Services
Leak Testing of Drainage & Sewer Systems according to ÖNORM

The Official Certification for Authorities & Insurance Companies
Whether for the occupancy permit of your new building, as proof of quality after a rehabilitation, or as part of your duty of care as an owner or property management: the official proof of a non-leaking (tight) sewer system is essential to ensure legal compliance.
As one of the few certified leak testing companies in Austria, we carry out the leak testing of your entire drainage and sewer system, including sewers, manholes, and separators, exactly according to the strict requirements of ÖNORM B2503. You receive a complete and recognized test report from us as reliable documentation for authorities or insurance companies.
Should the test reveal a need for rehabilitation, we, as a full-service provider, will immediately prepare a suitable rehabilitation concept for you.
Frequently asked questions about leak testing
Here you will find answers to the most frequently asked questions about leak testing.
A leak test is required whenever you need official proof of the condition of your sewer system. The most common applications are for the final inspection of new buildings (for the use permit), as proof of quality following a renovation or to fulfill your duty of care as an owner or building manager.
We test the tightness of your entire drain and sewer system. This includes underground pipes, channels, shafts and separator systems (e.g. grease or oil separators). The test is carried out in accordance with the strict requirements of ÖNORM B2503 to ensure a complete and reliable result.
After an initial visual inspection and cleaning of the pipe sections to be tested, the system is temporarily sealed at both ends. The section is then filled with either water or air and kept at a defined test pressure for a specified period of time. A measuring device documents exactly whether the pressure remains constant or falls.
Only a certified company such as DerKanal can issue you an audit report that is officially recognized by authorities, insurance companies and in legal matters. Certification is your guarantee of professional implementation in accordance with applicable standards and a result that you can rely on.
If the leak test reveals damage, our service does not end. We will provide you with exact documentation of the vulnerability. As a full-service provider for all sewer technology, we create a professional and transparent renovation concept for you directly on this basis. In this way, you can easily get an analysis and the solution from a single source.
Why You Should Choose DerKanal

Immediate Emergency Assistance
Our emergency service is available for you 24/7. Right over the phone, our professionals check whether an on-site deployment is truly necessary or if we can help you with simple instructions.
Technology advantage
We rely on state-of-the-art high-tech equipment for precise, efficient, and material-friendly cleaning.
Experienced Specialists
Our team combines proven craftsmanship with a deep technological understanding and finds the best solution for every problem.
Certified Expertise
Through certifications and ongoing advanced training, we guarantee you service and solutions according to the latest technical standards.
Transparency
We discuss the solution and the costs with you before we start the work. With us, there are no nasty surprises. Furthermore, we fundamentally do not require cash payment in an emergency.
Prevention Over Expense
With professional maintenance and upkeep concepts, we actively protect your pipe and drainage system and help to reduce costs and effort in the long term.
Support with Claims Processing
Our service doesn't end with the repair. We are happy to support you after the job with the entire process of filing claims with your property management and/or insurance company.
Pioneers in Backflow Prevention
Increasing heavy rainfall events challenge every sewer system. As pioneers, we offer you a certified backflow prevention as a comprehensive concept: It includes the sealing of the entire system as well as regular inspection and maintenance.
Wide Range of Services
From pipe cleaning and Cured-In-Place Pipe (CIPP) sewer rehabilitation to leak detection, pressure testing, CCTV inspection, backflow prevention, new sewer construction, and high-performance vacuuming work: We are your experts for everything related to sewer technology.
Sustainable and Responsible
We consciously commit to environmental protection. Whether through our growing e-fleet, electricity from our own PV system, or modern water recycling wherever possible: We work sustainably and conserve resources.
Our Leak Testing methods in accordance with ÖNORM B2503
Test with water
This is the classic method for leak testing. The line section or shaft to be tested is temporarily sealed at both ends and filled with water. Over a defined period of time, it is then precisely measured whether the water level remains constant. The test is considered passed if the water loss is within the strict tolerance limits of ÖNORM.
Test with air
In this modern process, a slight positive or negative pressure is applied to the sealed line section. Highly sensitive measuring devices monitor whether this test pressure is maintained over the specified time. A drop in pressure would indicate a leak. This process is often faster and requires no water.
At Home in Austria
Our core area for all services, including our 24/7 emergency service, covers Vienna, Lower Austria (Niederösterreich), and Burgenland. Furthermore, for planned deployments and projects, we are also available for you in Upper Austria (Oberösterreich), Styria (Steiermark), Carinthia (Kärnten), and Salzburg.
