mixer tap, rather than from the spout, usually indicates worn O-rings around the body or swivel spout. The fix is often inexpensive, but the water tracking down to the cabinet below can cause damage that costs far more to put right. If you see water pooling under the sink even when the tap appears to be off, get it looked at promptly.

Outdoor tap failures are a particular summer theme. Garden taps in Farnham often haven't been properly maintained and the isolation valve behind the wall may not have been turned since the tap was fitted. When these fail, the repair can involve work inside the wall cavity as well as the tap itself. Budget from 100 to 200 pounds for outdoor tap repairs depending on accessibility.

Preventive Steps You Can Take This Week

Before you call a plumber, there are checks and simple measures you can carry out yourself that may extend the life of your tap components or help you give a better description of the fault when you do book a visit.

1. Check your stop tap turns freely. The main stop tap is usually under the kitchen sink. Turn it off and back on. If it's stiff or won't move, note this before calling a plumber - a seized stop tap complicates any tap repair and may need attention in its own right.
2. Listen as well as look. A tap that drips audibly when the house is quiet is losing more water than you might think. Count the drips per minute and note which tap is affected. This information is useful for our engineers when they assess the job using the Voltrade GoFIX diagnostic tool.
3. Check for secondary leaks. Open the cabinet under each leaking tap and look for water staining, soft patches on the base board, or mould. Secondary water damage under a sink is common in summer when leaks go unnoticed.
4. Turn your outdoor tap off at the isolator. If you have an indoor isolation valve for your garden tap and it's not actively in use, keeping it isolated reduces the continuous pressure on an ageing tap body.
5. Note your tap brand. For mixer taps especially, knowing whether you have a Grohe, Bristan, Hansgrohe, or own-brand tap helps a plumber source the correct cartridge before arriving. The brand is often stamped on the body or printed on the original packaging if you kept it.

What you should not attempt yourself: if the tap has no accessible isolation valve and turning off the main stop tap is required, be confident the stop tap works before starting any disassembly. Farnham properties built in the 1960s through 1990s sometimes have corroded stop taps that look functional but won't seal under pressure. If in doubt, call a plumber before dismantling anything.

Emergency Signs - Do Not Wait on These

Most leaking taps are a nuisance rather than an emergency. But some situations warrant same-day action, and knowing the difference could save you from a significant repair bill.

Water coming from inside the wall behind a tap is never normal. If you see damp patches on tiles or plaster near pipework, or if water is dripping from behind a basin rather than from the tap itself, there may be a failed compression fitting or a cracked supply pipe. This is an urgent job.

A tap that won't turn off at all, even with firm pressure, means water will continue to flow until the supply is isolated. If your stop tap works, turn it off immediately and call a plumber the same day. If your stop tap doesn't work, contact your water supplier - Thames Water covers most of Surrey and has an emergency line for supply-side isolation.

Discoloured or dirty water from a tap in a Farnham property can indicate corrosion inside the pipework, disturbance to the supply line, or a failing internal component that has fragmented. Don't drink the water and don't ignore it.

Sudden sharp increase in drip rate - if a tap goes from a slow drip to a continuous trickle overnight - suggests a component has failed more completely. The flow rate through an open washer seat can increase quickly, and the water finding its way around a failed seal will start tracking to places you can't see.

Any leak near an electrical installation - under-sink water heaters, sockets near a kitchen tap, or a bathroom tap near a shaver socket - needs urgent attention. Water and electricity in proximity is a safety issue, not just a plumbing one.

Preparing for the Next Season

Once your summer tap repairs are sorted, it's worth thinking a few months ahead. Autumn and winter bring their own challenges for Farnham properties, and the taps repaired in July will face different stresses from October onwards.

Outdoor taps are the main concern. Once night temperatures start dropping - typically from late October in Surrey - any water left sitting in an outdoor tap body can freeze and crack the brass or split the pipe behind the wall. The standard advice is to turn off the outdoor tap isolator before the first frost and drain the external section. If your outdoor tap doesn't have an accessible indoor isolator valve, fitting one in early autumn is a sensible investment that costs around 60 to 100 pounds and will protect the tap for the lifetime of the property.

For indoor taps, autumn is a good time to check the flexibility of the braided hoses connecting taps to the supply pipes under sinks. These hoses typically last around ten years, and cracked or swollen hoses are responsible for a significant number of under-sink floods during the autumn and winter when central heating systems come back on and water pressure fluctuates.

If your Farnham property has an older bathroom with the original taps, autumn is a reasonable time to budget for a tap upgrade before winter. Replacing aged pillar taps with a quarter-turn ceramic disc model reduces the chance of a winter leak and typically costs between 150 and 300 pounds for a pair of basin taps fitted.

Seasonal Questions About Leaking Taps in Farnham

Why is my tap dripping more in summer than it was in winter?

Heat causes the rubber and synthetic materials inside tap washers and cartridges to soften slightly, which can allow more water to pass a seal that was borderline functional in cooler weather. In some cases, higher summer water pressure from the mains can also contribute. If the drip rate increases noticeably between spring and summer, the internal components are likely nearing end of life and the tap will need attention before autumn. Continuing to force a stiff or dripping tap to close can damage the brass seat, making the repair more involved.

How much does it typically cost to repair a leaking tap in Farnham?

For a standard washer replacement on a pillar tap, expect to pay between 60 and 120 pounds including a plumber's callout charge. Ceramic cartridge replacement on a mixer tap typically runs between 90 and 180 pounds. If the tap seat is corroded or the tap needs full replacement, costs commonly range from 130 to 260 pounds depending on the tap chosen. Always confirm whether the quote includes parts and whether there's a separate callout charge - some Farnham plumbers include these, others bill them separately.

Can I replace a tap washer myself without calling a plumber?

On a traditional pillar tap with an accessible isolation valve, replacing a washer is a manageable DIY task if you're comfortable turning off the water supply and working with the tap internals. The main risk is forcing seized components and causing additional damage. For modern mixer taps or any tap where the isolation valve hasn't been tested recently, the job is more complex. If you use the Voltrade GoFIX diagnostic tool before deciding, it can help identify the likely fault and whether a trade visit is needed.

Is a slow dripping tap in Surrey worth fixing or should I just replace the whole tap?

In most cases, a dripping tap is worth repairing rather than replacing, particularly if the tap is less than fifteen years old and in good cosmetic condition. A washer or cartridge replacement costs considerably less than a new tap and fitting. Where replacement becomes the better option is when the tap seat is corroded, the tap body is cracked, or spare parts are no longer available for an older model. A plumber should be able to assess which route is more cost-effective once they've seen the tap in person.