Don’t rush into replacing your septic tank.
From collapsed baffles to tree root damage, we identify the problem, ensure NIEA compliance, and check if your repair costs are covered by your buildings insurance.

We identify faults in any septic tank system. You get the right fix for the specific problem.
We focus on cost-effective repairs rather than expensive replacements. You save the cost of a new installation.
We manage NIEA compliance requirements. You meet environmental standards without administrative burden.
We provide support to recover repair costs through insurance. Your claim is backed by technical evidence.
We deliver fast service to homes and businesses across Northern Ireland. You restore sanitation quickly.
NI Leak Detection provides septic tank repair services for domestic and commercial systems. We inspect the system, identify faults, and carry out repairs to restore operation. We help prevent further failure, reduce disruption, and support continued use of the system.
If your garden is wet or you smell sewage, you probably fear the worst. You worry about the cost of a brand new septic tank. You worry about the disruption.
Most companies want to sell you a full installation. We are different.
We are civil engineering specialists. Our first priority is to save your existing septic tank. Often, the system has failed because of a specific, repairable fault. A pipe might be sheared. A baffle might be broken. Tree roots might be blocking the inlet.
These issues are costly if ignored, but they do not always require a total replacement. We find the root cause, propose a targeted fix, and help you avoid unnecessary spending.
Many homeowners call for tank emptying or desludging hoping it will solve the problem. If the tank fills up again within days, emptying it was never the solution.
Groundwater may be leaking into the tank through a crack or damaged seal.
The soakaway or drainage field may be blocked, meaning the water has nowhere to go.
We don't just suck out the waste. We inspect the mechanism.
We look for specific failures inside the wastewater system.
Ground movement or vehicle traffic can cause settlement. This puts stress on the tank walls. If we catch it early, we can often stabilize the structure or repair cracks to stop the leak.
Old brick tanks and modern fibreglass units both rely on internal parts like dip pipes and T-pieces. These separate the solid waste from the water. If these fall off, sludge escapes into the drainage system and causes a clog. We can replace these parts without removing the tank.
Tree roots are aggressive. They seek out moisture in the drain lines and crack them. This causes a blockage and allows pollution to escape. We use robotic cutters to remove the roots and structural liners to seal the pipe from the inside.
If the soil around your septic drain field is clogged with solids, the water surfaces in your garden. We analyse the soil and can often rejuvenate the drainage area using high-pressure systems or bacteria treatments, avoiding a full dig-out.
This is the most important check we do.
Many septic tank failures in Northern Ireland are classified as "accidental damage." This is distinct from "wear and tear."
If we find evidence of accidental damage, we can manage the technical side of your insurance claim. We compile the survey evidence, present the engineering facts to your insurer, and fight for your coverage. This can turn a distress purchase into a manageable excess payment.
In Northern Ireland, environmental regulations are strict. You cannot discharge untreated sewage into a watercourse or storm drain.
The Environment Agency (NIEA) monitors pollution risks. If your system fails a standard inspection, or if you plan to sell your property, your system must be compliant.
We ensure every repair service meets the current "Consent to Discharge" standards. If your older septic tank cannot be saved legally, we will be honest. We will then design a sewage treatment plant solution that guarantees compliance and protects the local environment.
We follow a structured engineering approach to resolve the issue safely.

We ask about the age of the property, previous maintenance, and symptoms (smells, overflow, wet patches).
We may arrange desludging to see the tank structure clearly.
We run cameras down the sanitary sewer lines to check for roots, cracks, or collapsed sections.
We determine if the septic tank needs repair, or if the soakaway is the issue.
We propose the most reliable and environmentally friendly repair.
Still Have Questions?
Call Our Expert Team For Help
NI Leak Detection provides water leak detection services for homes and businesses across Northern Ireland. We use thermal imaging, acoustic sensors, and moisture mapping to find and repair leaks. We help homeowners save money and protect property by preventing water damage.
Whether you’re in a city centre apartment or a rural farmhouse basement, our technicians are trained to analyse the unique challenges of Northern Ireland homes.
When I discovered water pooling in my kitchen late in the evening. I called the Emergency Leak Detection Service in Northern Ireland, and they responded quickly. The technician arrived within an hour, found the leak, and explained the problem clearly. Their efficiency saved me from further damage, and I’d highly recommend them to anyone needing urgent help.
Phil T. - BelfastAs a landlord with multiple properties in Ards, their 24/7 service has been a lifesaver, especially during weekend emergencies. Their technicians are always professional, thorough, and explain everything clearly. The detailed reports they provide are excellent for my records and insurance purposes.
Margaret W. - Ards ...they found our hidden leak without any additional damage to our home. Their professional approach and clear communication made the whole process stress-free. Highly recommended!
Jenny - BangorDo not rush into a costly replacement. Speak to a Civil Engineering Consultant who understands the ground, the regulations, and your insurance policy.
Call NI Leak Detection: 028 9507 1126 Expert Septic Tank Repair & Diagnostics
Specialist detection services for every situation
Locating leaks or failures in buried drainage and pipework connected to septic systems.
View DetailsTesting approaches that help identify issues without unnecessary ground disturbance.
View DetailsLeak investigation for commercial or mixed-use sites with private drainage systems.
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