Fastest, most accurate leak detection

Tank and line testing

Leighton O’Brien offers the most advanced tank and line testing technology available. There is no leak scenario that our test method cannot detect. Continually developing our leak detection technology means Leighton O’Brien has the world’s only

US EPA-certified precision dry line test in just 3 minutes, the fastest and most accurate wet line test in 17.5 minutes, and a precision tank test capable of testing in as little as one hour with minimal disruption to sales.

Why test?

Historically tank and line testing has been used to meet regulatory requirements or because of a problem on site. This approach is changing. The vast majority of Leighton O’Brien integrity testing is now conducted by customers as a preventative measure to stop problems before they happen.

Customer Profile

How it works

The Leighton O’Brien advantage

  • Our proprietary tank test technology can detect pressure changes of 1 Pascal, enabling detection of the smallest liquid movement
  • We can detect a level change of 1/1000mm to identify any loss of integrity in your system
  • We can test your entire system in any configuration on a single technology platform
  • We can test tanks at any fill level, including empty tanks, with the same high degree of accuracy
  • Testing just tanks is not enough – 90% of new sites we test have a leak in the product lines
  • Our test equipment is portable so we can test in virtually any location worldwide
  • We DO NOT rely on site technicians to make the final call on results. Our engineers can identify leak detection patterns in the data to address customer problems that go beyond a simple pass or fail

Why mass and not vacuum based testing?

  • Although Leighton O’Brien is certified to conduct a test under vacuum, we choose to conduct 99% of our work using a mass-based underfill test – simply because this method avoids many of the issues that plague vacuum tests and allows clear identification of all leaks for quick repair
  • With vacuum testing you cannot ‘hear’ a leak no matter how sensitive your equipment if the leak has been sealed by the vacuum force. Eighty-five per cent of ullage leaks will occur in manways, and by exerting a vacuum force of 5PSI (as is standard in some vacuum acoustic tests), a force equivalent to placing a 6.4 tonne weight on the manway is exerted during the test. This force effectively seals any leaks causing a FALSE pass only return when the vacuum is released.
  • Traditionally vacuum tests don’t diagnose the issue; rather you just receive a pass or fail result. With Leighton O’Brien we can advise if liquid is entering or leaving the tank and at what rate, allowing you to accurately assess the next steps.

Why test if you experience phase separation, contamination or free water?

 Symptoms such as phase separation, contamination, or free water in a tank are often a result of a simple integrity issue. There is no value in treating the symptoms without addressing the root cause. A Leighton O’Brien integrity test will quickly, accurately and quantifiably identify the source any ingress to a fuel system.

Our recommended practice in these cases is threefold:






Leighton O’Brien delivers on every level. They beat the competition on accuracy, they deliver support and innovation that matches our own and they help us make a difference in our sector.

Keith Bevan, Group Business Development Manager
Suresite Group, UK

Adding fuel polishing and restoration to our product line through Leighton O’Brien is another valued service to address fuel quality issues. We are extremely pleased with the design and efficiency of the units and provides a professional platform that fits our model well.

Chris Biellier, Vice President
Seneca Companies – Environmental & Waste Solutions Divisions, USA

Leighton O’Brien is integral to our operation. We trust them to provide tank cleaning, testing and monitoring for our petrol stations around Australia. They are a smart engineering and technology company who I highly recommend.

Terry Lunney, Manager – Assets, Facilities, Construction
7-Eleven Stores Pty. Ltd.

Enquire about our service

Feel free to contact us with any enquiries and we’ll get back to you within 24 hours. For an office or distributor, please locate them via Find Us on our Contact page.

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