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We are very proud to be members of Checkatrade and are even prouder of the reviews that we have received. We take pride in our work and as a family-run business, we stay on top of our customer service and standards of delivery. If you are looking for advice or have a question about a drainage issue just give us a call and we’ll be happy to help.

With over 25 years of experience in the industry and unblocking drains – we totally understand how mind-boggling it can be so we have created a blog full of information articles and 'how tos' to help you understand how your drainage works. Of course, you can always give us a call on 0800 181 684 to simply ask us to resolve the issue for you.

ASL Limited is a medium-size, family-run, drainage company divided into four departments; headed by specialist managers. ASL managers are fully trained experts in their particular field. As a family-run business, you can imagine each department liaising with the other to gain experience and understanding that benefits our customers in a very prudent way, whatever their drainage needs.

Benefits of using ASL Limited.

To unblock your outside drain, sink, toilet or shower drain, or even if you have a problem with your septic tank treatment plant or pumping station, ASL Limited are fully experienced and equipped to provide the best solution for you.

Whoever you call to unblock your drain, you will find that about 70% of callouts are straight forward, unblocked within the first half-hour. When the blocked drains operative comes across a private sewage system with a pumping station or a cesspit/cesspool, they may not have the knowledge that our team has to diagnose the real problem. This can be difficult, especially if the drains are full and cause further problems.

If the blocked drain person you call has no idea about treatment plants or septic tanks, their ability to solve a problem is limited. They may not have enough knowledge to tell if the system is working or not. 

ASL blocked drains operatives have a lot of experience working with our different departments. This gives them a basic knowledge of a pumping station's workings and how it works. Our operatives know the electrics need to be handled by our qualified electricians. With electricians, managers, expert engineers and consultants from any department on speed dial, it is not a problem. They can ask for their advice after explaining each particular job's problem – or emergency call out. This gives our customers efficient long-term solutions to any drainage issues.

ASL Limited blocked drains experts and drainage tanker in attendance. 

If a sewage tank needs to be emptied, our blocked drains operative can talk to our tanker driver (the emergency tanker driver if needed). They know the tanker driver is reliable and know each other personally because they are part of ASL Limited. Both are also familiar with the workings and the possibilities of the tanker.

Whether you have a private sewage system or not, we can unblock your drain, find the cause and repair the problem too.


Don’t delay we can help you today!

Call 0800 181 684 for all your drainage needs.

Our HQ is based in Guildford, but we cover the whole of Surrey, Parts of Berkshire, Hampshire, West Sussex and South West London.

See the map on our 'areas covered page' for our services reach and use our postcode checker.

ASL Limited clears the majority of blocked drains within half an hour.

ASL Limited Certifications

Our engineers have a variety of certifications, as follows:-

  • New Roads & Street Works
  • EUSR Water Hygiene
  • CSCS
  • NPORS Excavator & Dumper
  • Confined Space

We are also Safecontractor approved, as well as being part of Which Trusted Traders and Check-A-Trade.