Water Main Installation & Re-Routing
Clean Water, Better Pressure
Your water main is the single most important pipe in your home. It connects your property to the street supply, delivering fresh, clean drinking water to your taps.
Over time, these pipes can wear out, leak, or simply end up in the wrong place if you are planning an extension. At ASL, we install brand-new supply pipes or move existing ones safely and efficiently.
In simple terms: We ensure your home has a reliable flow of water, using modern methods that create minimal mess.

Why You Might Need a New Water Main
Most people don’t think about this pipe until there is a problem. You might need a replacement if:
- You have Lead pipes: Many older homes still use lead supply pipes, which can be a health risk. Modern plastic pipes are safer.
- Low Pressure: If your shower is a trickle or the bath takes forever to fill, an old, narrow pipe might be the cause.
- Frequent Leaks: If you are constantly patching up leaks, it is often cheaper and safer to replace the whole run.
- Building Work: You are building an extension over the current route of the pipe.
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How We Install & Re-Route Water Mains
We know the idea of replacing a main pipe sounds disruptive. However, our process is designed to be fast, tidy, and compliant with all Water Authority regulations.
1. Site Assessment & Scanning – Safety comes first. We survey your property to determine the best route for the new pipe. We use specialist CAT scanners to locate any existing underground electric cables and identify if any other utlilities are likely to be in the area (like gas, drainage, or cable TV) to ensure we avoid them during the installation.
2. The “No-Dig” Moling Method – For most installations, we avoid digging a trench through your garden. Instead, we use Moling.
- We excavate two small pits: a “Launch Pit” and a “Receiving Pit” (usually about 10 meters apart).
- We use a pneumatic (air-powered) “mole” that tunnels underground between the two pits.
- The surface of your driveway, lawn, or patio between the pits remains completely untouched.
3. Excavation (Where Necessary) – If the ground is too stony for moling, or the distance is very short, we may need to hand-dig a trench. We do this neatly and ensure the trench is the correct depth—typically 750mm. This depth is vital to protect your water supply from freezing in winter.
4. Pipe Installation & Connection – We install high-quality blue MDPE (plastic) pipework. This material is durable, corrosion-free, and flexible.
- External Connection: We connect the new pipe to the external stop tap or boundary box in the street.
- Internal Connection: We bring the pipe into your property and connect it to your internal stopcock.
5. Pressure Testing – Before we fill anything in, we pressure test the new system. This guarantees that the joints are watertight and the pressure is stable.
6. Reinstatement – Once the work is tested, we backfill the pits or trenches and compact the soil. We then reinstate the surface—whether it is tarmac, concrete, paving slabs, or turf—leaving your property looking neat and tidy.
Why Re-Route (Move) a Pipe?
Sometimes the pipe is in good condition, but it is just in the wrong place. We typically re-route pipes when Building Extensions. You generally cannot build a new foundation over an existing water main (if it bursts later, you would have to dig up your kitchen floor). We divert the pipe around the new footprint of the building, ensuring it remains accessible and safe.

Who Is This For?
- Homeowners: Wanting to remove lead pipes or improve water pressure.
- Renovators: Building extensions or annexes that need a water feed.
- Developers: Installing supplies for new builds.
- Landlords: Ensuring properties have a safe, reliable water supply.
The Benefits to You
- Minimal Disruption: Our moling technology saves your garden and driveway from destruction.
- Better Performance: New, larger pipes often improve flow rates significantly.
- Healthier Water: Eliminates the risks associated with old lead pipework.
- Long-Lasting: Modern plastic pipes are corrosion-free and last for decades.
Get the water pressure you deserve. Ask ASL about a new water main installation.
ASL ensures every installation is done safely, efficiently and to the highest standard.
Testimonials
What Our Clients Say
“I called at 08:10 hours to report a blocked drain. A little while later, Darren rang to tell me he’d arrive in half an hour. He arrived on time and resolved the problem quickly and without fuss. He was polite and friendly throughout. Within two hours of reporting the blockage, all was well. Thank you.” Customer, Surrey
“I unreservedly recommend ASL. All the glowing reviews of ASL are true. They had to lift paving slabs to fix my drains, and I was concerned there might be unavoidable damage. I should not have worried. Liam and Richard did a superb job. Thanks, ASL” Customer, Surrey
“Darren arrived very promptly and got to work quickly. He did an excellent job and explained what he was doing. We would have no hesitation in recommending ASL Services.” Customer, Surrey
“Very efficient to book them to sort out a sewer drain blockage, and the cost was exactly what they quoted. Called before they arrived with a clear ETA. Got on with the job and sorted it out within the hour. Darren was excellent – very courteous and helpful, did more than we expected to help sort the problem out and was a font of knowledge on all things sewer-related. Given the subject matter (eeew) the whole experience with ASL was an absolute pleasure.” Customer, Surrey
“ASL recently carried out a drain repair at our house. They responded quickly to the call for help, came out and soon diagnosed the problem – tree roots blocking the drain. The remedial work on site was carried out by Lester and George – they worked hard and were very thorough. This is a long-established company that seems to know what they are doing.” Customer, Surrey
Areas we cover
Surrey, Hampshire, Berkshire, West Sussex and South West London
The ASL Limited HQ is in Guildford, but our operating area is the whole of Surrey and parts of Berkshire, Hampshire, West Sussex and South West London.

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Contact Us
Get in touch today
You can call us on 0800 181 684, email info@asllimited.co.uk or use the form below:
