Why a hidden leak goes undetected for so long
A leak on exposed pipework shows itself almost immediately: a puddle, a damp stain, an obvious drip. The real problem starts when the leak is on a section buried in a wall, under the floor, or in an awkward spot like a light well. In those cases the water can seep for weeks or even months with no visible symptom at all, until the damage is already considerable — either structural damp or a water bill that climbs with no apparent explanation.
The meter test: the most reliable way to confirm it
Before assuming a hidden leak, there is a simple and fairly conclusive check you can carry out with no tools.
How to run the test
Close every tap in the property, make sure no appliance that uses water is running — dishwasher or washing machine — and note the exact meter reading. Wait two hours without using any water point and look at the meter again. If the figure has changed, water is being consumed somewhere in the installation even though you are not knowingly using any, which points directly to a leak.
A quicker variant using the stopcock
If you want a faster check, close the main stopcock overnight and note the meter before going to bed and again on waking. If there has been movement over those hours with nobody using water, the leak is confirmed.
Indirect signs worth watching
- The water bill rises noticeably without any change in how the property is used.
- You hear water running inside a wall or under the floor when the house is silent and no tap is open.
- An area of wall or floor feels unusually cold to the touch, or a damp patch grows slowly with no clear source.
- The ground near an external wall or a yard looks abnormally green or wet, even without rain.
- Water pressure at one tap drops gradually with nothing having been changed in the installation.
Why it is so common on this coast
The very hard water here does not only affect drains: it also accelerates internal wear in older metal pipework, encouraging micro-fractures that turn into leaks over time. Add to that the fact that many Vega Baja properties sit closed for long stretches, with nobody to notice a gradual change in pressure or on the bill until the next stay — by which point the leak has been running for a while.
What you can check yourself before calling a professional
Always start with the accessible points before suspecting a buried section. Look under the kitchen sink and the basin, check the flexible connections on the toilet cistern, and inspect the area around the main meter, which sometimes conceals the most obvious and easily fixed leak with no building work at all. If after checking these the meter test still shows consumption, the leak is probably in a buried or embedded section, and improvising is no longer wise.
How a professional locates a hidden leak without opening up the whole property
An experienced plumber does not start chasing walls at random. Acoustic detection equipment amplifies the characteristic sound of water escaping under pressure inside a pipe, and thermal cameras pick up temperature differences on the wall surface where water is seeping. These techniques narrow the area precisely before any chasing begins, keeping damage to the finishes to a minimum. In most cases this combination means opening a single very specific point of wall or floor rather than tearing up a whole room searching blind.
| Sign | What it usually means |
|---|---|
| Meter moves with everything closed | An active leak somewhere in the installation |
| Bill rises with no change in use | A gradual leak, probably in a buried section |
| Sound of water in a wall or floor | A leak close to the surface, easy to locate by sound |
| A damp patch that keeps growing | A leak that has been running for some time |
Closed properties: where it gets worst
The most delicate case is a property that sits closed for months, typical of owners living outside Spain or of occasional second homes. There is nobody to hear the water or check the bill regularly, so a small leak can develop across an entire season without anyone noticing until the next visit, by which time the damage already affects floors, walls or even furniture. For these cases a quick check before each arrival is worth establishing, starting with the meter test on the very day the property is opened, before assuming everything is in order — a few minutes of checking can save weeks of a problem that only worsens with time and with the property closed again.
If the meter test confirms unexplained consumption, Manitas covers the whole Vega Baja and quotes free of charge to locate the leak before it grows.
