Celvac are the UK water industry's confined space waste removal specialists
Serving Water (clean & sewage), Petro-chemical, Construction, Manufacturing & Food Industries throughout the UK.
Highly Skilled
Celvac is proud of its professional and highly skilled team and its ability to provide innovative, safe, efficient and cost-effective solutions for all aspects of specialist industrial cleaning and waste management.
Industry Leading
Using our in-house designed and built hyper-vac technology, we are the market leader in the recovery and disposal of inert, solid and liquid waste materials from confined spaces and difficult and restricted areas.
Our Services
Digester Cleaning
Celvac carries out Digester de-gritting and cleaning operations for many of the UK’s leading Water Companies and Tier 1 main contractors, including:
- Grit removal solutions
- AD & Wastewater treatment digesters
- ATEX/DSEAR compliant screening unit
- Principal Contractor Duties
Filter Refurbishment
Utilising specialist equipment including our media waste transfer system, we carry out various media removal operations, including:
- Rapid gravity filter refurbishment
- Specialised sand transfer and placement
- Biofor media recovery and placement
- Carbon and Bark filter refurbishment
Pumping Station Cleaning
Celvac’s highly trained confined space operatives can deal with any type, size and depth of wet well, classified to NC1, NC2, NC3 and NC4 categories, including:
- Wet wells up to 40m deep
- Dry wells and NRV Chambers
- Combined Sewer Overflows
Tank Cleaning
Celvac’s highly trained confined space entry teams carry out the removal of waste material from any size and type of tanks and channels, including:
- Digestion and sludge holding tanks,
- SBRs and Aeration lanes,
- Primary and Final settlement tanks
- Pathogen Kill Tanks
Tankering Services
Our tanker fleet is suitable for all types of bulk liquid effluent and sludge waste removal and consists of vacuum tankers that range in capacity from 3000 to 6000 gallons. We have experience in all aspects of tankering, including:
- Flooding and pollution prevention
- Removal and disposal of leachate & food waste
- Intersite tankering & peak lopping provision
- Hazardous and non-hazardous liquid waste
Dewatering & Grit Separation
Our in-house technology provides clients with waste recovery systems, separation solutions and screening options that all assist in reducing carbon footprint. Our systems have been applied to:
- AD and Wastewater Digester Cleans
- Reservoir and Lagoon emptying
- Zebra mussel removal
- Sand filter bed removal
Confined Space Entry & Rescue Provision
Our experienced and trained entry teams regularly access all types of confined spaces, of varying depth and size, to clean and remove waste from:
- wet wells & pumping stations,
- digesters, storm tanks, aeration lanes
- industrial vessels
- culverts, channels and chambers.
Bespoke Design & Fabrication
Our in-house Research, Design and Build team fabricate specialist vacuum recovery systems for almost every type of operation, environment and terrain. As well as building them to service the delivery of clients’ contracts, we also design and build to export.
Plant Shutdown
Celvac offers a wide range of industrial plant shutdown, outage and turnaround services, including the following:
- On site confined space and rescue services
- Media removal and disposal from all types of vessels
- Cleaning of reactors, filters, boilers, drums, screens
- Jetting and CCTV inspection
Culvert and Reservoir Cleaning
Celvac’s services support statutory bodies and contractors in the removal of debris, gravel and silt build up from within the UK water infrastructure. These services include:
- Cleaning of riverbeds, culverts and channels
- Cleaning of Lagoons, reed beds and reservoirs
- Cleaning of Highway structures, storm overflows and drainage systems
- Vegetation, wood and reed removal and disposal
Cesspit Emptying
At Celvac, we offer a comprehensive cesspit emptying service. Cesspits are waterproof underground tanks that store wastewater from businesses and homes that are not connected to the sewer mains. cesspit emptying needs to be done more frequently than septic tanks and it can only be done by a registered waste company like Celvac.
CCTV Drain Survey
Drains are an important part of a building as they help water and wastewater to be channelled away from your property. At Celvac, we offer a service where we will inspect your drains and conduct a survey using CCTV to identify potential issues. Our CCTV analysis will help to identify if the issue is a blockage, fault or something else causing the drains to not function correctly. Routine inspection of drainage systems is important as potential issues can be caught early on, avoiding costly repairs and potential property damage.
