Hidden leaks are one of the most common — and most costly — issues homeowners face, especially within older heating systems across Belfast and surrounding areas. When water escapes beneath floors or behind walls, the damage can build slowly and silently, leading to higher bills, boiler pressure loss, and long-term structural problems.
At B Keenan Plumbing & Heating, we were recently called to a property in Belfast, Northern Ireland, where the homeowner had been experiencing repeated drops in boiler pressure with no visible sign of water. This is exactly the kind of situation where our specialist leak detection service is essential.
The First Signs of Trouble
The customer reported that their heating system was losing pressure every day. Even after topping up the boiler, the pressure would fall again within hours.
Because there was no obvious sign of damp or flooding in the home, the leak was almost certainly hidden within the heating pipework.
Hidden leaks like this are extremely common in Northern Ireland homes, particularly where pipework runs:
- Under wooden floors
- Through concrete screeds
- Behind plasterboard or stud walls
- Below insulation or carpets
Without the right tools, finding the exact location is nearly impossible.


How We Located the Leak
Our engineers arrived with the latest non-invasive leak detection equipment. Instead of lifting floors unnecessarily, we used:
- Thermal imaging cameras to track heat loss along the pipe runs
- Acoustic listening devices to pick up escaping water vibrations
- Moisture readings to identify elevated levels beneath floor coverings
Within a short time, our diagnostics pinpointed a specific area beneath the floor where the heating pipe was losing heat abnormally.
When we created a small inspection opening, the cause became clear:
A failing pipe fitting was slowly dripping under the floor — just enough to drop system pressure but not enough to become visible above the surface.
Repairing the Issue
After isolating the heating circuit, we replaced the faulty component and secured all adjoining pipework.
The system was then:
- Refilled
- Re-pressurised
- Fully tested
- Put back into operation
The boiler pressure stabilised immediately, confirming the leak had been completely resolved.
Why Professional Leak Detection Saves Time and Money
By using modern diagnostic tools, we were able to:
✔ Avoid lifting large sections of flooring
✔ Locate the exact source of the leak quickly
✔ Prevent further structural damage
✔ Restore the heating system in a single visit
For homeowners, this means less disruption — and far lower repair costs than outdated “search and hope” methods.
Professional Leak Detection in Belfast, Bangor & Surrounding Areas
If your boiler is losing pressure or you suspect a hidden leak, don’t wait until the damage becomes visible. Our advanced diagnostic equipment allows us to find and repair issues fast, anywhere in Greater Belfast and County Down.
Learn more about our leak detection service here:
https://bkeenanplumbingandheating.com/leak-detection/