6 Person Matrix Sewage Treatment System, Gravity


Product Ref: CLF1

Customer Offloading Free Delivery Below Ground, Sewage Below Ground, Sewage
  • Dimensions: H:1956mm
  • Lid Size: 900
  • Diameter: 1500mm
  • Estimated Lead time 4-5 Working Weeks

    Home Delivery

    UK mainland delivery from FREE ex VAT

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    Product Description

    Sewage Treatment System Matrix 6 Person Gravity *(Free Site Survey Subject to Site Location)

    MATRIX sewage treatment systems are designed to optimise process efficiency, minimise running and maintenance costs, and to be as simple and cost-effective as possible to install. Matrix systems are available as a standard single structure 'unitank' design up to residential population equivalents of 300 and thereafter larger systems become a modular design. 

    The MATRIX sewage treatment system is designed to achieve the minimum required effluent quality standard of 20 mg/litre Biochemical Oxygen Demand (BOD) : 30 mg/litre Suspended Solids (SS) : 20 mg/litre Ammoniacal Nitrogen (NH4), which in European Standard performance testing relates to an efficiency of better than 94%.

    The certified performance of the MATRIX system is that it produces an average final effluent quality of 11 mg/litre Biochemical Oxygen Demand (BOD) : 16 mg/litre Suspended Solids (SS) and 7 mg/litre Ammoniacal Nitrogen. This relates to an average efficiency ratio of 96.2%, better than most other manufacturers, with individual test efficiency results being as high as 98.8%. As part of the test procedure, the MATRIX system was proven to have one of the lowest operating costs.

    All Matrix treatment plants have a standard inlet invert depth. Integral pumped discharges can also be provided with all units, eliminating the need for additional tankage and installation costs. All Matrix systems are complete with failure alarms as standard (as required by BSEN12566-3). The MATRIX treatment system is a three stage biological process contained within a single tank structure, based on the principles of a submerged bed reactor and designed in accordance with the requirements of BS6297.

    MATRIX Benefits: Ask about the possibility of a free site survey and technical proposal with no obligation.

    • Full technical back up and customer service support.
    • Single tank installation to minimise costs.
    • Failure alarm systems as standard, not at additional cost.
    • No mechanical or electrical parts within the unit.
    • Robust Polypropylene construction for easy and cost-effective installation.
    • No visual intrusion. Flat, flush ground level covers suitable for 1 tonne load.
    • Simple installation in vehicular areas, up to D400 loading.
    • Low running and maintenance costs.
    • Integral discharge pumps where required (all models) no additional tank.
    • Deep inlet inverts available to avoid pumping crude sewage to plant.

    CLF Unit

    The MATRIX system comprises the CLF unit itself and an enclosure containing an air blower unit, and comes complete with 10 m of airline.
    This comprises a single tank containing all the components required for the sewage treatment process. The CLF tank is manufactured in Polypropylene and is supplied in a standard black/blue colour. It is completely impervious to water and sewage and has been designed to ensure a robust construction and a long service life. The tank is provided with a locking manhole cover providing access to all parts of the unit. An air diffuser is installed into the submerged filter bed(s) and is located underneath the filter bed(s) this is connected to the external air supply (blower) by uPVC pipework.

    The blower is mounted along with its associated electrical controls inside a weatherproof enclosure. The electrical controls comprise an isolator and a loss of air alarm connected to an external beacon which will provide a visual warning that the blower is not operational.



    All our CLF units are for delivery by customer offload. This entails the customer to acquire the right manpower and/or machinery to help unload the tank/s from the delivery vehicle.

    If you require assistance with offloading, we may be able to offer a tail lift (lowers the tank to the ground) or HIAB (lorry with a mounted crane to winch the tank off the delivery vehicle). Please contact us if this is required for delivery.

    Product Details

    • Product Code: C and L
    • Colour: Black
    • Customer Offloading: Customer Offloading
    • Delivery: Free Delivery
    • Diameter: 1500mm
    • Lid Size: 900
    • Outlet Size: 110mm
    • 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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