Blocked Drains & Diagnostics

Let’s Get Things Flowing Again

A blocked drain is more than just a nuisance; it can be stressful and messy. At ASL, we don’t just unblock your drains, we investigate the root cause to stop the problem from coming back.

In short: We clear the blockage and find the cure. We give you a permanent fix, not just a quick patch-up job.

ASL Limited drainage engineer clearing a blocked drain with rods on site in Surrey

What We Can Clear For You

We tackle blockages in both your waste pipes (foul drains) and rainwater pipes (surface water drains). We can help with:

  • Toilets that are backing up due to outside drain issues.
  • Ground-floor sinks causing trouble because of blocked external pipes.
  • Manholes and inspection chambers in your garden or driveway.
  • Rainwater downpipes and gully outlets.
  • Soakaways that aren’t draining away water.
  • Commercial drainage for businesses.

A quick note: We generally deal with the drainage system. If your bath or shower is blocked, that is usually an internal plumbing issue, which requires a slightly different type of trade.

Why Do Drains Get Blocked?

Blockages happen for many reasons. Sometimes it is a one-off accident, but often it is due to:

  • Kitchen habits: Fat, grease, and food waste sticking to the pipes.
  • Bathroom items: Wet wipes and sanitary products (even the ones that say ‘flushable’).
  • Nature: Tree roots growing into the pipes or silt and leaves washing into the system.
  • Wear and tear: Scale build-up, cracks, or old pipe materials giving up.
  • Building issues: Debris from renovations or pipes that were installed with the wrong gradient.

If you have a blockage that is easy to clear but keeps coming back, it is a sure sign there is a deeper defect hiding underground.

How We Fix It: Our 5-Step Process

We believe in being thorough. Here is what happens when you call ASL:

1. The Initial Look – We start by checking your access points—like manholes and gullies—to pinpoint exactly where the blockage is hiding.

2. High-Pressure Water Jetting – We use powerful jetting equipment to blast through the obstruction to restore flow to the drain as part of the blocked drain service. If the drains have a large build up of scale, debris, drain fats, silt, etc then recommendations will be given to to carry out further jetting to methodically clean and remove the built up substances to ensure they do not contribute to further blockages.

3. Mechanical Cleaning – If the blockage is inside or in a narrow pipe, we might use flexible tools like spring rods or ‘Sanisnakes’ to physically break up the clog.

4. The Camera Check (CCTV) – Once the water is flowing again, we often recommend using a special CCTV drain camera. This allows us to see inside the pipe and check for:

  • Tree roots getting in.
  • Cracks or collapsed sections.
  • Displaced joints or stubborn scale. This step is vital for your peace of mind—it tells us if your drain is healthy or if trouble is brewing.

5. Honest Recommendations – If our camera spots a problem, we will explain it to you clearly. We might suggest a specific repair, such as root cutting, descaling, or drain lining. We will always explain why it is needed and will provide a report if extra work is required.

Drainage engineer rodding a blocked drain to clear the blockage

Who We Help

We are here for everyone

Whether you are a homeowner, a landlord, or managing a commercial site (like a pub, school, or office), we have the kit and the expertise to handle the job.

Why Choose ASL?

  • Fast response to get your life back to normal.
  • Permanent solutions because we find the cause, not just the symptom.
  • No mess, no fuss with our safe and tidy methods.
  • Clear communication so you know exactly what you are paying for.

Need help with a blocked drain? Let ASL sort it out for good.

Areas we cover

Surrey, Hampshire, Berkshire, West Sussex and South West London

The ASL Limited HQ is in Guildford, but our operating area is the whole of Surrey and parts of Berkshire, Hampshire, West Sussex and South West London.

Map showing areas we cover in Sussex, Hampshire, Berkshire, West Sussex and South West London

Postcode Checker

Enter your postcode to check if we cover your area

SubmitYou postcode is within our area. Get in touch directly below.Your postcode is outside of our operating area.

Contact Us

Get in touch today

You can call us on 0800 181 684, email info@asllimited.co.uk or use the form below: