Hidden Water Leak? Start Here

Not every water leak is immediately visible. A pipe can leak behind a wall, beneath a slab or underground outside the home without producing an obvious puddle.

You may first notice something indirect, such as a water bill that is higher than expected or a water meter that continues recording usage when all taps and fixtures are turned off.

Other warning signs can include persistent dampness, unexplained moisture, musty smells or the sound of running water when no water should be flowing.

The sooner a concealed leak is investigated, the sooner you can understand what is happening and determine whether repair work is required.



If you are looking for water leak detection in Perth's southern suburbs, Tactical Detection can assess the symptoms and determine the most appropriate diagnostic approach for your property.

Signs You May Have a Concealed Water Leak

A hidden leak can be difficult to identify without professional testing, but several signs may indicate that water is escaping somewhere within your plumbing system.

Your Water Meter Keeps Moving

Turn off all taps and water-using appliances and check your water meter. If the meter continues to register movement despite no intentional water use, there may be an active leak somewhere on the property.

Your Water Usage Has Increased

An unexplained increase in water consumption can be another warning sign, particularly when your household's normal usage has not changed.

Damp or Musty Areas

Persistent dampness, unexplained wet areas or musty odours may indicate water accumulating behind a surface or beneath the property.

Bubbling Paint or Swollen Skirting

Moisture inside walls can affect painted surfaces, plaster and skirting boards. Bubbling paint, discolouration or swollen materials should not be ignored.

Unusual Water Sounds

Hearing water running, hissing or other unusual sounds when taps and fixtures are off may indicate water escaping from concealed pipework.

Wet Areas That Do Not Dry

A patch of flooring, wall or ground that remains consistently wet without an obvious source can warrant further investigation.

These signs do not necessarily confirm a concealed leak. Professional testing can help determine whether there is an active leak and, if so, where it is occurring.

Non-Invasive Detection Technology

Different leaks present different diagnostic challenges.

Tactical Detection uses a range of detection technologies, with the appropriate method selected according to the conditions at the property.

Thermal Imaging

Thermal imaging can identify temperature differences across surfaces. Where conditions are suitable, these variations can help indicate areas affected by moisture or changes associated with concealed water movement.

Tracer Gas

Tracer gas can assist with locating difficult-to-detect leaks in suitable plumbing systems. A calibrated gas is introduced into the relevant section of the system, allowing specialised detection equipment to identify where the gas is escaping.

Acoustic Detection

Water escaping from pressurised pipework can create sound that travels through surrounding materials. Acoustic sensors can help detect and assess these sounds, assisting with pinpointing leaks that are not visible.

Moisture Mapping

Moisture mapping helps identify and assess areas of elevated moisture across relevant surfaces. This can help establish the extent and location of moisture and support the wider diagnostic process.

No single technology is suitable for every leak. Our technicians select the diagnostic method according to the property's construction, pipework, accessibility and suspected leak characteristics.

Leaks in Walls, Slabs and Underground Lines

Concealed water leaks can occur in many parts of a residential property, including:

• Wall cavities
• Ceilings
• Beneath concrete slabs
• Concealed internal pipework
• Underground water supply lines
• Garden and external water lines
• Connections between plumbing components

Finding a leak in these locations can be challenging because the source of visible moisture is not necessarily the same as the location of the leak itself.

For example, water escaping from concealed pipework can travel through surrounding materials before becoming visible elsewhere.

Professional detection helps narrow down the likely source before more invasive access is considered. This can reduce unnecessary exploratory damage and, where possible, avoid digging up large areas simply to search for a leak.

What Happens After the Leak Is Found?

Locating the leak gives you a much clearer starting point for deciding what happens next.

Once the suspected source has been identified, Tactical Detection can explain the location and findings. Where required, findings can also be documented to assist with subsequent repair work or reporting requirements.

Depending on the situation, the next steps may include:

1. Confirming the leak location — We explain where the suspected leak has been identified.
2. Determining access requirements — Some concealed leaks require a surface to be opened before the pipe can be repaired.
3. Discussing targeted repairs — Where suitable and within scope, minor repairs may be completed as part of the service.
4. Planning additional works — More complex repairs may require further access, concrete cutting or additional trades.
5. Providing findings for next steps — Diagnostic information can help guide repair decisions or support reporting and insurance requirements where applicable.

Detection and repair are related but separate stages. Finding the source first helps establish what access and repair work is actually necessary.

Water Leak Detection Across Perth's Southern Suburbs

Tactical Detection operates from Baldivis, providing mobile water leak detection services across Perth's southern suburbs and the Peel Region.

Our service area includes the verified coastal corridor around:

• Baldivis
• Secret Harbour
• Rockingham
• Surrounding Southern Perth areas
• Mandurah
• Surrounding Peel Region areas

If you are unsure whether your property is within our current service area, contact us with your suburb before booking.

You can also view our current coverage through our Southern Perth and Peel service areas.

Prepare for Your Water Leak Detection Appointment

A few details can help us understand the problem before attending your property.

When you call, be ready to provide:

• Your suburb and property address
• What symptoms you have noticed
• Whether the water meter moves when all fixtures are off
• Any recent changes in your water bill or usage
• Where dampness, staining or other signs have appeared
• Any unusual water sounds you have noticed
• Details of previous leak investigations or repair attempts
• Information about access to the affected areas
• Whether you need findings or documentation for an insurance claim

You do not need to determine the exact source yourself. The more useful information you can provide about the symptoms and when they occur, however, the easier it is to understand what may need to be investigated.