Leaks
7 signs of a hidden water leak
Common signs of a hidden water leak include an unexplained rise in your water bill, damp or discoloured patches on walls or ceilings, a musty smell, the sound of running water when taps are off, low water pressure, mould growth, and a meter that keeps ticking over when nothing is running.
A hidden leak can run for weeks or months behind a wall or under a slab before anyone notices. By the time you see it, there can already be damage to timber, plaster and paint. Catching the early signs saves money and hassle, especially in older Western Sydney homes where pipework is often decades old.
Here are the seven signs worth watching for.
- Your water bill jumps for no reason. If your usage looks normal but the bill has climbed, water is escaping somewhere you cannot see. This is often the very first clue.
- Damp or discoloured patches appear. Yellow or brown stains on walls and ceilings, bubbling paint, or a soft spot in the plaster usually mean water is getting in behind the surface.
- A musty or damp smell hangs around. A constant earthy smell in a bathroom, laundry or hallway often points to water sitting where it should not be, feeding mould and mildew.
- You hear running water when everything is off. A faint hiss or trickle in the walls or floor when no taps are on is a strong sign of a leak on a pressurised line.
- Water pressure drops. If your shower or taps have lost pressure, water may be leaking out of the line before it reaches the outlet.
- Mould or mould stains keep coming back. Mould that returns soon after you clean it, especially in a corner or low on a wall, is often fed by a hidden leak rather than just steam.
- The water meter keeps moving. Turn off every tap and appliance, then watch the meter. If the dial or numbers keep ticking over, water is flowing somewhere in your system.
A simple test you can do yourself
The meter test is the easiest check. Make sure no taps, toilets or appliances are running, note the meter reading, then leave it for an hour or two without using any water. If the reading has changed, you almost certainly have a leak. This works well overnight too, when the house is quiet.
Why older homes are more at risk
Many homes across Berala, Auburn, Lidcombe and the inner west still have original galvanised steel pipes that rust from the inside out, along with ageing joints and fittings. These fail gradually, which is exactly why leaks stay hidden for so long. Slab leaks under concrete floors are also common and very hard to spot without proper equipment.
What to do next
If you tick even one or two of these signs, it is worth acting sooner rather than later. Terry uses leak detection equipment to pinpoint a hidden leak without tearing up walls or floors guessing where it is. Since 1986 he has traced and fixed leaks right across Western Sydney and the inner west, licence L10959. A precise find means a smaller, cheaper repair.
If you suspect a leak, turn off any obvious source, keep an eye on that meter, and give Terry a call on 0415 274 542 for a proper look. Finding it early is always the cheaper option.
Frequently asked questions
- How can I tell if I have a hidden water leak?
- Watch for a rising water bill, damp patches or stains on walls and ceilings, a musty smell, the sound of running water when taps are off, dropping pressure, recurring mould, and a water meter that keeps moving when nothing is running.
- How do I use the water meter to check for a leak?
- Turn off every tap, toilet and appliance, note the meter reading, then leave it for an hour or two without using water. If the reading changes, you have a leak somewhere in your system.
- Can a hidden leak cause serious damage?
- Yes. Left alone, a hidden leak can rot timber, ruin plaster, feed mould and even affect footings. That is why catching the early signs and fixing the leak quickly is so important.
- Why are older Western Sydney homes more prone to hidden leaks?
- Many older homes still have original galvanised steel pipes that rust from the inside, plus ageing joints and fittings that fail slowly. This makes leaks develop quietly over time and stay hidden for longer.
- Do I need to break open walls to find a leak?
- No. Terry uses leak detection equipment to pinpoint the leak first, so any access is targeted rather than guesswork. That keeps the repair smaller and the cost down.
- How much does leak detection cost?
- It depends on the size of the property and how tricky the leak is to trace, but pinpointing a leak is usually far cheaper than the damage it causes if ignored. Terry gives a fixed quote before any work. Call 0415 274 542.
Related services
Need a hand from a real plumber?
Terry's been sorting plumbing across Berala and Western Sydney since 1986. Call 0415 274 542 for a straight answer and a fixed price.
NSW Licence L10959 · 40+ years experience