Leaking Tap Repair Guide for Cambridge Homeowners

Published July 2026 | Leaking Tap Repair Guide

You wake up at 2am to the sound of dripping from the bathroom - by morning, you've told yourself it's not that bad. Then you spot the pink limescale staining around the drain and realise the tap has been leaking for longer than you thought. It's one of the most common calls our engineers take across Cambridge, and the longer it's left, the more water you waste and the more potential damage accumulates underneath.

What Is Actually Happening When a Tap Leaks

A leaking tap is a failure in the mechanism designed to stop water flow when you close the tap. Every tap - whether it's a traditional pillar tap in a Victorian terrace in Romsey or a sleek single-lever mixer in a new-build out in Trumpington - relies on an internal seal to block water when turned off. When that seal wears out, water finds a way through.

The location of the leak tells you a lot. A steady drip from the spout usually means the internal sealing component has failed. A leak from around the base of the tap or from where it meets the sink points to the O-ring or packing around the tap body. A leak from the supply pipe connections underneath is a separate issue entirely - but one that needs addressing quickly to avoid water damage to your kitchen or bathroom cabinet.

When our engineers assess a tap, they use the Voltrade GoFIX diagnostic tool to log the fault type, the tap model where identifiable, and the most likely repair before opening a toolkit. This approach means we can usually carry the right parts on the first visit rather than making multiple trips.

The Most Common Causes of a Leaking Tap

Tap leaks almost always come down to one of a handful of causes. The age of your tap, the water hardness in your area, and how frequently the tap gets used all affect how quickly components wear out. Many parts of Cambridgeshire have moderately hard water, which accelerates limescale build-up and can speed up the deterioration of washers and seals over time.

Worn or Damaged Washer

The worn washer is by far the most common cause of a dripping tap, particularly in older compression-style taps which are still common in Cambridge's older housing stock. Every time you turn the tap off, the washer gets pressed against the valve seat. Do that thousands of times over a few years and it starts to deform, crack, or harden. Once the washer can no longer form a proper seal, water gets through. Replacing it is usually a ten-minute job - provided the tap internals aren't corroded.

Worn O-Ring

O-rings are rubber rings that seal around the tap spindle. When they wear or perish, you typically see water leaking from around the tap handle or at the base of the spout rather than from the spout itself. This is common in cartridge-style mixer taps, which are popular in Cambridge's newer housing developments. O-rings are inexpensive to replace - the complication is usually access, as you need to remove the handle and sometimes the cartridge to reach them.

Failing Cartridge

Modern mixer taps - the single-lever type found in most kitchens built in the last twenty years - use a cartridge to control both temperature and flow. When the cartridge wears or its internal seals fail, the tap drips or leaks around the body. Cartridges vary significantly by brand and model. Replacing one means matching the exact cartridge, which isn't always easy if the tap is an older model or an own-brand unit from a kitchen supplier. Common brands like Grohe, Bristan, and Pegler are well stocked; budget or superstore own-brand taps can be trickier to source parts for.

Corroded Valve Seat

The valve seat is the point where the washer meets the tap body to form a seal. In hard water areas like much of Cambridgeshire, limescale deposits on the valve seat create an uneven surface that prevents a proper seal - even with a brand new washer. If you've had a washer replaced and the tap is still dripping within weeks, a corroded or pitted valve seat is often the explanation. Our engineers can resurface the seat with the right tool in most cases, or recommend a seat replacement where the tap design allows it.

Loose or Worn Packing

In older taps - particularly traditional pillar taps common in Cambridge period properties and conservation area homes - a packing nut holds packing material around the spindle. When this packing compresses or wears, you get a leak from around the stem of the tap rather than the spout. Tightening the packing nut sometimes resolves it temporarily; replacing the packing properly is the more lasting fix.

Solutions That Actually Work

The right repair depends entirely on what type of tap you have and which component has failed. Here's how we approach the most common scenarios.

For a compression tap dripping at the spout:

1. Turn off the water supply at the isolation valve under the sink, or at the main stopcock if the isolation valve isn't working.
2. Open the tap to release pressure and drain any remaining water in the line.
3. Remove the tap handle - usually held by a screw hidden under the decorative cap.
4. Unscrew the packing nut and withdraw the spindle.
5. Remove the old washer (held by a small nut at the base of the spindle) and fit the correct replacement size.
6. Reassemble in reverse, turn the water back on, and test for drips.

This is a repair many confident DIYers tackle themselves. The main risks are over-tightening the packing nut on reassembly, or discovering the internals are more corroded than expected. At that point, it's better to call a plumber rather than force anything and risk damaging the tap body or the supply pipework.

