Ferenc GulyasLeak Detection Engineer at ADI

Plumbing & Heating and Water Mains Specialist · Based in Kessingland, Suffolk

Ferenc Gulyas is a leak detection engineer specialising in identifying hidden water leaks using thermal imaging, acoustic listening equipment, and tracer gas.

20 years Plumbing & Heating experience

1,500 Jobs since 2020

0800 731 3843

CIPHE accredited

WIAPS member

£5m public liability insurance

THE UK'S #1 LEAK DETECTION SPECIALISTS

Ferenc is part of ADI Leak Detection — the UK's leading leak detection specialist with 1,250+ five-star Trustpilot reviews, full CIPHE and WIAPS accreditation, and £5 million public liability insurance.

Why Trust Ferenc to Find Your Leak?

Ferenc brings 20 years in plumbing and heating alongside 6 years of dedicated leak detection work, with particular expertise in central heating and water mains. He holds a Plumbing NVQ Level 2 and has 15 years of central heating powerflushing experience, which means he understands heating systems in detail before any investigation begins. ADI is CIPHE and SPATA accredited, and Ferenc operates under that framework with £5 million public liability insurance.

Engineer Facts

Plumbing & Heating Experience 20 years

Leak Detection Experience 6 years

Commercial Plumbing Experience 5 years

Central Heating Powerflushing Experience 15 years

Qualified Plumbing NVQ Level 2

Leak Detection Jobs Completed For ADI Since 2020 1,500

Leak Detection Case Studies by Ferenc Gulyas

Recent leak investigations carried out by Ferenc Gulyas across central heating, water mains, underfloor heating and bathroom leak detection.

wet stained floor in kitchen doorway before leak detection works

unvented hot water cylinder and copper pipework in garage at initial inspection before works started

Internal Cold Mains Leak Bradwell

Internal Cold Mains Leak / Bradwell

At a property in NR31, the customer noticed a damp area in the kitchen doorway along with visible water damage to the skirting boards in the kitchen. Leak traced to redundant pipework in kitchen doorway; isolated and capped.

Found

tracer gas detector in use at main entrance doorway during leak detection

dual-gauge pressure test kit on board in use during leak detection survey

Underground Water Mains Leak Ipswich

Underground Water Mains Leak / Ipswich

No visible evidence of the leak was present when the engineer arrived. Underground mains leak found beneath driveway, coupling replaced.

Found

dual-gauge pressure test rig set up on patio during leak detection

tracer gas detector probe being swept across kitchen floor during leak detection

Internal Cold Mains Leak Lowestoft

Internal Cold Mains Leak / Lowestoft

The occupant of a property in NR32 had been receiving unexpectedly high water bills despite no obvious increase in water use. Leak found beneath kitchen floor on MDPE connection, repaired.

Found

thermal imaging camera screen showing heating pipe runs beneath vinyl floor during leak detection

damp meter reading 99.9 on concrete floor surface during leak detection

Central Heating Leak Chelmsford

Central Heating Leak / Chelmsford

A property in CM11 was experiencing a persistent loss of pressure in the central heating system, dropping noticeably twice a day. Cracked 28mm copper pipe found beneath hallway floor, repaired.

Found

Internal Cold Mains Leak Hertford

Internal Cold Mains Leak / Hertford

The property had underfloor heating running throughout the downstairs, with hot, cold, and heating system pipework all running beneath floor level. Leak found on copper pipework beneath kitchen floor, repaired.

Found

rear garden paved area with exposed soil patch before leak detection works

tracer gas detector unit on brick paving beside external pipework during leak detection

Underground Water Mains Leak King's Lynn

Underground Water Mains Leak / King's Lynn

The customer at a property in PE30 noticed a water leak somewhere on the property, either internally or externally, and contacted a specialist to investigate. Underground mains leak on lead pipe in back garden, repaired.

