How do I check for a hidden water leak myself?

The simplest test is to turn off all water-using appliances and taps, then check your water meter. If the meter is still moving after 30 minutes, you have a leak somewhere on your property. You can also look for unexplained damp patches, listen for running water sounds and monitor your water bill for unusual increases.

How much does leak detection cost in Exmouth?

Professional leak detection in the Exmouth area typically costs between £150 and £400 depending on the complexity. This usually includes thermal imaging or acoustic detection to pinpoint the leak without ripping up floors or walls. The detection cost is separate from any repair work needed.

Will my home insurance cover a water leak?

Most home insurance policies cover damage caused by a sudden leak (known as an escape of water), but they typically do not cover the cost of finding or repairing the leak itself, nor damage caused by gradual seepage or poor maintenance. Check your policy wording or call your insurer before making a claim.

Can a hidden leak cause structural damage?

Yes. Left unaddressed, a hidden water leak can cause serious damage including rotting timber, crumbling plaster, weakened floor joists and even subsidence. It also creates ideal conditions for mould and damp, which can affect the health of anyone living in the property. Early detection saves money and prevents bigger problems.

Who is responsible for a leak on the water supply pipe?

You are responsible for the water supply pipe from the boundary of your property to your home. South West Water is responsible for the pipe from the water main to your property boundary. If you suspect a leak on the public side, contact South West Water on 0344 346 2020.

How do plumbers find hidden leaks?

Professional plumbers use specialist equipment including thermal imaging cameras, acoustic listening devices and moisture meters to locate leaks without invasive work. Thermal cameras detect temperature differences caused by escaping water behind walls and under floors. Acoustic equipment amplifies the sound of water escaping from pressurised pipes.

5 Signs You Have a Hidden Water Leak

A hidden water leak can go undetected for weeks or months, quietly damaging your property and adding to your water bill. Spotting the warning signs early can save you hundreds in repair costs. Here are the five signs every Exmouth homeowner should know.

Find Leak Detection Specialists

5 Warning Signs of a Hidden Leak

Most hidden leaks share a handful of telltale signs. If you notice one or more of these in your home, it is worth investigating further.

Your Water Bill Has Jumped

If your South West Water bill has increased noticeably without a change in usage, a hidden leak is one of the most likely explanations. Even a small drip from a cracked pipe can waste thousands of litres over a billing period. Compare your current bill to the same quarter last year - a spike of 20 per cent or more with no obvious cause warrants investigation.

Damp Patches on Walls or Ceilings

Unexplained damp spots, discolouration or peeling paint on walls and ceilings often point to a leaking pipe behind the surface. In older Exmouth properties, copper and lead pipes can corrode over time, causing pinhole leaks that are invisible until water damage appears. Pay close attention to areas around bathrooms, kitchens and where pipes run through walls.

Low Water Pressure

A sudden drop in water pressure - especially if it affects the whole house rather than just one tap - can mean water is escaping from a cracked or split pipe before it reaches your fixtures. If your neighbours on the same South West Water supply have normal pressure, the problem is likely within your property.

Running Water Sounds When Nothing Is On

If you can hear the faint sound of running or dripping water when every tap and appliance is turned off, that is a strong indicator of a hidden leak. Try turning everything off late at night when the house is quiet and listen near walls where you know pipes run. Even a faint hissing sound behind a wall should be checked.

Musty Smell or Mould Growth

A persistent musty or damp smell in a room - particularly one that was not there before - suggests moisture is building up somewhere hidden. Mould growing on skirting boards, behind furniture or in corners is another red flag. Left unchecked, hidden leaks create the perfect conditions for mould, which can affect both your property and your health.

The Water Meter Test

Not sure if you have a leak? This simple test takes 30 minutes and will tell you whether water is escaping from your system.

1Turn off every tap, appliance and toilet cistern in your home
2Find your water meter (usually under a small cover near your front boundary)
3Note the meter reading and the position of the dial
4Wait 30 minutes without using any water
5Check the meter again - if the reading has changed, water is escaping somewhere

If your meter reading changed, you have a leak on your side of the supply. The next step is to call a local plumber with leak detection experience to pinpoint the source.

What Causes Hidden Water Leaks?

Understanding the common causes can help you assess risk, especially in older Exmouth properties where ageing pipework is widespread.

Corroded Pipes

Many Exmouth homes, particularly those built before the 1980s, still have copper or even lead pipework. Over decades, corrosion weakens the pipe walls and creates pinhole leaks that are hard to spot until damage becomes visible.

Pipe Joint Failures

Joints between pipes are natural weak points. Temperature changes, water pressure fluctuations and general ageing can cause soldered or compression joints to weaken and start leaking.

Water Pressure Surges

High or fluctuating water pressure puts extra strain on your plumbing system. Over time, this stress can cause pipes and fittings to crack, particularly in older installations.

Tree Root Damage

Tree roots seek out moisture and can grow into underground water supply pipes through tiny cracks. This is a common issue in Exmouth properties with mature gardens, particularly along Exeter Road and The Avenues where established trees line the streets.

Poor Previous Plumbing Work

DIY plumbing repairs or work done by unqualified tradespeople can fail over time. Badly soldered joints, incorrect fittings or incompatible materials are common culprits behind hidden leaks.

Frost Damage

Pipes in unheated spaces like lofts, garages and exterior walls are vulnerable to freezing in cold Devon winters. When water freezes inside a pipe it expands, cracking the pipe. The leak often only becomes apparent when the ice thaws.

What Not to Do if You Suspect a Leak

If you think you have a hidden leak, avoid these common mistakes that can make the problem worse or more expensive to fix.

Do not ignore it and hope it stops

Hidden leaks do not fix themselves. The longer you wait, the more damage they cause and the more expensive the repair becomes.

Do not start ripping up floors or walls

Modern leak detection equipment can pinpoint a leak without destructive investigation. A professional with thermal imaging or acoustic detection will find it faster and with far less damage.

Do not use leak-sealing products as a permanent fix

Chemical sealants and leak-stop products are temporary measures at best. They can mask the problem and make it harder for a plumber to find the actual source later.

Do turn off your stopcock if the leak is severe

If water is visibly flowing, turn off your internal stopcock (usually under the kitchen sink) to stop the supply while you arrange a emergency plumber.

Leak Detection Costs in Exmouth

Professional leak detection uses specialist equipment to find the source without ripping up your property. Here is what you can expect to pay in the Exmouth area.

Service	Typical Cost
Leak detection (thermal / acoustic)	£150-£400
Leak repair (accessible pipe)	£100-£300
Leak repair (behind wall / under floor)	£300-£800
Underground supply pipe repair	£500-£1,500+

For a full breakdown of plumber rates, see our plumber costs guide.

Hidden Water Leak FAQs

Think You Have a Leak?

Browse our directory of local Exmouth plumbers who offer leak detection and repair services. Find someone experienced, check their qualifications and get in touch directly for a no-obligation quote.

Find Leak Detection Specialists

Got a visible leak or burst pipe right now? See our emergency plumber guide for immediate help, or check plumber costs to understand typical repair rates.