For a cartridge mixer tap: The cartridge needs to be sourced first. Our engineers carry a range of common cartridges, but for less common brands a part may need to be ordered. The repair itself - removing the old cartridge and fitting the new one - typically takes under an hour once the right part is in hand.

For ceramic disc taps: Ceramic disc taps have a reputation for being low-maintenance, but the discs can crack (usually from thermal shock or heavy-handed operation) or become clogged with limescale. Replacing the disc cartridge is the standard fix. Given how sensitive ceramic mechanisms are to limescale, fitting an in-line filter is sometimes worth considering in areas where Cambridge Water supply runs particularly hard.

When to Call a Plumber and When to Sort It Yourself

Not every leaking tap needs a professional. But there are situations where attempting the repair yourself risks making things worse or creating a more expensive problem down the line.

You can likely tackle it yourself if:

• It's a traditional compression tap and you're comfortable with basic tools
• You can locate and operate the isolation valve confidently
• The tap internals look accessible and aren't heavily corroded
• You have time to source the correct washer or O-ring before starting

Call a plumber if:

• The leak is coming from the pipework under the sink rather than the tap itself
• You've replaced the washer and it's still dripping - this often signals a valve seat problem
• The tap is seized and forcing it risks damaging the supply pipe
• It's a ceramic disc or cartridge tap and you can't identify the replacement part
• There's any sign of water damage to the cabinet below - this needs prompt attention to prevent mould
• Your isolation valves don't work, meaning you'd need to shut off the mains to do the job safely

Cambridgeshire homes vary widely in age and plumbing style - from Victorian terraces in the city centre to 1960s estates in Arbury and new builds on the outskirts towards Cambourne and Bar Hill. The type of tap, the condition of the supply valves, and the age of the pipework all affect whether a DIY fix is a realistic option. If there's any doubt, getting a professional assessment early is usually cheaper than dealing with secondary damage later.

What to Expect from a Tap Repair Visit

A tap repair by a qualified plumber is typically a short job - usually between 30 minutes and 90 minutes depending on the fault and the tap type. A simple washer or O-ring replacement on an accessible, modern tap sits at the shorter end. If cartridges need ordering or there's additional valve seat work involved, it may require a follow-up visit once parts arrive.

In terms of cost, a tap repair in Cambridge typically costs between 80 and 160 pounds for labour, with parts on top. A standard washer or O-ring costs very little - it's the call-out and labour that makes up the majority of the price. Cartridge replacements vary more depending on the brand; common cartridges for Grohe, Bristan, or Pegler taps are usually stocked and reasonably priced, but a less common cartridge can cost between 20 and 60 pounds for the part alone. If the tap is beyond economical repair, a full replacement typically costs between 150 and 300 pounds fitted, depending on the tap you select.

Our engineers always explain what they've found and what the repair involves before starting work. If a replacement would be better value than a repair, we'll tell you upfront with a clear price so you can make an informed decision.

Common Questions from Cambridge Homeowners

How much does it cost to fix a leaking tap in Cambridge?

Labour for a tap repair in Cambridge typically falls between 80 and 150 pounds, depending on complexity and the plumber's call-out rate. Parts are usually extra - a washer costs very little, but a branded cartridge can add 20 to 60 pounds to the total. If the tap needs full replacement, budget between 150 and 300 pounds fitted, depending on the tap model you choose. Getting a clear quote before work starts is always the sensible approach.

Is a dripping tap really wasting that much water?

A tap dripping once per second commonly wastes several thousand litres of water per year - and if you're on a water metre, that translates directly into money. Cambridge Water and other regional suppliers encourage prompt repairs for exactly this reason. The cost of wasted water often exceeds the cost of the repair itself within a few months, which makes fixing a leaking tap one of the better-value home maintenance jobs you can do.

Can I fix a leaking tap without turning off the mains?

In most cases you won't need to turn off the mains, provided the isolation valves under the sink are working. These small valves - typically operated with a flat-head screwdriver on the supply pipe - let you isolate just that tap without cutting water to the rest of the house. If the isolation valves are seized or absent, the mains stopcock will need to be turned off temporarily. It's worth knowing where your stopcock is before any plumbing work begins - in most Cambridge homes it's located under the kitchen sink or in a utility cupboard.

What if my tap is still dripping after I've replaced the washer?

A tap still dripping after a new washer usually points to a damaged or pitted valve seat - the surface the washer presses against when the tap is closed. If that surface is scored or corroded, even a perfect new washer won't seal properly. Our engineers can resurface the valve seat with a reseating tool in most cases. If the seat is beyond resurfacing, replacing the tap body or fitting a new tap entirely may be the more practical route, particularly if the tap is already several years old.