Water Leak Detection in Perth

Not every leak announces itself with a puddle. Some of the most damaging leaks are the ones you can't see, hidden under a concrete slab, buried in a garden, or running quietly inside a wall. Left undetected, they waste hundreds of litres of scheme water, drive up your Water Corporation bill, and rot timber, damage foundations and breed mould long before you notice a thing.

Our licensed Canning Vale plumbers use professional leak detection equipment to find hidden leaks fast and accurately, without tearing your home apart. Here's how it works.

Signs you might have a hidden leak

Hidden leaks often show up as indirect clues rather than obvious water. Watch for:

• A water bill that's crept up with no change in your usage
• The sound of running or trickling water when every tap is off
• Damp patches, bubbling paint or stained plaster on walls or ceilings
• A persistent musty or mouldy smell
• Warm spots on the floor, which can signal a hot water slab leak
• Reduced water pressure at the taps
• Unexplained cracks, or a lush green patch in an otherwise dry lawn
• Your water meter ticking over when nothing's running

A simple check: turn off every tap and appliance, then look at your water meter. If the dial is still moving, water is escaping somewhere. Our guide to the signs of a hidden water leak walks through this in more detail.

How we detect leaks

The days of guessing and smashing through walls are long gone. We use non-invasive technology to pinpoint a leak's exact location, so any repair is small and targeted.

Acoustic detection

Water escaping from a pressurised pipe makes a distinct sound, even underground or beneath a slab. Using sensitive acoustic listening equipment and ground microphones, we can hear that sound and trace it to the precise point of the leak, often to within centimetres. It's remarkably accurate and completely non-destructive.

Thermal imaging

A thermal camera reveals temperature differences behind walls and under floors. A hot water leak shows up as a warm trail, while a cold water leak creates a cooler patch, letting us map the leak's path without opening anything up. It's especially useful for leaks inside walls and ceilings.

Pressure testing and gas tracing

For trickier cases, we can isolate and pressure-test individual sections of pipework to confirm exactly which line is leaking, or introduce a safe tracer gas that escapes through the leak point where it can be detected at the surface. These methods narrow down elusive leaks that other techniques miss.

Common leaks we find

Slab leaks

Many Perth homes are built on a concrete slab with water pipes running underneath. When one of these pipes fails, water can pool under the slab, undermine foundations and force its way up through the floor. Slab leaks are notoriously hard to find without proper equipment, which is exactly where acoustic and thermal detection earn their keep.

Underground and service leaks

Leaks on the buried supply line between your meter and the house, or on garden and reticulation lines, can run for months unseen. We locate them precisely so we can dig one small, targeted hole rather than trenching the whole yard.

Pool and spa leaks

Losing more water from your pool than evaporation explains? A pool or spa leak in the shell, plumbing or fittings wastes water and chemicals continuously. We can help track down where it's escaping.

Wall and ceiling leaks

A leak inside a wall cavity or above a ceiling can cause serious structural and mould damage before it becomes visible. Thermal and acoustic tools let us find it early, before it does real harm.

Why accurate detection saves you money

Precise detection isn't just neater, it's cheaper. Pinpointing a leak means the repair is small and focused instead of a costly demolition-and-guess exercise. You save on repair costs, avoid unnecessary damage to your home, and stop the ongoing waste of water you're paying for. Every day a leak runs, it costs you, so fast, accurate detection pays for itself.

Once we've found the leak, we can carry out the repair too, whether that's fixing a burst or leaking pipe, resealing a joint, or replacing a failed section. And if the leak is causing active flooding, our emergency plumbers are available around the clock.

Catching leaks early protects your home

The real damage from a hidden leak is rarely the water bill, though that stings. It's the slow, unseen harm to the fabric of your home, swollen skirting boards, lifting tiles, blistered paint, and the black mould that thrives in a constantly damp cavity and can affect your family's health. By the time a hidden leak becomes visible, it has often been running for weeks or months, so the earlier it's found, the less it costs to put right.

That's why we'd always rather you called us at the first sign of something odd, an unexplained damp patch, a musty smell, or a water bill that doesn't add up, than wait until the ceiling is sagging. Detection is quick and non-destructive, and knowing for certain whether you have a leak, and exactly where it is, takes the worry out of the situation either way.

In Western Australia, leak repairs must be carried out by a licensed plumber, so you can be confident the fix is done correctly and to code. If your bill has jumped, you can hear water running, or you suspect something's leaking out of sight, call our licensed Canning Vale plumbers or request a quote today. We'll find it fast, with no unnecessary mess and honest, upfront pricing.

Frequently asked questions

How can I tell if I have a hidden water leak?

Watch for an unexplained jump in your water bill, the sound of running water with all taps off, damp patches or bubbling paint, a musty smell, or warm spots on the floor. A quick test: turn off everything and check your water meter. If it's still ticking over, water is escaping somewhere.

How do plumbers find leaks without breaking walls?

We use non-invasive tools. Acoustic listening equipment detects the sound of water escaping a pressurised pipe, even underground, while thermal imaging reveals warm or cool patches behind walls and floors. Pressure testing and tracer gas help with tricky cases. Together they pinpoint the leak so any repair is small and targeted.

What is a slab leak?

A slab leak is a leak in a water pipe running beneath your home's concrete slab. Because it's hidden under the floor, it can undermine foundations and cause damage before you notice, often showing as a warm floor patch or unexplained damp. Acoustic and thermal detection are the best ways to locate one accurately.

Can you find a pool leak?

Yes. If your pool is losing more water than evaporation would explain, it may be leaking through the shell, plumbing or fittings, wasting water and chemicals continuously. We can help track down where the water is escaping so it can be repaired, saving you money and constant topping up.