Understanding Water Mains with ASL Limited

Most people think a leaking water main is only about lost water.

In reality, there is often much more going on underground than people realise.

At ASL Limited, we regularly see hidden damage caused when old water supply pipes leak beneath gardens, driveways, and access roads.

Older Properties Often Share Underground Trenches

Years ago, it was common for different underground services to be installed close together, and sometimes in the same trench.

That can mean:

• Water supply pipes,
• Old clay drainage pipes,
• Surface water lines,
• Foul drainage runs.

All sitting close to one another underground.

When a water main begins leaking, the escaping water can gradually wash away supporting ground around nearby drainage pipes.

How a Leak Can Damage Drainage Systems

A long-term leak may cause:

• Soil movement,
• Undermining beneath old clay drains,
• Joint separation,
• Pipe cracking,
• Ground settlement,
• Drain collapse in severe cases.

Old clay drainage systems are especially vulnerable because many rely on surrounding ground support and older jointing methods.

Why Customers Often Miss the Link

A customer may notice:

• Low water pressure,
• A wet driveway,
• Subsidence signs,
• Repeated drain blockages,
• Sinking paving,
• Cracked pipework found on survey.

They may not realise the leaking water main could be the root cause.

That is why proper investigation matters.

Insurance and Accidental Damage

In some cases, resulting damage may fall under accidental damage or escape-of-water related sections of insurance policies, depending on cover and circumstances.

Good evidence is essential.

This usually means:

• Clear site photographs,
• CCTV drain footage,
• Location tracing,
• Written explanation of cause and effect,
• Repair recommendations,
• Costed remedial options.

What ASL Limited Does

We do not just repair visible symptoms.

We help customers understand the chain of events underground.

Our approach may include:

• Leak investigation,
• Water main tracing,
• CCTV drain surveys,
• Photographic evidence,
• Detailed written reports,
• Insurance support information,
• Repair of damaged drains,
• Replacement of failed water supply lines.

A Real-World Example

A customer believes they only have a blocked drain.

Our inspection finds an old leaking water main washing away support under a clay line, causing movement and collapse.

Fixing only the blockage would miss the true problem.

Need Help With Underground Water Main or Drain Damage?

If you suspect a hidden leak, recurring drainage issues, or unexplained movement on your property, early investigation can save significant costs later.

ASL Limited provides practical investigations, reports, repairs, and experienced underground solutions across Guildford and surrounding areas.

Call ASL today on 0800 181 684 for clear advice and proper diagnosis.