Allerton off mains drainage specialists UK

Sewage. Sorted.

Specialists in Sewage Treatment Systems, Pump Stations, and Septic Tank Conversions

Allerton are the premier off-mains drainage company covering sales, servicing, commissioning and repairs of all types of sewage systems.

Drainage Problems? We can help!

The separation and treatment of our waste is one of the most important advancements in human history and today our techniques are quite sophisticated. At Allerton, we install and service many sewage treatment systems and are equipped to handle systems manufactured from any company. Whether you want to make a house purchase or sale and need to make the sewage system compliant with the Binding Rules from 2020, or you simply have a clogged drain, we are here for you. We also give free advice in person or over the phone. If you are off-mains, we can solve all of your drainage problems, big or small.

We offer a free site visit within our service area, so contact us today!

What are our customers saying?

"Cannot praise Allerton enough, particularly Aaron who was our main point of contact. Needed to get a septic tank inspection done quickly so as not to hold up a house purchase. Aaron juggled the diary and fitted us in. Clear and concise report with exactly the info we needed to keep the solicitors happy! And well priced compared to other companies we had phoned. Engineer who attended also spotted a small build up and cleared it on the spot with no extra charge. Excellent customer service. Thanks to everyone!"
Gary Minns
5-Star Google Review

We are one of the most highly reviewed UK company in off-mains drainage. Read more testimonials on our reviews page!

Allerton Servicing Engineer Working on Pump Station

Servicing and Maintenance

We are experts in servicing and maintenance, and we service any off-mains sewage treatment system.

Find the option that is most relevant to you in the menu below.

Contact us and we will be happy to make a site visit free of charge. Or you can simply discuss issues with any of our knowledgeable staff in the office.

Products We Service

What We Do

Sewage Treatment
The Diamond Range

We have sewage treatment options to suit any size property. The Diamond 6 is our most popular treatment plant for the average household.

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Drain Unclogging
Do you have a blocked drain?
No job is too big or too small. We carry all the tools necessary on a job so we can fix your problem right away. We are experts in drainage and here to help.

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Check Groundwater Levels
The Allerton Ground Water Tube (AGWT)

The ideal solution for measuring your soakaway (drainage field) water levels. Buy yours today!

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Broken sewage treatment plant uprooted from the ground by heavy rain - UK weather and Local Flooding
General Binding Rules
Are you compliant with the General Binding Rules from 2020?

On a budget but need to comply with the binding rules? A septic tank conversion is a budget-friendly way to upgrade your system without installing a new sewage treatment system.

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About Allerton

History of Allerton

In 2024, we’re celebrating 50 years in drainage.  Starting out as Allerton Contracting Co Ltd in 1974 and later became Allerton Bradley Ltd in 2019.  Read all about our company on our About Allerton page.

Our experience in land drainage has paved the way for us to develop sophisticated new techniques and systems for sewage treatment through the years. Customer experience is at the heart of everything we do.

We are experts in installations, servicing, and maintenance for sewage treatment plant, pump stations and septic tank conversions.

Meet the Team

Areas We Service