Our Story

Here at Suprafilt we’re experts in the design, manufacture and installation of aeration systems for the waste water treatment sector.

We offer a full turnkey solution, access to a unique product range and we’re the industry leaders for the installation of Nereda systems.

Our focus is on delivering projects efficiently, by staying at the forefront of technical advances, while taking down any barriers to getting the job done.

We’re driven, professional, flexible and approachable. We win and retain customers through reliably high service levels and the quality of our work.

Our People

Our people are the key to our success down the years. It’s our people who turn our promises into reality. They are the ones designing, making and installing our solutions. They are dedicated problem solvers and innovators.

We’re innovators – we come up with new designs and products to produce better, more efficient solutions;

We’re problem-solvers – our in-house capabilities allow us the flexibility to devise and produce solutions;

We’re reliable – we hit programme and work and have a safe working ethos.

Our Leadership Team

Graeme Fielden – Sales Director

Jonathon Lord – Contracts Director

Hannah Nolan – Operations Director

Our Values

Innovation: We have unique access to state-of-the-art products, allowing us to develop innovative solutions to meet our customer’s requirements for greater efficiency and value.

We enjoy partnership with universities, independent research institutions and the world’s leading technical and process scientists and experts to remain at the leading edge of technology in this field.

Environmental focus: We’re committed to delivering solutions that will have a positive effect on the environment through carbon reduction and energy saving.

Our OHSAS18001 health and safety management system complementing our long established ISO9001 QA and ISO14001 accreditations

Flexible: Our turnkey operation gives us control over every aspect of our projects — from in-house design and fabrication through to installation — meaning we’re reliable, approachable and flexible.

Knowledge: We have a track record of successful and safe delivery over many years. Customers are confident that they are always in the hands of a professional and knowledgeable team.

Our History

Founded in 1995, Suprafilt Coates was initially a joint venture between German company Suprafilt Gmbh and Coates Engineering. The company quickly gained a reputation-winning work, with the likes of Welsh Water Anglian Water, South West Water and Scottish Water.

A move to Rochdale and a new fabrication partner soon followed. This allowed us to secure progressively larger and more complex projects, including the UK’s largest liftable grid aeration system for Anglian Water.

In 2001, after a management buyout, Suprafilt severed all links with our original German partners and two years later we secured our first overseas project in Sharjah in the UAE.

Over the years we’ve always looked to bring advanced thinking to the industry. We were the first to the UK market with an innovative fine bubble diffuser from US-based SSI. Indeed within a few years we ensured that more SSI diffusers were sold in the UK than in the US.

In 2011 we also established our own installation team, allowing us to take full control of projects from cradle to grave.

Suprafilt moved to Whitewell Bottom, Rossendale, in February 2016 after almost 20 years in Rochdale. Our existing premises are three times the size and allow us to discharge even larger projects. Now a well-established name, working with water companies and leaders in other industries, we regularly deliver multi-million contracts.


We have introduced a ‘lasting legacy’ programme, with a commitment to leave a positive lasting legacy at the sites we have worked on for the local community.

We started the programme by becoming involved in creating a community garden in Failsworth where Suprafilt will provide a water feature. Our legacy programme may also include volunteering hours, physical donations or employing local people for roles such as labourers and plant hire drivers.

Staff Wellbeing

We truly believe that a happy and healthy workforce is a productive workforce. We believe this approach also enables employees to think clearer and helps to reduce unnecessary stress.

Here at Suprafilt, we hold a 5-a-side football match between employees every month, we host mindfulness sessions, we buy cakes to celebrate contract wins and we are continually developing our company social ethos.


Suprafilt have a long-standing relationship with University of Sheffield on the development of micro bubble diffusers with fluidic oscillators. We pride ourself in remaining at the forefront of the aeration industry. Sheffield University have collaborated with Suprafilt to prove the science of aeration and its application.