Plumbing & Heating and Water Mains Specialist · Based in Teddington, Greater London
Mark Pavitt is a leak detection engineer specialising in identifying hidden water leaks using acoustic listening equipment, thermal imaging, and tracer gas.
CIPHE accredited
WIAPS member
Mark 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.
Mark holds NVQ Level 2 and Level 3 qualifications in plumbing and heating, and has spent 14 years working specifically in leak detection alongside 30 years as a plumbing and heating engineer. He is a specialist in plumbing fault diagnostics and carries a health and safety qualification. That depth of trade background means he can assess a leak's cause, not just its location.
Recent leak investigations carried out by Mark Pavitt across central heating, water mains, underfloor heating and bathroom leak detection.
The garden room and gym at a property in SW19 had suffered severe water damage, with walls and flooring saturated throughout the space and its integral bathroom. Mains leak found behind WC boxing; failed pushfit elbow replaced.
A property in HP11 had a confirmed failure on its incoming mains supply, requiring further trace and access work to pinpoint the exact route and condition of the pipework. Mains supply located beneath lounge floor, new riser installed and tested.
Real Trustpilot feedback from customers Mark has attended.
Mark has been working in plumbing and heating for 30 years, and has spent 14 of those years focused entirely on leak detection. He also has 10 years of experience in water mains replacement, so when a buried supply pipe turns out to need more than just finding, he can deal with that too. Away from work he's a Liverpool fan, fishes when he gets the chance, and sings — though by his own admission, not particularly well.
Mark specialises in central heating leak detection, underfloor heating, water mains leak detection, bathroom leak detection, drain leak investigation, and underground leak detection. He is also trained in tracer gas testing, acoustic listening, thermal imaging, leak correlation, borescope camera inspection, and moisture metering. Plumbing and heating fault diagnostics and water mains work are the areas he is best known for.
Mark uses acoustic listening equipment to pick up the sound of escaping water through floors, walls, and ground surfaces without breaking anything open. Thermal imaging cameras reveal wet areas by detecting surface temperature changes, and tracer gas is introduced into pipework to identify breaches where acoustic methods alone are insufficient. Borescope cameras and moisture meters provide additional confirmation in confined or enclosed spaces.
Mark has 30 years in plumbing and heating, 14 years in leak detection, and 10 years in water mains replacement. He holds NVQ Level 2 and NVQ Level 3 qualifications in plumbing and heating, a health and safety qualification, and is a specialist in plumbing fault diagnostics.
Mark works on residential properties across a wide range of sizes and ages, from modern homes with underfloor heating systems through to older properties with more complicated buried pipework. His water mains replacement experience means he is equipped for jobs where a supply pipe under a driveway or external ground needs more than detection alone. He handles straightforward bathroom source traces as well as more involved underground investigations.
If you have rising water bills without explanation, damp patches appearing on floors, walls, or ceilings, or a central heating system losing pressure repeatedly, those are all signs worth investigating properly. Underground or buried supply pipe leaks, underfloor heating faults, and drain issues that haven't been identified by a standard plumber are also situations where specialist detection equipment makes a significant difference. Call ADI Leak Detection on 0800 731 3843 to book an investigation — ADI will aim to assign Mark where he is available in your area.
Mark 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.
Mark works across central heating systems, underfloor heating, water mains, bathroom plumbing, drains, and underground pipework.
His investigations cover leak detection on buried supply pipes through to drain leak investigation and bathroom source tracing.
He uses tracer gas testing where other methods have reached their limit.
Mark covers a wide stretch of southern and eastern England, working across counties including Berkshire, Surrey, Kent, Essex, Hampshire, Devon, Cornwall, and Greater London, as well as Oxfordshire, Wiltshire, Suffolk, and the Isle of Wight.
Mark works on residential properties of all sizes, from standard terraced houses through to larger homes with complex pipework layouts.
His background in water mains replacement means he is comfortable handling jobs that go beyond straightforward internal detection, including buried supply pipes under driveways or gardens.
He is known particularly for plumbing and heating leak work and water mains investigations.
Mark carries out leak detection surveys across Greater London, South East, East Anglia, South West & The Midlands. His work includes domestic and commercial investigations involving central heating, water mains, underfloor heating, bathroom, and drain leaks.
ADI Leak Detection aims to provide next-day availability across the UK — call today for a quote.
