Water & Pipe
Pool & External
Pressure testing checks whether a pipe system can hold pressure without leaking, including water mains, sewage lines, irrigation systems, fire sprinklers, and compressed air lines. ALD uses safe inert gases, nitrogen or helium, to identify pressure drops caused by leaks, cracks, ruptures, or joint failures. We never use natural gas, compressed air, or oxygen, as these create serious safety risks.
Using safe inert gases only: nitrogen or helium.
Pressure testing is a method of assessing the structural integrity and leak-resistance of a closed pipe system by pressurising it with an inert gas to a specified level and measuring whether pressure is maintained over a defined test period. Any drop in pressure indicates a leak, rupture, joint failure, or integrity issue.
Pressure testing is used for water supply lines, sewerage systems, irrigation systems, fire sprinkler systems, HVAC ductwork, and any other system that must maintain pressure integrity. It's performed to diagnose failures, verify repairs, validate new installations, or assess whether a system is fit for continued use.
A pipe system is suspected to be leaking but location is unclear
A section of pipe was repaired and you need to verify the repair is holding pressure
A new pipe system was installed and must be tested for integrity before use
You're selling a property and need to document system integrity for the new owner
A pipe system is ageing and you want to know if it's still safe to use
You suspect corrosion or joint deterioration in an underground or hidden pipe system
Building or renovation work involves pipe systems that need integrity verification before handover
Pressure testing is the only way to know if a closed system truly holds integrity. One test is worth weeks of assumptions.
$495
For a standard pressure test.
That depends on the system type and its normal operating pressure. Water supply lines typically test at 1.5× working pressure (if that's 600kPa, test at 900kPa). Sewerage systems test at lower pressures (50–100kPa). Your system documentation or a building authority specification will define the test pressure. We'll confirm the right pressure before starting.
Nitrogen and helium are inert — they don't react, combust, or pose explosion risk if a rupture occurs. Compressed air contains oxygen, which creates fire and explosion risk under pressure. Water pressure testing is valid for some systems but doesn't work for all pipe types and applications. We use nitrogen or helium because it's the safest, most reliable method.
A failed test tells you the system has a leak or integrity issue. We'll identify where the leak is so you know what to repair. Some leaks are at joints (fixable by tightening or resealing), some are in the pipe itself (requiring section replacement). Your plumber or contractor will use our findings to plan the repair.
No. Testing requires the system to be completely isolated from live supplies. If it's not isolated, you're testing the entire building's system, not just the section of interest. Proper isolation ensures a valid test result.
For a small residential system, 1–2 hours. For a larger or more complex system, 3–4 hours including inspection, pressurisation, test duration, and reporting. We'll estimate the time during your booking call.
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View ServicePressure testing proves whether it does. Book a test and know for certain.
