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About ASL Limited's 'How' and what makes us different

ASL Limited carries out all drainage work itself, from simply fixing a blocked drain right up to carrying out private system tank installations and main drain (sewer) connections.

We realise that we are still learning and always welcome feedback from our customers to improve our service. We have been proud members of Check-a-trade since 2000. We have numerous reviews testifying to our hard work in providing the best drainage services in the region and encouraging all our customers to give honest feedback.

Our personnel are aware that whatever work we are carrying out, the customer should have the minimum inconvenience. Our clients want minimal disruption and an easy, frictionless experience. People are much more understanding of the challenges that may arise on a job if their experience, on the whole, is one of excellent work, which is our goal. ASL Limited does not start a job and run to another before it has completed the first one. We are willing to deploy extra resources and personnel to give our team support, delivering materials smoothly and efficiently so that we can relieve our customers of cluttered driveways, etc., leaving them with the feeling of having had a fantastic experience of how the work has been carried out.

If you like our 'How', you can read about our 'Why' in our blog article entitled 'About ASL Limited's 'Why".

Call 0800 181 684 to chat about how we can make your waste systems less draining!

ASL Limited has four major departments.

In the commercial, private, and public sectors.

Blocked drains clearance.

ASL Limited provide emergency drain unblocking services as well as cleaning, repairs and CCTV surveys

Including repairs and no-dig repairs or lining, maintenance, cleaning, and emergency unblocking services. High pressure jetting, rodding, and CCTV surveys with or without recordings.

Private sewer systems.

ASL Limited empty, install, maintain and upgrade cesspits, septic tanks and sewage treatment plants

Supply, installation, conversions, maintenance, scheduled & emergency emptying of cesspits, septic tanks, & treatment plants. Pre-installation & house purchase drainage surveys.

Pumps & pumping mains.

ASL fit, repair and clean pumps of all kinds as well as and installing pumping mains

Supply, replacement, installation, and maintenance of pumps, pumping stations, pumping mains, control panels, and alarm systems. Including annual servicing and repairs.

Main drain connections.

ASL Limited are fully authorised to connect to the main drains and can do this for private and commercial clients

Supplying & installing a domestic sewer line, included in the connection to the public sewer. Pre-installation surveys. ASL Limited is licensed to work on public roads and footpaths.

This is a photo of our Gerry in action attending a septic tank empty job

I often state and I truly believe that I’m a student rather than the finished article – I have lots to learn and I’m open to change. In similar words, I have shared and impressed upon all our teams the following values. These values and principles are actions for productivity giving us a great way to ‘become’, to feel and be secure, enabling us to be forgiving and understanding to be stronger and to live happier, dealing with the ups and downs of what life throws at us.

Gerry Rowe – Owner of ASL Limited

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.

Why choose ASL Limited for all my drainage needs?

ASL Limited, as a drainage company, is well-established in the industry. It has motivated and innovative people at its heart, creating solutions to help our clients and customers. You may think it is difficult to get motivated about dealing with drains; however, it is quite an exciting experience when we develop a solution to our clients' problems, which seemed impossible to solve. All four of our departments above are headed up by fully trained, qualified managers. All our engineers are also fully trained and qualified in their particular fields, within different but inter-linked departments of our company. All our staff has a basic knowledge of all the areas that we work in, e.g. a blocked drains operative will have an overview and experience of private sewage systems, and how they work, because they communicate and work together across departments regularly to assist one another. We will always send the specialist in the particular department to come to our customers’ aid, but he may well pull in other staff members to assist with associated work.

What makes your staff different?

The best examples of this are our ‘blocked drain engineers’. When they help with the installation of septic tanks and treatment plants, you can imagine they gain a lot of experience to help our customers. When one of our engineers responds to unblock a customer’s drain, he can call on his basic knowledge gained while working on main public sewers and private sewage systems.  He can recognise and advise the customer when: it’s not a blocked drain, but in fact, their pumping station has broken down; or their treatment plant is not discharging properly because of a pump malfunction, or the main public sewer is blocked. He also knows just who to call to solve the problem, whether it is the local authorities or an appropriate colleague within a department of ASL Limited.

