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Underground interceptor and oil separator services

Andel provides a range of customer-focused services to avoid the costly consequences of pollution from surface water drainage. With many years of experience in this specialised field, Andel has become a recognised market-leader in interceptor maintenance, including the servicing of underground interceptor waste tanks, oil separators and surface water drainage systems.

Pollution poses a significant legal, environmental and financial risk to any company or organisation with a hard standing area.

Environment Agency guidelines state that any areas that catch rainfall and have significant vehicle traffic or fuelling facilities must have an oil separator installed to avoid surface water drainage polluting the environment. Andel provides regular inspections, service and support to numerous organisations throughout the UK with underground interceptors and oil separators.

Interceptors are essential for protecting the environment and preventing pollution from fuel and oil and its costly consequences. It is also essential that interceptor tanks are installed correctly and are regularly serviced and maintained. Andel can inspect, service, empty, install and supply all types of oil separators and petrol interceptors as well as supply alarm systems and spill control products.

Typical Andel activities on an interceptor waste and drainage site visit

Andel protects the environment from the risk of pollution by maintaining your interceptors and surface water drainage systems, keeping you compliant with regulations at all times, wherever you are in the UK. The illustration below shows a range of site activities undertaken on a typical site visit and inspection. You can use your mouse to hover over any number to see a description of the activity (or touch on a touchscreen device).

Typical Andel site activities include drain condition surveys using state-of-the-art CCTV camera-mounted robots and industry-leading Wincan reporting software. Our fully-trained operatives repair and unblock damaged drains and gullies including tree root cutting and removal. Interceptors are regularly inspected and maintained and only emptied when required by de-watering tankers which only take away contaminants and not grey water which means cost savings for customers and reduced environmental impact.

Interceptor maintenance and drainage inspections


Andel provides regular inspections, service and support to many customers with underground interceptors and oil separators. Andel will ensure a full service is carried out and most importantly that filters are changed and alarm systems calibrated. All Andel products and services are fully compliant with Environment Agency guidelines. We inspect and certify, we carry out full drainage trace surveys and mapping (as required by the emergency services) as well as drain condition surveys using state-of-the-art robot-mounted CCTV cameras and Wincan industry-leading reporting software.

All our engineers are fully qualified and trained in confined space entry procedures with escape sets, breathing apparatus and rescue techniques and carry out their work to the highest standards, including interceptor installation, emptying and filter changing.

Andel only use licensed disposal facilities, ensuring your duty of care obligations are met with waste transferred in accordance with Hazardous Waste Regulations 2005. Andel inspections coupled with the monitoring of interceptor alarm equipment, auto-closure devices and surface water drainage surveys will eliminate the risk of a pollution incident and will give early warning of any potential problems. Our team of fully-trained operatives will also carry out any remedial work needed, such as repairing and unblocking damaged drains and gullies including tree root cutting and removal.

Andel can inspect, service, empty, install, commission and supply all types of oil separators and petrol interceptors as well as supply alarm systems and spill control products.

Interceptor installation

Andel provides a comprehensive interceptor tank installation service. Andel's highly experienced teams can specify, supply, install and maintain all types of underground interceptor tanks in strict accordance with legal regulations, ensuring you remain compliant with appropriate legislation at all times, wherever you are.

For interceptors that have been installed by another operator, Andel can carry out a full inspection and check that all aspects of the installation have been undertaken correctly:

  • Ensuring the interceptor is watertight 
  • Inspection of the filter to ensure security and positioning is correct
  • Inspection of the alarm system and auto-closure devices 
  • Calibration of the oil layer thickness probe
  • Inspection of the chambers for any sign of silt.

Interceptor emptying and tankering service

Andel provides a highly cost-effective and friendly interceptor maintenance service, focusing on inspection first, avoiding where possible, the use of expensive tankers if not required – we tailor the service to suit the need. 

If an interceptor needs emptying, we use de-watering tankers that only take away contaminants and not grey water. Unlike many other operators, Andel’s tankers are equipped to extract the contents of the tank on site, separate the water from the oil, silt and any other impurities and return the grey water to the tank. 


Andel’s tanker emptying service reduces time, money and environmental impact: 


  • Because we are not carrying grey water around in our tankers, we are able to cover several sites in one day – offering a lower cost to customers 
  • Because we are refilling the interceptor with the filtered water from the tanker – we avoid the costly and time-inefficient exercise of refilling the interceptor tank from the mains water supply –  saving customers time and money as well as reducing environmental impact
  • Our mileage is reduced as we can avoid having to make repeat visits to waste disposal sites – reducing costs and reducing diesel emissions from our tankers

You can rest assured that with Andel you will have the products, expertise and services to maintain your interceptor waste tanks and drainage systems and keep you protected from the risk of environmental incidents and their costly consequences.

Get in touch now, call us 24/7 on +44 (0)1484 845 000 or use our enquiry form

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