Harlequin HydroClear 12 Person Sewage Treatment Plant


Product Ref: HC12

Customer Offloading MDPE Below Ground, Sewage Below Ground, Sewage
  • Volume: 5950ltr
  • Dimensions: L:4500mm W:1400mm H:2635mm
  • Estimated Lead Time 2 - 3 Working Weeks

    Home Delivery

    UK mainland delivery from £99.00 ex VAT

    check delivery cost

    You may also need:
    Domestic Commissioning
    Domestic Commissioning
    from £149.00 ex VAT
    (£178.80 inc VAT)

    How it works

    The HydroClear benefits from a moving bed biological reactor, or MBBR, at its core. A new process in the package wastewater market, MBBR technology embraces the benefits of fixed film media processes without suffering their downfalls. Overgrowth of bacteria leading to ‘channelling’ is an issue with common process designs such as submerged aerated filters (SAF), rotating biological contactors (RBC) or trickling filter (TF) designs. Unlike conventional media beds, MBBR systems are self-cleaning and unable to become blocked through channelling. Media interactions produce a sloughing effect that removes excess bacteria, thus ensuring continuous re-growth, optimising overall reactor efficiency. The HydroClear system incorporates a three chamber design, i.e., primary settlement, aeration chamber and final settlement.

    Within the primary settlement chamber, large solids are removed by settlement and flotation. An accumulation forms at the base of the tank and is removed by desludging.
    The clarified water then passes to the biological reactor, where it is treated to remove the dissolved constituents. Mobile media elements support large bacterial populations within the reaction chamber, while induced air promotes complete mixing, ensuring that full treatment is achieved. The treated effluent and sloughed off bacteria flows into the final settlement chamber, where any remaining small solids are removed prior to the clarified effluent being discharged from the plant.

    Product Description

    12 Person Harlequin HydroClear Sewage Treatment Plant

    The Hydroclear has been tested to EN 12566-3 and has a CE marking

    Harlequin HydroClear range of waste water treatment systems, represents significant progress for the domestic wastewater industry. Contemporary design engineering and analysis software and state-of-the-art manufacturing facilities combine to create this unique product which dominates the sewage treatment plant market with a class-leading pollutant removal level of 97%.

    Lower operating costs:

    With its unprecedented 24-month service period and enhanced capacities, the HydroClear can dramatically reduce long term operating costs. This is achieved through the inherent reliability of the simple but effective design, rather than using complex systems that require frequent maintenance and desludging to achieve optimum performance.

    Easy installation:

    Further benefits are realised from the outset with optimised design characteristics meaning the 6-pop model can be installed using a 2.5-tonne mini-digger rather than the 7 or 12-tonne machines required for traditional plants. These design values are reflected across the entire HydroClear range, resulting in simple, cost-effective installation with minimal damage to the surrounding area.

    Power failure default:

    Even if the power fails, the HydroClear will continue performing as a septic tank to ensure continued environmental protection.

    Silence is golden:

    High performance diaphragm blowers are used across the full range of HydroClears providing virtually silent operation.

    Odour minimisation:

    Hermetically sealed, and market leading performance means the HydroClear effectively combats odour production.

    6-50-pop options:

    The HydroClear is available in 6, 12, 20, 30, 40 and 50-population models, in single or multiple tank designs, depending on size, offering a highly flexible solution to space-limited sites. With a pollutant removal level of 97%



    Deliveries will be made by articulated lorry, and it is the customer's responsibility to ensure safe and adequate access plus off loading. Off loading of heavy items should be made by fork lift or similar heavy lifting equipment.
    If there is any doubt about delivery access or off loading, please contact us to discuss the options available.

    Product Details

    • Product Code: HQ
    • Customer Offloading: Customer Offloading
    • Material: MDPE
    • Tank Use: Below Ground, Sewage


    Locating your sewage treatment plant - Sewage treatment plant for a single household should be sited 15 m from the house. Approval and agreement should be sought from your local authority as early as possible.
    Although the HydroClear is virtually odour-free, please also consider the prevailing wind direction when choosing your site. Installations serving more than one building should be located at least 25 m from habitable buildings. Some local authorities may allow HydroClears to be installed somewhat closer, but this needs to be checked and approved locally. Don’t situate your treatment plant close to a driveway, roadway or anywhere else that presents a risk of superimposed loads and remember - good access must be available for the tanker to empty your plant.

    Site levels:

    Be sure to survey the site and check levels and the fall on the drain carefully. The Balmoral HydroClear is designed to cater for a drain invert depth of 1 m, but this can be reduced to 750 mm or increased using a Balmoral-supplied extension to suit specific site requirements.


    Our shipping costs cover most of the UK - however, parts of England, Scottish Highlands and Islands including areas north of the Glasgow / Edinburgh border, Isle of Wight, Channel Islands, Isle of Man, Anglesey, Western Isles, Shetland Islands, Orkney Islands, Isles of Scilly, Northern Ireland and the Republic of Ireland may cost more.

    Please call before ordering if the delivery postcode is listed below. There may be additional shipping costs. AB, BT, CA, CT, DD, DG, EH, FK, G, GY, IM, IV, JE, KA, KW, KY, LD, LL, ML, PA, PH, PO 30-41 (Isle of Wight), SA, SY, TD, TN, TR, ZE Southern Ireland

    Our lead times should only be used as a guide and are subject to change.


    Unless a hi-ab delivery has been booked at additional cost, it is the customer's responsibility to offload with suitable equipment on the day of delivery and a failed delivery may result in additional charges.

    We recommend installers and/or plant hire & materials to install such as excavators, aggregates etc are not booked until you are in receipt of the goods. Tanks Direct cannot be held responsible for costs incurred due to unforeseen delays, please see our terms for more details.


    HIAB delivery will be required if you need the tank offloaded from the delivery vehicle. The driver will unload the tank from the vehicle to ground level, however this service is not to place the tank in situ, this will need to be arranged separately.

    If you have any questions regarding your delivery, please contact the Sales Team on 01643 703358.

    Returns Information

    Please note - Certain items may not be returnable, for example those made to order or for sanitary reasons. Please check the product page for more information.

    Customers may return items within 14 calendar days (as per our Terms & Conditions) - refer to section 7. **

    All Items must be returned unused, refunds cannot be issued for used or previously installed items.

    Please be aware that returning a tank can be complicated and expensive, so please check that you are ordering the correct item (we suggest checking the dimensions very carefully).

    If you wish to return goods, please complete the form on this page to provide further information.

    Once your request is approved, a valid Returns Authorisation Number (RAN) will be issued to initiate the returns process along with information on how & where to return your order along with any costs involved.

    Please DO NOT return any goods without this authorisation. Goods cannot be accepted without this.

    Returns are not accepted at our Minehead Office, please wait until we contact you before returning any goods.

    View Tanks Direct's return policy now.

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