Mains Laying & Diversion
- Hertfordshire External Moling
- London External Plumbing
- Bedfordshire Water Leak Repairs
- Buckinghamshire Water Mains Replacement
- Hertfordshire Supply Pipe Repairs
- London Emergency Plumbing
- Bedfordshire Leak Detection
- Buckinghamshire Common Supply Works
Hertfordshire Mains Laying & Diversion Services
Water Mains Installation, Repair, and Diversion Services
At Brennan Moling – External Moling, we offer a comprehensive range of water mains construction and rehabilitation services. This includes the installation, repair, and diversion of water mains of all types and sizes, using the latest technology in pipe repair, leak detection, and mains diversion techniques.
Our capabilities include:
- Conventional open cut
- Slip lining
- Pipe bursting
- Directional drilling
Whether you require large-scale mains laying or a more tailored approach for smaller projects, we can deliver a bespoke design service for both commercial and domestic applications.
Our additional services include:
- Water main diversions
- Fire hydrants and washouts
- Lead pipe renewal
- New build service installations
We take pride in listening to our clients’ needs and are committed to delivering the most cost-effective and efficient solutions for each unique project. Our team works closely with some of the largest water companies in the UK to ensure a high standard of service with minimal disruption to both clients and contractors.
If you have an upcoming project and would like to find out how our services can support you, please don’t hesitate to get in touch with our experienced team.






Brennan Moling are the experts in water supply pipe replacements.
If you require a new water main from the meter to the house, look no further than the mains water supply replacement experts Brennan Moling. Many older homes were originally piped with either galvanised, copper or lead materials, and over time may have developed leaks along the way, particularly common in the water main pipe to the house.
These pipes when leaking or burst may often go unnoticed until you get a large water bill as they are generally under ground and not noticable. Low water pressure, rusty coloured water, and leaking pipes are just a few of the symptoms of poor quality piping. All will lead to pipework replacements.
External Moling Experts
Brennan Moling’s team have over 20 years of combined moling experience built up on hundreds of properties and sites. This means, no matter which one of our engineers turn up, we will always deliver a top notch professional service, no matter which type of work you require at your property. Lead pipe repair, lead pipe replacement, water supply pipe upgrade due to low water pressure or more!
- Emergency Pipe Repair
- Emergency External Plumbing
- Emergency Water Leak Repairs
- Emergency Water Mains Replacement
- Hertfordshire External Moling
Why You Should Choose Us Brennan Moling
24/7 Availability to assist you with any water main enquiries or emergencies—day or night. Trusted Across London, Hertfordshire, Beds & Bucks supporting all Customers to trust us to handle their water mains emergencies with reliability and professionalism when it’s needed.
Clear & Honest Pricing, we have a transparent pricing method, offering Free estimates and detailed quotes to explain the cost of our Water main services.
- We Provide Qualified Plumbers
- Quality Workmanship
- Experienced
- Reliable
- Water Mains Replacement (check out our Photo Gallery)
- Leak Repairs
- New Water Supply
- Services to Improve Water Flow
- Mole Cable Ducts
- Telephone Ducting
- Storm & Foul Sewer Drainage
- Manhole Repairs works undertaken
- All Levels of Reinstatement Works
- Fixed prices all work quoted
- WIAPS / WATERSAFE Approved
- £5m Public Liability Insurance
- Always here to help
