7 Warning Signs of an Underground Water Leak
The first signs of an underground leak
An underground water leak can develop quietly beneath a garden, path or driveway. The first clue may be an unexpected water bill rather than visible flooding. At Leakage Solutions, we help property owners across Plymouth, South Devon and East Cornwall investigate suspected supply pipe leaks and decide what action is appropriate. Recognising the warning signs early can reduce wasted water and the risk of damage.
Seven warning signs to watch for
- A rising water bill: Compare recent bills and meter readings with your usual consumption. Seasonal changes and extra occupants can also increase usage, so look for a pattern rather than relying on one bill.
- Persistently wet ground: A soggy patch that remains after surrounding soil dries may indicate escaping water. Poor drainage can look similar.
- Unusually green grass: A strip of vigorous growth may follow a leaking supply pipe, although watering patterns and soil conditions also matter.
- Reduced water pressure: A leak is one possible cause, but a local supply interruption, blocked fitting or plumbing fault can have the same effect.
- Water sounds when everything is off: Hissing or trickling near the incoming pipe deserves investigation.
- Cracking or sinking paving: Saturated ground can undermine surfaces, but settlement has other causes too.
- Damp near the point where the water supply enters the building: Check for other sources of moisture before assuming an underground leak.
How to check whether water is being lost
If you have a water meter, switch off taps and water-using appliances and make sure no toilet cistern is refilling. Record the reading, leave everything unused for around 20 to 30 minutes and check again. A changed reading suggests water is passing through the meter, but it does not establish whether the leak is inside or outside.
If safe and accessible, a professional can help isolate sections of the supply to narrow down the cause. Do not open buried pipes or dig around unknown services.
Why professional detection matters
The visible wet patch is not necessarily directly above the damaged pipe: water can travel through soil and along hard surfaces. A specialist assesses the symptoms, pipe route and site conditions before recommending targeted investigation. This can avoid unnecessary excavation and help determine whether a localised repair or full pipe replacement makes more sense.
Frequently asked questions
Can I identify the leak myself?
You can spot warning signs and carry out a basic meter check, but locating the precise failure often needs professional investigation.
Does low pressure prove a leak?
No. Several supply and plumbing issues can cause reduced pressure.
Will the whole garden need digging up?
Not necessarily. The right approach depends on the location and condition of the pipe.
Don’t just take our word for it
“Excellent service. From their initial visit to look at my water leak to doing the work they were reliable and efficient. Martins knowledge of the issue was reassuring and the work was carried out with as little disruption as possible. I would have no hesitation in recommending them.”
Jane French
Ask Leakage Solutions for help
If you suspect an underground water leak in Plymouth, South Devon or East Cornwall, call us on 07714 593 690.
We can discuss the symptoms and arrange an initial visit and free, no-obligation quotation where appropriate. Visit leakagesolutions-devon.co.uk to get in touch.