Another example is when one of our ‘blocked drain engineers’ comes across a septic tank with a small pump after it or a treatment plant with electrical working parts – he has enough knowledge to recognise the problem. He is well aware that he is not an electrician and he is not allowed to touch the electric system, but again he has got the right ASL Limited electrical engineer on speed dial and knows him personally. He also understands if the ASL Limited tanker is needed to suck the sewage out of the drains and out of the private sewage system with his basic experience.

I think you get the idea – all of our experts in the company, in all departments, have a basic understanding of what is required in each other’s departments, are familiar with and can immediately call on the right professional best suited to that particular job.

Do you have the right equipment?

Because ASL Limited is a small to medium-sized company, we cannot only carry out a simple blocked drain job, but we can also take on contracts for £10,000 to £100,000. One of the benefits of having four specialist departments means we are equipped for a full range of drainage services. For example, we have several different jetting machines with unique abilities, pressures, and flows suitable for various tasks instead of ‘one fits all’. This is also true of our vehicles, tools, and equipment, enabling us to send the right combination for every sized application. 

Our dedicated team delivers thousands of solutions for new customers per year, leading to long-term maintenance packages and forming solid working relationships with happy customers. In the office, we work tirelessly throughout going the extra mile, tailoring our services to you – our client – creating a natural desire to return and share your positive experience of our company, which results in the strengthening of our brand.

What are your brand values at ASL

Our core brand values aim to ensure all of our jobs leave a lasting impression for all the right reasons. Our approach is to listen to your requirements; deliver our service on time; within agreed budgets; and to a standard that will exceed your expectations.

We believe that for our personnel to invest their passion and dedication in our company, we need to invest in them. ASL creates opportunities and experiences through communicated plans. We stay connected with our teams through regular catch-ups, engage our people in change, create incentives for performance and reward results with recognition schemes, company fun days and team building days.

  1. Customer service: We will love the way customers treat us when we are friendly, knowledgeable and quick to respond. We are there to take care of our customer’s challenges, and in turn, they will take care of us with mutual respect and by doing business with us over and over again.
  2. Our culture: Is the kind of organization we want to be. After all, you love your jobs; our values are congruent with our customers; to do an excellent job, tell the truth and manage realistic expectations.
  3. Our Cause: We believe in what they believe in, we can meet what they expect from us, through our training and our motivational meetings every morning (before Covid).
  4. Trust: Trust each other. Carry out our work as per the estimate, but if adjustments are required, make sure the customer is well informed and part of that decision. If customers find it difficult to trust our organization, they may not ask us to do business with them again in the future.
  5. Reputation: Is the result of our training and feedback. Mistakes are not the ruination of our reputation, but how we handle them could be. We must learn from our mistakes and make sure we don’t make the same ones repeatedly. This protects our reputation, and this mindset is a big influence on the decisions we make.
  6. Consistency: Cement our reputation. Are we always early to arrive on the job, or are we always late? Are we always finished on time, or are we always over time? How do we want our customers to use the word ‘always’ to describe their experience of us? For example: “ASL are always friendly and knowledgeable”, “ASL always helps me to make an informed decision” or “they are always so helpful”.
  7. The How: The way we do business: This is about our process, policies, the hours we are truthfully open, our location, being clear and transparent and more. It is really about our operation. The clarity, truth and consistency will get a customer in the door and combining this with our principles and brand values will bring them back year after year.
  8. The Why: As with Simon Sinek’s quotes and speeches. My understanding of all of these values above (and more) may contribute to why a customer chooses our company over another. When we figure out a customer’s “Why” we strive to meet our customers' goals and needs, we will most certainly connect and bring customers back, again and again; giving us the security and opportunities to grow; resilience takes practice. 


Need help with drainage?

contact ASL to help you with your drainage
Send us the detials below and we'll get you booked in right away.

Do you have a private sewage system?
(eg. a cesspit, septic tank or treatment plant)
Are you happy for us to contact you with information in the future?

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.

We have an amazing amount of wonderful reviews on Checkatrade but would really love to boost our reviews on Google.

If you have a moment to leave us your feedback, please visit our Google Business page and

leave us a review.