Our Specialism

    Moling Contractor Serving East Grinstead & Sussex

    Replace old water mains and lay new underground pipes without digging up your garden, drive or paving. Fast, clean, fixed-price.

    Typical job
    1 day
    From
    £80/m
    Trench dug
    0 m
    • Fully Insured
    • Fixed Written Quotes
    • 5★ Rated Locally
    • Sussex & Surrey
    The technique

    What is moling?

    Moling is a trenchless underground boring technique that allows us to install new pipework without digging a trench. We drive a mole — a pneumatic boring tool — underground between two small access pits, threading new pipe through as it goes. The result is a fully replaced pipe with minimal disruption to your garden, driveway or landscaping. It's faster, cleaner and far less disruptive than traditional trenching methods.

    Moling — sometimes called impact moling or trenchless pipe replacement — is the modern way to install or replace underground pipes without digging an open trench.

    We dig two small pits, one at each end of the run. A pneumatic piercing tool is fired horizontally through the soil between them, pulling the new MDPE pipe behind it. The result: a brand-new water main or service pipe, with your lawn, paving and landscaping left exactly as we found it.

    It's the standard approach for replacing failing lead or galvanised water mains across older Sussex and Surrey properties.

    Moling access pit showing new blue MDPE pipe being installed through concrete surface — East Grinstead
    Moling access pit through concrete — new MDPE pipe installed underground with just one small entry and exit point.
    Trenchless moling access pit in gravel driveway — Grange Plumbing Sussex
    Access pit in gravel driveway. The new pipe runs underground between two pits like this — no trenching required.
    Common scenarios

    When is moling used?

    • Water main replacement under driveways, paths or gardens
    • New water supply connections to properties
    • Pipe replacement under roads or paved surfaces
    • Any situation where trenching would cause unacceptable disruption
    How it works

    Four steps. No trench.

    A typical domestic water main replacement, start to finish in a single day.

    1. 01

      Survey & quote

      We assess the route, locate existing services and give you a clear fixed price.

    2. 02

      Two small access pits

      Just an entry and exit point — no trenches across your garden or driveway.

    3. 03

      Pneumatic mole launched

      An air-driven mole bores a clean tunnel and pulls the new MDPE pipe through.

    4. 04

      Connected & tested

      We pressure-test, reinstate the pits and leave the site as we found it.

    The advantage

    Why choose moling over a trench?

    No trenches

    Lawns, driveways, paths and patios stay intact — only small entry and exit pits are needed.

    Faster jobs

    A typical domestic water main replacement is completed in a single day.

    Lower total cost

    You save on excavation, spoil removal and reinstating turf, paving or tarmac.

    Versatile

    Suitable for water mains, gas (with Gas Safe partner), drainage and electrical ducting.

    When it fits

    When is moling the right choice?

    Moling is the go-to method for most domestic underground pipework jobs where preserving the surface matters.

    5 common use cases
    01

    Replacing old lead, galvanised iron or worn polythene water mains

    02

    Installing a new water supply to an outbuilding, annexe or garden tap

    03

    Running drainage or duct under a driveway, path or lawn

    04

    Avoiding costly reinstatement of block paving, tarmac or block-laid driveways

    05

    Repairing a leaking supply pipe without digging up the whole run

    Pricing

    Moling cost per metre — UK guide

    Pricing depends on pipe diameter, run length, ground conditions and access. As a working guide for the UK in 2025:

    25mm MDPE water main

    £80–£150 / m

    32mm MDPE service pipe

    £100–£180 / m

    Indicative only — every site is different. We always provide a fixed written quote after a free site visit so you know the total cost up front, including connecting to the stopcock, pressure testing and reinstating the small entry/exit pits.

    Read the full moling cost guide
    Factor
    Moling
    Open trenching
    Surface damage
    Two small pits
    Full trench across run
    Typical timeline
    1 day
    2–4 days
    Reinstatement
    Minimal
    Turf, paving, tarmac
    Disruption to drive
    None
    Driveway out of use
    Coverage

    Moling across Sussex & Surrey

    Based in Crawley, we cover the whole of West Sussex, East Sussex and Surrey for moling and water main replacement.

    10+ towns served
    Questions

    Moling — frequently asked

    Moling is the method we use for water main replacement — find out more about our water main replacement service.

    Areas We Cover

    Grange Plumbing provides moling across Sussex & Surrey

    • East Grinstead
    • Crawley
    • Haywards Heath
    • Horley
    • Burgess Hill
    • Lingfield
    • Forest Row
    • Copthorne
    • Turners Hill
    • Felbridge
    • Oxted
    • Redhill
    • Reigate
    • Cuckfield
    • Lindfield

    We also cover all surrounding areas of West Sussex and Surrey. Not sure if we cover your area? Call us on 07894 956041.

    Get in touch

    Need a moling quote?

    Free site visit, fixed written price, no obligation. Most quotes turned around within 24 hours.

    • Fully insured
    • Sussex & Surrey
    • No call-out fees

    Mon–Fri 8–6 · Sat 9–4

    📞 Call Now — 07894 956041