Water Main Replacement & Installation
Fast, compliant water supply pipe replacement from boundary to house, with minimal disruption to your driveway or garden.
Common Problems We Solve
If you're experiencing any of the following, your water main may need replacing:
- Water coming up through your driveway or garden
- Sudden drop in water pressure
- High water bills with no visible leak
- Old lead or shared water supply pipes
- Burst or leaking underground water mains
- Full end-to-end service
- Fixed price before work begins
- No hidden costs
- Certification included
Our Water Main Replacement Service
We provide a full end-to-end service from diagnosis through to installation and certification.
Excavation
At boundary stop valve and property entry point only
Trenchless Moling
Where suitable - no need to dig up your driveway or garden
New MDPE Pipe
High-quality medium density polyethylene supply pipe installed
New Stop Valve
Internal stop valve with double check valve and drain-off fitted
Pressure Testing
Full pressure test of the system on completion
Full Reinstatement
All surfaces reinstated and site left clean and tidy
All installations are carried out to current Water Regulations and industry standards.
How We Install Your New Water Main
Most domestic water mains are replaced using moling (trenchless technology), which allows us to install a new pipe underground with minimal disruption.
In most cases, your driveway, patio, or garden remains completely untouched.
Can It Be Repaired Instead?
In some cases, a repair may be possible. However, if the pipe is old, leaking in multiple places, or undersized, a full replacement is usually the most cost-effective long-term solution.
We'll always give you an honest assessment - if a repair is the right answer, we'll tell you.
Where required, we also install pipe entry systems such as an Insuduct groundbreaker to bring the new supply safely into the property without internal excavation. This is charged separately depending on the setup.
Ask Us About Your PipeBenefits of Upgrading to MDPE Water Mains
MDPE (Medium Density Polyethylene) is the modern standard for water supply pipes - here's why it's worth it.
No More Leaks
Highly flexible, resistant to cracking and ground movement. Unlike old lead or steel pipes, it won't deteriorate over time.
Better Pressure & Flow
Eliminates restrictions from buildup and undersized pipes. Stronger pressure and better flow to multiple outlets.
Corrosion Resistant
Doesn't rust, corrode, or build up internal scale. Your water keeps flowing properly for decades.
Perfect for Moling
Flexible enough for trenchless installation - no digging up driveways, long continuous runs with fewer joints.
50+ Year Lifespan
Designed to last over 50 years with minimal maintenance. A true fit-and-forget solution.
Reduces Long-Term Costs
Old mains cause repeated leaks and high water bills. Full replacement is usually cheaper long-term than patch repairs.
Fully Compliant
Meets current UK water regulations, accepted by water authorities, and certification adds value when selling your property.
Removes Lead Pipe Risk
Older properties may still have lead supply pipes. Upgrading to MDPE eliminates contamination risk and improves water quality.
Why Choose GC Maintenance?
Our Area of Operation
Based in South East London, we carry out water main replacement and installation across Kent, South London, and surrounding areas.
Frequently Asked Questions
Common questions about water main replacement
How much does water main replacement cost?
Most domestic water main replacements are carried out at £90 per metre from the boundary stop valve to the internal stop valve. Final cost depends on access and installation requirements. We provide a clear, fixed price before work begins - no surprises.
How long does a water main replacement take?
Most domestic replacements are completed within a day or two. The moling process is significantly faster than traditional trenching, which means less time on site and less disruption to you.
Will my water supply be interrupted?
There will be a temporary interruption while the connection is made, but this is usually just a few hours. We plan this in advance and let you know exactly when to expect it.
Will you dig up my driveway?
In most cases, no. We use trenchless moling technology which only requires small excavations at the boundary and entry point. Your driveway, patio, or garden typically remains completely untouched.
Do you provide certification?
Yes. All our installations are certified and meet current Water Regulations. Certification is provided on completion and can be useful when selling your property.
Can a leaking water main be repaired rather than replaced?
Sometimes. If the pipe is relatively new and the leak is isolated, a repair may be viable. However, if the pipe is old, made of lead, or leaking in multiple places, a full replacement is usually more cost-effective long-term. We'll give you an honest recommendation.
Get a Fixed Price Quote Today
Most domestic water main replacements from only £90 per metre - clear pricing, no surprises, certified on completion.