How Much Does Impact Moling Cost Per Metre in London?

The cost of impact moling per metre in London varies depending on several factors, including location, soil type, access restrictions, pipe diameter, and the total length of the installation. While average rates are available, prices can fluctuate based on the complexity of the work and local market conditions.
 

If you're planning to replace your water supply pipe, it's important to understand that homeowners are usually responsible for the pipe running from the internal stop valve inside the property to the boundary where it connects to the public water main.


Factors Affecting the Cost of Impact Moling
 

Ground Conditions

If the ground contains dense clay, gravel, or obstructions like tree roots, the project may require additional labour, tools, or time, increasing the overall cost.

 

Pipe Diameter

Larger water supply pipes require more effort and materials to install, resulting in a higher price per metre.|

 

Length of the Project

While longer distances cost more overall, they can reduce the per metre cost due to improved efficiency over scale.

 

Additional Requirements

Any reinstatement of concrete, tarmac, or block paving, as well as pre-installation surveys or new fittings, will contribute to the final price.

Why Impact Moling Is a Preferred Solution in London

At Greater London Water, we use impact moling as a fast, reliable, and non-intrusive solution for replacing or installing new water supply pipes across all London boroughs.

Impact moling involves a pneumatically powered mole that creates a bore path between two small access points. This technique eliminates the need for long trenches, which makes it ideal for built-up urban areas or properties with landscaped or paved surfaces.


Key Advantages of Impact Moling

 

Minimal Disruption

Because there’s no need to excavate large trenches, moling protects lawns, driveways, flowerbeds, and pavements.

 

Faster Completion

Compared to traditional excavation, impact moling significantly reduces project timelines, minimising inconvenience to your household.

 

Cost-Efficiency

In suitable ground conditions, the reduced labour, excavation, and reinstatement make moling a more affordable option overall — especially when installing a new water supply pipe.

 

How Impact Moling Works

Impact moling is a trenchless method designed for installing new water supply pipes with minimal surface disruption. Our experienced engineers use compressed air-driven impact moles to displace soil and form a path underground.
 

We begin by excavating two small pits — one at the property boundary and one near the point of connection. The mole is then launched from one side and travels underground, creating a clear channel through which the new pipe is pulled. This process results in a smooth installation that connects directly to the existing water main.

 

Common Reasons for Replacing a Water Supply Pipe
 

Lead or Iron Pipes

Many older homes in London still use lead or iron pipes. These materials can corrode over time or introduce contaminants into your drinking water, making replacement essential.

 

Underground Water Leaks

Leaks from damaged or deteriorating water supply pipes can cause subsidence, rising utility bills, and water damage — and often require full replacement rather than temporary repairs.

 

Low Water Pressure

Ageing or undersized pipes can significantly reduce flow, affecting showers, washing machines, and daily use. Replacing your water supply pipe can restore proper pressure.

 

Water Quality Issues

Discolouration, poor taste, or particles in your tap water are often signs of pipe degradation and a signal that replacement is necessary.

 

Home Renovation 

If you’re upgrading your kitchen or bathroom, or increasing your water usage, this is the ideal time to replace your old water supply pipe and ensure it meets future demands.
 

 

Why Replace Lead Water Supply Pipes?

Many properties in London built before the 1970s still have lead water supply pipes in place. These pipes can release lead into drinking water over time — particularly when water is soft, warm, or stagnant.

Lead is a toxic metal that poses a serious health hazard, especially for children, pregnant women, and the elderly. Prolonged exposure to lead-contaminated water has been linked to:

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• High blood pressure
   

• Heart problems
   

• Abdominal pain
   

• Miscarriage or pregnancy complications
   

• Memory loss
   

• Developmental issues in children
   

• Low IQ

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Replacing your lead water supply pipe with an approved modern material such as MDPE (medium-density polyethylene) eliminates this risk and ensures your water is safe to drink.
 

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Benefits of Replacing Your Lead Water Supply Pipe

Upgrading your water supply pipe offers several advantages:
 

Improved Water Flow

Modern pipes have a larger internal diameter, improving water pressure and flow to all taps and appliances.

 

Better Water Quality

Plastic pipes are non-corrosive and non-contaminating, ensuring cleaner, better-tasting drinking water.

 

Greater Energy Efficiency

Better flow reduces the time and energy needed to heat water, lowering your energy bills.

 

Eco-Friendly Impact

Cleaner tap water means fewer households rely on bottled water, helping reduce single-use plastic waste.

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Increased Property Value

​​Up-to-date plumbing is a strong selling point, making your home more appealing to potential buyers.

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​​​Contact Greater London Water for Impact Moling Services Across London
 

Greater London Water specialises in impact moling and lead water supply pipe replacement throughout all London boroughs. Whether you're dealing with old lead pipes, low water pressure, or leaks on your water supply pipe, our team can help — with minimal disruption to your property.

To get a free, no-obligation quote for impact moling or water supply pipe replacement, call us on 0207 1234 996 or email hello@greaterlondonwater.co.uk to schedule your consultation.

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