Mains Water Consulting Engineers
Thames Water Approved and Watersafe registered.
Hydronic Installation Condition Report generation – a detailed report summarising the condition of your installation
Consultancy
Water Mains
Domestic/commercial water mains and lead pipe services






The Director
Hello, I’m Marlon Williams MEng EngTech FCIPHE MIET.
As well as holding a Masters in Engineering Management, such is the depth of my industry experience I have been appointed the highest status possible, that of a Fellow, to the Chartered Institute of Plumbing and Heating Engineering, the only professional body for plumbing and heating in the UK.
My aim is to take all of my skill and experience gained over 15 years of working on residential new builds, hospitals, data centres etc, and delivery you a top end service and performance.
As a member of the Institute of Engineering and Technology (IET), being controls and automation trained as a Loxone Partner and being a certified City & Guilds Level 4 Electrical Designer, I am always looking to implement innovative controls solutions that facilitate resource optimisation and energy efficiency.
You can trust us to delivery on your water mains and hydronic needs.


Esteemed Fellow – Charted Institute of Plumbing and Heating Engineering
Do you require an elite engineer to deliver on your hydronic system needs?
Get in touch today to discuss your project with an approved water engineering specialist.
Services
Water Mains Installations
As Thames Water and Watersafe Approved contractors, we provide a comprehensive domestic and commercial water mains service, encompassing:
Leak detection (water mains or heating)
Domestic and commercial water mains repairs and full installations, including lead pipe work applications
All correspondence with Thames Water e.g Lead Replacement Scheme applications
Modbus water measurement installations and automated leak detection solutions





Do you require administrative or engineering support with your Thames Water matter?
HICR – Hydronic Installation Condition Report of plumbing, heating, cooling and renewables systems
We support self-builders, architects, property owners and others by providing an independent technical voice to their project, ensuring contractors deliver on their promises.
We can carry out design reviews prior to installation works, a property purchase or a building modification to ensure that your appointed contractor firstly has a design, and that the agreed design intent is followed through, irrespective of time or cost constraints etc that may arise.
We can actively monitor an ongoing installation, carrying out best practice, legislative and quality control reviews, introducing written quality control plans where required. These will include milestone stop points, such that all issues are rectified before the next stage of works begin e.g. backfilling, cement laying, wall erection, building of custom cabinetry etc.
We can establish clear commissioning plans in line with legislative, manufacturer and performance requirements to ensure, that at the point of practical completion, the system is functioning as per design.
Less ideally, we can inspect installations post-completion, producing non-conformance reports as required.


See an example of one of our expert, independent evaluations >
Further, see where my competence has been sufficiently trusted to be called as an expert witness for UK court proceedings.
Court report >

Book a provisional call to see how you can utilise our expert services
Testimonials
Real feedback from satisfied clients who rely on us for their water system needs.
"Marlon was extremely professional and helpful throughout. He identified the leak, documented everything with detailed videos, delivered a fast, thorough report, and kept in touch after. 100% recommend Water Mains Engineering UK Ltd – professional through and through."
Robb W
"Marlon Williams is a most impressive man, educated and informed well beyond expectations and a very long way from my previous experience of "plumbers" (which really was all I was looking for). I ended up with a great looking job - down to the last detail - but also with a "find" for any water-related needs in the future."
"I found Water Mains Engineering through Thames Water. Marlon called back within minutes and kept me informed every step. The job was tough old London plumbing, done perfectly and on time. What could have been a nightmare was managed beautifully – highly qualified and knowledgeable."
Clare P
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Andrew A
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Clare P
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Gallery
Explore our projects showcasing expertise in water mains engineering solutions.










