Our Northamptonshire Sewage Treatment Services

Allerton are the premier off mains drainage company covering sales, servicing, commissioning and repairs of all types of septic tanks, sewage treatment plant, sewage pump stations and soakaways in Northamptonshire.

The Diamond 6 is our best seller, suitable for up to 6 people.

ConSept taken out and repaired in Daventry

Looking for Sewage Treatment Plant repair, installation, or maintenance in Northamptonshire?

If you’re not sure whether your system can be repaired or if you require an alternative system, let our experts guide you to a solution that works for you. Contact Allerton for help with your sewage treatment problems.

What are our customers saying?

"The engineer was a delight to have around whilst he fitted the ConSept. He was very happy to answer all questions and explain what he was doing, and he clearly wanted to do a great job. In short, he was very obliging and a great credit to Allertons. Well done Allerton for having secured such a good hire!"

Mrs Flavell

ConSept Installation in Grendon

We are one of the most highly reviewed UK company in off-mains drainage. Read our more than 65 positive reviews.

Need a solution to your Septic Tank Soakaway problems?

Our friendly and supportive staff will assist you every step of the way.

If your Septic Tank has failed, Allerton can:

Repair It

Add a Soakaway

Make a Septic Tank Conversion

Replace It

Need a Sewage Treatment Plant repair, installation, or maintenance in Northamptonshire?

Allerton will:

Save you money

Maintain your compliance with regulators

Help you protect the environment

Extend the life of your system

Delight you

Why Allerton?

Qualified

Allerton have 50 years of experience in drainage and sewage treatment. We also provide expert advice, much of which can be found on our blog or frequently asked questions page.

Value for Money

We offer a free initial on-site consultation for installations near Lincolnshire. We keep our customers in mind when it comes to pricing. We have saved our customers hundreds of pounds over the years by our considered overview. We can do the same for you! Speak to us for a quote!

Friendly

Allerton offers a unique level of service. We can help with sizing your treatment plant, installation advice and offer a full installation service.

Ready to arrange an appointment?

Contact our office to arrange a visit. Don’t hesitate to talk to us if you have any questions or concerns.

Google Reviews

Allerton - Sewage Treatment and Septic Tank Specialists

5.0

Based on 68 reviews

review us on

Carrie Armitage

05:11 28 Aug 24

Allerton's work installing a new domestic sewage treatment plant was first rate. From the initial visit and quote through to the installation everything was prompt, efficient, friendly and lived up to all promises and expectations. The installation team were great to work with, and despite some interesting old drainage issues when excavating the new location and decommissioning the old septic tank, they maintained their good humour and professionalism throughout. I can highly recommend their services. Thank you.

Lisa Davidson

05:27 23 Aug 24

Excellent system and the engineer (Dayton) who carried out our annual service recently is clearly very skilled, taking the time to explain things to us and ensuring the septic tank was working correctly, he also enjoys his job which is refreshing to see. The tank still doesn't need emptying after 3 years, very satisfied!

mark quigley

10:46 16 Aug 24

Excellent service, great communication and lovely people to deal with.I first wrote this review 3 years ago and they have consistently delivered excellent service since then. Very friendly and professional

Malcolm Harrington

16:36 02 Aug 24

The Allerton team were excellent. Their work was excellent and their great attitude a credit to them and Allerton.I recommend them highly.

Catherine Whitall

15:01 26 Jul 24

Many thanks to Allerton Bradley and especially Jason, Chris, James, Aaron and the team for a top rate service from start to finish. Had a new Diamond DMS3 water treatment plant installed to replace our old septic tank. Extremely professional installation, great communication throughout from the guys on site and the office, tidy, punctual and a fantastic end result. I would say I'm not the easiest to work for, have very high standards, know exactly the job i want done, do not employ many companies as prefer to carry out most jobs myself, however it was a pleasure having these guys on site. Would not hesitate to recommend. Oh and its great to be able to use the loo's etc whenever needed rather than going to the local garden center to use their facilities!!! Many Thanks, Graham & Catherine

Shelley Williams

07:14 01 May 24

Cannot recommend Allertons enough! Excellent service with speedy attendance by an engineer and the problem of a faulty timer was resolved without being too costly! Will definitely be saving their contact number on speed dial!

Paul Scott

15:20 22 Apr 24

We have used Allerton to maintain our household pump system for several years. Always found their staff pleasant and helpful. Last weekend a fault developed which we reported on the Monday morning. By Monday afternoon they had called, identified the fault, offered advice, made the repair and everything left tidy and all with a smile.

Cherie Pearson

16:12 16 Apr 24

Great service, good to receive email reminder when service is due!Very pleasant person arrived promptly to do the service.

harriette Bradley

15:44 01 Apr 24

Fantastic service from Allerton. Chris was brilliant! He was punctual, polite and professional. The finish was outstanding. We are so pleased with the result. Would definitely recommend Allerton and Chris. Thank you so much.

Nigel Sellers

10:40 12 Jan 24

Living close to one of Hampshire's best chalk stream rivers, having the right treatment plant that is compliant and meets with the EA's stringent regulations is a necessity. Our old cesspit did not meet with the latest regulations so when we looked into changing to a sewage treatment plant Allerton gave us the reassurance and expert knowledge that we needed. The treatment plant has been installed for over a year now and we have just had our annual service. The team at Allerton are all knowledgeable, professional, helpful and courteous when ever I have needed to contact them, nothing is too much trouble. I would recommend the company and specially if you live close to a river where specialist advice is needed when considering the options of changing from a septic tank arrangement to a compliant treatment plant.

David Le Sueur

14:17 11 Jan 24

Alerton is a reliable company that thrives on clear customer contact, providing us with a no nonsense practical service that is invaluable and most necessary.Allerton personnel are pleasant, informed and helpful. We have used the company for years and intend to stay with them.Thank you Allerton for your immaculate service.