Smart Solutions
We offer turnkey solutions for the cleaning of digesters, sludge holding tanks, pumping stations and works, aeration lanes, channels, chambers, vessels, riverbeds and culverts.
About us
Established in 1993, our expertise have grown in the field of confined space cleaning and media removal and we can offer solutions to the most challenging of problems.
At the core of Celvac is a team of experienced and highly competent confined space personnel who are supported by a large fleet of specialist in-house designed and fabricated plant and equipment.
Our teams have the capability and knowledge to succeed in the most demanding of environments and deal with the most complex of tasks safely.
We actively encourage innovative thinking and collaborative working practices in our organisation to ensure we build long-term successful relationships with our clients.
By driving this culture it means that our teams can respond efficiently and are prepared to deal with any problem in a logical and methodical approach, ensuring the client gets a superior service.
About us
Established in 1993, our expertise have grown in the field of confined space cleaning and media removal and we can offer solutions to the most challenging of problems.
At the core of Celvac is a team of experienced and highly competent confined space personnel who are supported by a large fleet of specialist in-house designed and fabricated plant and equipment.
Our teams have the capability and knowledge to succeed in the most demanding of environments and deal with the most complex of tasks safely.
We actively encourage innovative thinking and collaborative working practices in our organisation to ensure we build long-term successful relationships with our clients.
By driving this culture it means that our teams can respond efficiently and are prepared to deal with any problem in a logical and methodical approach, ensuring the client gets a superior service.
Latest News
Giving Back in 2025 – Our Community Support This Year
At Celvac Environmental, supporting our local community is something we take seriously. As a business rooted in West Wales, we believe it’s important to give back to the towns, clubs, and organisations that support us throughout the year.
Over the past 12 months, we’ve been proud to support a wide range of local sports clubs, schools, charities, and fundraising events. Below is a snapshot of some of the community sponsorship and support we’ve been involved in this year.
Heath & Safety Day at Swansea.Com Stadium
Company Safety Stand Down Day!
On Friday 4th July, we held a company-wide Safety Stand Down Day at the Swansea.com Stadium — a fantastic opportunity to hit pause and focus on what really matters: the health, safety, and wellbeing of our team.
Digester Deep Clean – 800+ Tonnes Removed for UK Food Industry Client
Our custom-built hyper-vac units offer a wide range of suction capabilities that can remove all sewerage derived litter in an efficient and effective manner and can access assets in some of the remotest and restricted locations.
Emergency DAF lane clean, removing 50 tonnes of silt that consisted of bone materials emulsified to 3mm
Emergency DAF lane clean, removing 50 tonnes of silt that consisted of bone materials
Tenby Harbour Pumping Station
Picturesque Tenby Harbour sits in a central position in the beautiful Georgian town of Tenby, often known as “The Jewel in Pembrokeshire’s crown”. Tenby has grown to become Pembrokeshire’s most popular tourist destination and the population can easily quadruple during the summer season with all its visitors. This brings its own challenges on the sewage infrastructure and so we were tasked to carry out confined space entry to clean the pumping station that supports the harbour’s visitors, fishing and boating
Safety Training & Development
Celvac colleagues recently participated in the South Wales Safety Alliance Annual Conference. Topics discussed were how to maintain a culture of employee engagement, continuously improve and successfully manage change whilst never forgetting the fundamentals of safe working practices. Titled “Protecting People and Places – 50 years after the Health and Safety at Work Act 1974”, it was fascinating to learn the reasons around the introduction of the legislation whilst remembering some of the horrific safety incidents that led to many
Trustee Directors at Celvac
Being an employee owned business means that the decisions made by our senior leadership team need to be in the best interests of Celvac’s workforce, clients and the wider community. Sustainability is an over-riding objective and every quarter the Operating Board of Celvac reports to its Trust Board, presenting an update on recent performance and the achievement of company goals.
New Addition to the Celvac Fleet
Our custom-built hyper-vac units offer a wide range of suction capabilities that can remove all sewerage derived litter in an efficient and effective manner and can access assets in some of the remotest and restricted locations.
Celebrating One Year of Employee Ownership!
This week marks a significant milestone for all the team at Celvac – it’s been a fantastic journey of teamwork, dedication, and shared success as we celebrate ONE YEAR of being employee-owned!
Careers at Celvac
To apply for a job with Celvac Ltd, please send a cover letter together with your C.V. to: info@celvac.co.uk