Harlequin CAP6 Sewage Treatment Plant


Product Ref: CAP6

MDPE Below Ground, Sewage Below Ground, Sewage
  • Volume: 2400ltr
  • Weight: 275.000kg
  • Dimensions: L:1660mm W:1600mm H:2180mm
  • Diameter: 1680mm
  • Estimated Lead time 5-10 working days

    Home Delivery

    UK mainland delivery from £155.00 ex VAT

    check delivery cost

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

    Product Description

    Harlequin CAP6 Sewage Treatment Plant For up to 6 People

    Harlequin CAP6 is a compact sewage treatment plant designed specifically for domestic installations for up to 6 inhabitants (equivalent of up to a 4-bedroom house). It is a Continuous Aeration Plant which operates using a unique bio-media system and delivers a pollutant removal level of 96.2% whilst also combating common problems associated with small packaged domestic plants such as media blockage and inadequate oxygen supply.

    The Harlequin continuous aeration plant range is available in 6 / 9 / 12 Person options. 

    Bio Media System

    Similar to the BBR system, there is no fixed media, eliminating blockages that are commonly found in smaller treatment plants.

    Durable and Stable Product

    Made from tough, durable polyethylene, it is easy to transport and has a wide base for stability.

    Saves Money

    With an easy installation due to the system's compact size and light weight, it also promotes low maintenance, reducing costs.

    Easy Maintenance

    The only component that requires maintenance is the compressor. This is located in a separate chamber within the lid that allows access to the compressor without coming in to contact with any sewage.

    Compact System

    A perfect compact solution for homes of up to 6 inhabitants (4 bedrooms)

    Low Noise

    With a near silent air compressor housed beneath the flat lid, the operation of the system is virtually silent.

    CAP6 Features

    • UK Manufactured in High quality MDPE
    • Suitable for homes with up to 6 people
    • Pollutant removal of 96%
    • Strong and Compact
    • Odourless
    • Simple Installation


    Shipping: *Deliveries will be made by 44" articulated lorry, and it is the customer's responsibility to ensure safe, adequate access, turning space and provide their own off loading facilities. 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
    • Diameter: 1680mm
    • Material: MDPE
    • Tank Use: Below Ground, Sewage


    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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