Found

dual-gauge pressure test kit connected to external mains pipework during leak detection

water meter inside footpath chamber inspected during leak detection survey

Underground Water Mains Leak East Dereham

Underground Water Mains Leak / East Dereham

The internal stopcock was found inside the kitchen sink unit, next to the water softener. Underground mains leak located next to drainage manhole, pipe replaced.

Found

two underfloor heating manifolds in utility room cupboard before leak detection works

underfloor heating manifold pipework in utility cupboard before works started

Central Heating Leak Beccles

Central Heating Leak / Beccles

The heating system at a property in NR34 was losing pressure on a recurring basis. Leak found beneath living room floor, cracked push fit fitting replaced.

Found

external drain-off point emerging through rendered wall before leak detection works

dual-gauge pressure test kit laid out on decking during leak detection

Central Heating Leak Hemsby

Central Heating Leak / Hemsby

No visible evidence of a leak was present on arrival. Leak found beneath small bedroom floor, pipes replaced.

Found

Reviews of Ferenc's Work

Verified Trustpilot reviews

Real Trustpilot feedback from customers Ferenc has attended.

★★★★★ 17 Apr 2026

Many thanks for caring out works ADI…

Many thanks for caring out works ADI Leak Detection, and special thank you to Ferenc Gulyas a great ambassador to your compony , he was a true professional explained everything he was going to do , ever question I asked he took time to explain and was not a problem to him , carried out works gave me full update and stayed whilst I had to contact water board to ensure explanation I gave correct , when finished you would not he had even been in kitchen super many thanks

★★★★★ 3 Dec 2024

Frank (Ferenc Gulyas) from ADI - top professional

Frank on 1st job day found where is the leak, and also did the internal (inhouse) pipe replacement. Although re 2-nd day job was forgotten to book by ADI (not by Frank), after my call to ADI it was quicky resolved. Based on that Ferenc Gulyas (and Krzysztof Kobylinski) did an excellent job on a 2nd day: all was done in very high professional way, top quality, and after the job was finished making tidy all the access points. Great work, happy customer.

★★★★★ 10 Feb 2023

Bravo

Ferenc Gulyas is a remarkably efficient and polite man.

★★★★★ 6 Oct 2022

Long-standing leak finally located and fixed

Ferenc (Frank) was wonderful. He asked a few questions as to where we had got to with the leak, asked to be shown the taps in the house and then outlined what he was planning to do. He was incredibly reassuring, and made sure I had plenty of water "saved" for the day before he turned off the supply, and quietly got on with the work. He talked me through all the equipment he was using, showed me how he had detected the leak, and tried to get access causing the least damage possible (unfortunately for us it was in a wall below floor level, but Ferenc tried his hardest to first access through an inspection hatch). He made sure I was happy with the access damage and that I wanted him to go ahead and repair the leak before getting access, and had showed me using a camera feed exactly why the leak was occurring and how it could be fixed before opening the floor. We had a number of plumbers, water company employees and external leak detectors come out over the past weeks who were unable to help, so it was a delight to have Ferenc come in so quietly confident, carefully get on with the job and be so considerate to our property and to my time.

★★★★★ 19 Jan 2022

ADI - Star players

Contacting ADI was easy, their staff was helpful and their treatment was understanding and professional. Ferenc (aka Frank) the engineer was a true professional crafts man. From the moment he arrived he did not stop (even for lunch) until he had found the leak and fixed it by rerouting the pipework to cause minimum disruption to our kitchen/dining room. Was respectful of my wife's medical conditions and made every effort to cause minimal disruption. If there was an option to give more stars as a rating I would.

★★★★★ 5 Nov 2021

A really great professional company

A really great professional company. They communicated well and were courteous and helpful at all times. The plumber Ferenc did a great job identifying the leak and mending it. Without ADI’s help I think we would still be without heating or hot water.

Ferenc's Leak Detection Services

Equipment & Methods

Tracer Gas
Thermal Imaging
Borescope Cameras
Acoustic Listening Equipment
Moisture Meters

“

About Ferenc

Ferenc has spent two decades working across plumbing, heating, and commercial plant room installation before moving into specialist leak detection. He knows central heating systems and water mains thoroughly — not just how to find leaks in them, but how the systems are built and why they fail. When he is not tracing a hidden leak under someone's floor, he can usually be found enjoying a good carvery. That straightforward, no-fuss attitude carries into the way he works on site.

