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A damp patch that will not dry, a boiler that keeps losing pressure, a faint hiss behind a quiet wall. Hidden leaks announce themselves in whispers — the clock below turns suspicion into an answer.
The one-line answer: turn everything off, close the main stopcock and watch — if the damp patch stops growing or the hiss goes quiet, the leak is on your own pipework. If water is near electrics or a ceiling is bulging, shut the stopcock and ring 020 4577 2888 now.
Hidden leaks rarely shout, so start by listing what the house has been muttering. A damp patch that grows or refuses to dry. A stain spreading across a ceiling. A musty smell in one room. Flooring that lifts, darkens or feels spongy. The hiss of running water when everything is off and the house is silent — late evening is the best time to listen. And the quietest witness of all: a boiler pressure gauge that keeps sliding down, which means the heating system is losing water somewhere it should not.
One thing that will not warn you here: the bill. Most Scottish homes are unmetered, with water charged alongside council tax, so a leak never shows up as a bigger number. If your home does have a water meter, an unexplained jump in usage is a clue worth adding to the list.
Signs listed. Now stop guessing and run the one test that gives a straight answer.
Turn off every tap, pause the washing machine and dishwasher, and make sure nothing in the house is drawing water. Then close the main stopcock and watch for half an hour or more. If the damp patch stops growing, the drip slows, or the hiss goes quiet, the leak is on your own pipework, downstream of the stopcock — real, but findable. If your home has a water meter, there is a sharper version: read the meter, use no water for 30 to 60 minutes, and read it again; any movement means water is escaping between the meter and your taps.
If water keeps arriving with the stopcock firmly shut — rising through a floor, pooling outside — the fault may sit on the supply side. Leaks on the public side of the boundary are Scottish Water's territory, and a plumber can help you work out which side of the line you are on before you pay for anything.
Now grade what you found. Ring straight away if water is anywhere near sockets, light fittings or the consumer unit, if a ceiling is sagging or bulging, or if a patch is spreading while you watch — with the stopcock shut and power off to the affected circuits if you can reach the switches safely. A slow stain that has sat unchanged for months, or a heating system that drops pressure over weeks rather than hours, is a daylight appointment at daylight rates. Either way, describe the pattern when you phone: where the signs are, what the stopcock test showed, how fast the boiler loses pressure. That is the map the plumber follows to the leak.
Photograph the damp before it dries and keep the pictures with any repair invoice — escape-of-water insurance claims want both, and gradual leaks are treated differently from sudden ones, so report promptly. In the older stone houses around the town centre, long pipe runs under timber floors mean a leak can travel before it surfaces; note where the signs appeared even after the repair, in case the story has a second chapter.
A damp patch that grows or will not dry, a stain spreading on a ceiling, a musty smell in one room, flooring that lifts or feels spongy, the faint hiss of running water when the house is silent, and a boiler pressure gauge that keeps sliding down. None of these proves a leak on its own — together, and worsening, they are worth taking seriously.
Often, yes. A sealed heating system that needs topping up every week is losing water somewhere — a weeping radiator valve, a joint under a floor, or an internal boiler fault. Topping up hides the symptom without fixing the cause, so tell the plumber about the pattern rather than quietly refilling; how fast the needle falls is genuinely useful information.
Turn off every tap and water-using appliance, then close the main stopcock and watch for half an hour or more. If the damp patch stops growing or the hiss goes quiet, the leak is on your own pipework, downstream of the stopcock. If your home has a water meter, there is a sharper version: read the meter, use no water for 30 to 60 minutes, and read it again — any movement means water is escaping somewhere.
Usually not in Scotland — most homes here are unmetered, with water charges collected alongside council tax, so a hidden leak never shows up as a bigger bill. If your home does have a water meter, an unexplained jump in usage is a genuine clue worth chasing. For everyone else, the physical signs and the stopcock test are the honest detection tools.
When water is anywhere near sockets, light fittings or the consumer unit; when a ceiling is sagging or bulging; or when a patch is visibly spreading while you watch. In those cases shut the stopcock, cut power to the affected circuits if you can do it safely, and phone straight away. A slow stain that has sat unchanged for months can wait for a daylight appointment.
The main page — the whole first hour on one clock, plus areas covered.
Go to home →Stopcock in the first minute — the timed plan for water everywhere.
Start the clock →Pressure, lockouts, frozen condensate pipes — and gas safety first.
Start the clock →Pressure, timer, tripped switch — the safe checks before you call.
Start the clock →Gentle heat from the tap end — and the lagging that stops the next one.
Start the clock →One plughole or the whole house — how to tell, and what to try.
Start the clock →Honest ballparks and the questions to ask before work starts.
Read the guide →Describe the signs and what the stopcock test showed, and be connected with a local plumber covering Dunfermline and west Fife — any hour.
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