Moling Company in Horsham: Trenchless Lead Pipe Replacement Across RH12–RH13
We’re T&L Moling Contractors, WIAPS-registered specialists in trenchless water supply pipe replacement across Horsham and the surrounding RH12 and RH13 postcodes, including Roffey, Littlehaven, Holbrook and North Heath. The town has roughly 4,000 Victorian terraced houses, and many were originally plumbed with lead supply pipes still in the ground today.
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About Us
Horsham is a Victorian terrace town first and foremost. After the railway arrived in 1848 the town expanded quickly, and around 4,017 terraced and townhouse properties (roughly 19% of its homes) went up north of Brighton Road and around the station, the majority of them in the Victorian era. Streets through the town centre, Carfax and Causeway, out towards Roffey, Littlehaven and Trafalgar, are dominated by 19th-century housing, while later suburbs like Holbrook are largely 20th-century. The lead supply pipes from that period are still in place under a lot of front paths, and that is the work our trenchless method is built around.
The approach on a Horsham terrace is shaped by the housing: narrow front gardens, period boundary walls, often a bay window directly over where the supply pipe enters. We dig two small access pits, drive an impact mole through the ground between them, and pull a new MDPE pipe in behind it. Your tiled path, lawn and frontage stay intact. Most residential jobs are completed in a single day.
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Why choose us?
Fast turnaround & competitive pricing
Minimal mess & no trenches
Fully approved & insured
Friendly, professional service
What is Moling?
Trenchless moling is a no-dig way of replacing a buried water supply pipe, and it suits Horsham particularly well because of the terraced housing layout and the Weald Clay underneath. The Low Weald’s heavy, poorly draining mudstone makes open trenching slow and messy, and around Tower Hill the sandstone ridge of Horsham Stone is harder still to dig through. With moling we excavate two small pits (one near the boundary stop tap at the pavement, one near the property where the pipe enters), then drive an impact mole between them along the existing pipe route. A new MDPE supply pipe is pulled in behind the mole, fitted internally with a stop valve, double check valve and drain-off point. The old lead pipe is disconnected at both ends and left in the ground. On a Weald Clay site, leaving the ground between the pits undisturbed is a real advantage over an open trench.
Why Replace Lead Pipes?
Horsham has some of the hardest water in our coverage area, running very hard at around 240 to 280 ppm through Southern Water’s Sussex North supply. Hardness aside, the lead in tap water comes from the pipe itself, dissolving into water that has sat overnight in an old lead supply line. With somewhere around 4,000 Victorian and Edwardian terraces in the town, many still on their original lead, Horsham has a lot of those pipes still in daily use.
Most Horsham homeowners get in touch after one of these:
- A failed lead test or a flag from their plumber
- A letter from Southern Water about lead in the supply
- Discoloured or metallic-tasting tap water
- Noticeably low water pressure compared to neighbours
- A solicitor or surveyor raising it during a property sale
Replacing the lead supply pipe with MDPE via trenchless moling is the standard fix, and on a typical Horsham Victorian terrace it is a single-day job that leaves the period frontage intact.
Key Benefits of Moling
No-Dig, Mess-Free Installation
Protects your landscaping and driveway.
Replaces Old Lead Supply Pipes
Meets modern water safety standards.
Improves Water Pressure
Smooth, wide pipes enhance flow.
Provides Cleaner, Safer Water
Eliminates contamination risk.
Faster & More Affordable
Reduces labour and reinstatement costs.
Our Services
Lead Water Pipe Replacement
Water Main Supply Pipe Replacement
Replacing Water Mains from House
Electric Armoured Cable Installation
Utility Installations
Service Areas (40-Mile Radius of Guildford)
- Surrey
- Hampshire
- Berkshire
- Buckinghamshire
- Oxfordshire
- Hertfordshire
- Sussex
- London
Resources & Guides
Lead Pipe Replacement Cost in 2025 – A Homeowner’s Guide
Typical cost: £800–£2,000, depending on pipe length, access, and surface type. Trenchless moling helps avoid costly restoration work — and we always provide fixed, transparent quotes.
- Discoloured or metallic-tasting water
- Low water pressure
- Frequent leaks or damp spots
- Property built before 1970
- Visible corrosion or old lead/steel pipes
1. Site Survey
2. Moling Setup
3. Pipe Installation
4. Connection
5. Restoration
Most jobs are completed within one day.
07554 708609 Get a quick quote
Areas we cover
Hampshire & Surrey borders: Aldershot, Basingstoke, Camberley, Farnborough, Fleet, Frimley, Hook
South West Surrey: Farnham, Frensham, Godalming, Guildford, Haslemere, Hindhead
North Surrey & Thames: Addlestone, Chertsey, Egham, Epsom, Kingston, Leatherhead
South London: Bromley, Croydon
Sussex & South Surrey: Crawley, Horley, Horsham
© 2026 T&L Moling Contractors
Experts in Trenchless Moling & Lead Pipe Replacement across Horsham and the surrounding areas.