Frequently asked questions about Ferenc

What does Ferenc specialise in?

Ferenc specialises in central heating leak detection, water mains leak detection, and underfloor heating leak detection, alongside bathroom leaks, drain leak investigation, and underground pipework. He is particularly known for his depth of knowledge in plumbing, heating systems, and water mains. Tracer gas, acoustic listening, and thermal imaging are the primary methods he uses across these areas.

How does Ferenc detect hidden leaks?

Thermal imaging cameras read surface temperature variations to show where water is tracking through a floor or wall without any physical intervention. Acoustic listening equipment detects the sound signature of a pressurised leak through solid materials, while tracer gas is used when a more direct trace is needed on sealed pipework. Borescope cameras allow visual inspection inside confined spaces, and moisture meters confirm the presence and extent of damp in surrounding materials.

What experience and qualifications does Ferenc have?

Ferenc has 20 years in plumbing and heating, 6 years in leak detection, 5 years in commercial plant room installation, and 15 years in central heating powerflushing. He holds a Plumbing NVQ Level 2 and has hands-on experience across both domestic and commercial environments. His background in plant room installation gives him a strong understanding of more complex heating and water supply configurations.

What types of properties does Ferenc work on?

Ferenc works on both residential homes and commercial properties across Cambridgeshire, Essex, Norfolk, and Suffolk. On the domestic side, typical jobs include leaks in central heating systems, underfloor heating circuits, water mains supply pipes, and bathroom plumbing. His commercial background means he is equally comfortable on larger, more complex sites with plant room installations or multiple-circuit heating systems.

When should you call Ferenc for leak detection?

If you have unexplained damp patches, rising water bills, a drop in heating system pressure, or warm spots on a floor, those are all reasons to arrange a professional investigation sooner rather than later. Hidden leaks in underfloor heating or buried supply pipes can cause significant structural damage if left untreated. Call ADI Leak Detection on 0800 731 3843 to book an investigation — ADI will aim to assign Ferenc where he is available in your area.

How Ferenc finds your leak

Ferenc follows a consistent five-stage process on every visit. The approach is non-invasive and designed to isolate the fault before any disruption to your property.

Initial assessment. Review symptoms with the customer, check visible evidence, and identify the most likely system involved.
Selection of the right detection method. Pick the combination of thermal imaging, tracer gas, acoustic listening, or moisture mapping most likely to isolate the fault.
Non-invasive testing. Run the chosen method across the candidate area — no excavation or destructive investigation until the leak is confirmed.
Leak confirmation. Cross-verify the finding with a second method where possible, mark the exact location, and document the evidence.
Reporting and next steps. Provide a written report, photographs, and recommended repair options.

What Ferenc Gulyas Does

Services and systems

Ferenc works across central heating, underfloor heating, water mains, bathroom plumbing, drains, and underground pipework.
His specialisms cover leak detection in each of these systems as well as drain leak investigation and leak correlation on buried supply pipes.

Coverage

Ferenc covers Cambridgeshire, Essex, Norfolk, and Suffolk, working across both rural and urban properties throughout the East of England.

Property types and complexity

Ferenc works on both residential and commercial properties, drawing on 5 years of commercial plant room installation experience alongside his domestic work.
He is particularly well suited to central heating and water mains investigations, handling everything from straightforward internal leaks to buried supply pipes requiring underground detection.
His 20 years in plumbing and heating means he can assess the condition and layout of a system quickly, which helps focus the investigation.

Areas Covered

Ferenc carries out leak detection surveys across East Anglia. His work includes domestic and commercial investigations involving central heating, water mains, underfloor heating, bathroom, and drain leaks.

Book a Leak Detection Survey

ADI Leak Detection aims to provide next-day availability across the UK — call today for a quote.

0800 731 3843