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    Advanced sewage treatment plant

    Marsh Hydroil™ Forecourt separators

    For areas at ‘significant risk’ of oil contamination

    Designed and tested to BS EN858 parts 1&2, Marsh Hydroil forecourt oil separators are manufactured from virgin unfilled resin offering exceptional durability, impact resistance and are guaranteed to be watertight and of uniform thickness. These combined properties ensure that the full range of separators stand up to the most rigorous conditions during their service life.

    Internal working components, such as coalescing filters, weirs, oil skimmer plates, and their configurations offer the most modern and efficient oil/water separation capability available to the market today.

    A wide choice of inlet and outlet positions are available on the units – detailed requirements should be provided at time of order (standard inlet and outlet positions will otherwise be fitted.

    Typical applications

    • Petrol stations
    • Refuel facilities
    • Fuel storage sites

    Configuration and components are shown for illustration purposes only

    Operating principle

    Marsh Hydroil forecourt separators are manufactured to a specific size in order to retain the potential spillage from a single compartment of a road tanker – currently up to 7,600 litres in the UK.


    1. Inlet
    2. Oil level alarm (in 3” pipe)
    3. Coalescer
    4. Outlet
    5. Access turrets



    • Designed and tested to meet latest UK and European standards
    • Corrosion resistant
    • Tank shells guaranteed for 25 years with a design life of 50 years
    • Heavy duty shells enable installation in all ground conditions
    • Easy access turrets for maintenance and servicing (Turret guards optional)
    • Various alarm types available (Required by EN858-1)
    • Variable invert depths and inlet/outlet configurations ­­­to suit individual site conditions
    • Vented turrets dissipate excessive fumes and vapours


    Specifications table
    Model Capacity (litres) Width +/-50mm Length +/-50mm Height +/-50mm Connection size Inlet invert Outlet invert
    Class 1 10000 1800 4200 2200 160 700 800
    Class 2 10000 1800 4200 2200 160 700 800

    > The dimensions given on this page are for guidance only.
    > For precise tank sizes and configurations, please contact Marsh Industries.
    > Number of access shafts will be built to suit site specifications and to maintain safe access for emptying.
    > All dimensions in mm.
    > Due to production processes, dimensions of finished units are within a tolerance of +/-2.5%.


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