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.

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.
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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.
Signs You Need to Call Us
You probably need ASL if you notice:
- Toilets are struggling to flush.
- Water is coming back up through sinks or appliances.
- Drains are emptying very slowly.
- Unpleasant smells in the house or garden.
- Strange gurgling noises from the plugholes.
- Outside drain covers are overflowing or flooded.

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.
Testimonials
What Our Clients Say
“I called at 08:10 hours to report a blocked drain. A little while later, Darren rang to tell me he’d arrive in half an hour. He arrived on time and resolved the problem quickly and without fuss. He was polite and friendly throughout. Within two hours of reporting the blockage, all was well. Thank you.” Customer, Surrey
“I unreservedly recommend ASL. All the glowing reviews of ASL are true. They had to lift paving slabs to fix my drains, and I was concerned there might be unavoidable damage. I should not have worried. Liam and Richard did a superb job. Thanks, ASL” Customer, Surrey
“Darren arrived very promptly and got to work quickly. He did an excellent job and explained what he was doing. We would have no hesitation in recommending ASL Services.” Customer, Surrey
“Very efficient to book them to sort out a sewer drain blockage, and the cost was exactly what they quoted. Called before they arrived with a clear ETA. Got on with the job and sorted it out within the hour. Darren was excellent – very courteous and helpful, did more than we expected to help sort the problem out and was a font of knowledge on all things sewer-related. Given the subject matter (eeew) the whole experience with ASL was an absolute pleasure.” Customer, Surrey
“ASL recently carried out a drain repair at our house. They responded quickly to the call for help, came out and soon diagnosed the problem – tree roots blocking the drain. The remedial work on site was carried out by Lester and George – they worked hard and were very thorough. This is a long-established company that seems to know what they are doing.” Customer, Surrey
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.

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Contact Us
Get in touch today
You can call us on 0800 181 684, email info@asllimited.co.uk or use the form below:
