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Clenviro MATRIX CLF1A Sewage Treatment System (up to 9 person)

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  MATRIX Installation Manual

  MATRIX CLF1A Line Drawing

 All MATRIX Models and Accessories Price List 


The Clenviro MATRIX CLF1A Sewage Treatment Plant provides an extremely safe, efficient, reliable and cost effective solution to sewage disposal. All MATRIX sewage treatment systems meet and exceed all Environment Agency and regulatory requirements for process efficiency and final effluent quality. There are no mechanical components within the treatment plant itself thereby ensuring that maintenance is minimal, simple and safe.


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. As part of the test procedure the MATRIX system was proven to have one of the lowest operating costs of all sewage treatment systems. Furthermore, all Matrix systems are complete with failure alarms as standard (as required by BSEN12566-3). 



  • Price INCLUDES blower, discharge pump failure alarms and pedestrian duty cover
  • Full technical back up and customer service support from Direct Drainage
  • No mechanical or electrical parts within the unit
  • Robust Polypropylene construction for easy and cost effective installation
  • No visual impact
  • Simple installation 
  • Low Running and maintenance costs
  • Integral discharge pumps where required (all models) no additional tank


CLF Model

The MATRIX CLF1A system comprises the CLF unit itself and an enclosure containing an air blower unit and comes complete with 10m 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.


Product Specification

Population equivalent: 9 person
Colour: Black
Offloading: Customer Offloading
Diameter: 1700 mm
Depth: 1959mm
Inlet depth*: 600mm
Lid Size: 900mm²
Delivery: Free Delivery
Tank Use: Sewage | Below Ground
BOD/day Kg: 0.54kg/day
Flow/day m³: 1.35m3/day
Weight: 250kg
Blower rating: 60w/240v
De-Sludge frequency (approx.): 180 days
Pipework: 110mm

* Deeper inverts can be accommodated upon request



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.

Option for HIAB offload available on request at additional cost.

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

Lead times should only be used as a guide and are subject to change, please call our friendly team to confirm delivery and off-loading details on 01388 537 050.


Standard Commissioning

A Standard Commissioning carried by an RA Dalton Ltd accredited Engineer will include the following:

  • Carry out visual checks of the installation
  • Check the installation meets the manufacturer’s requirements, installed within their guidelines
  • Check all mechanical components
  • Check blower pressure, air hose, (aeration only)
  • Check clean air intake to blower housing/kiosk (aeration only)
  • IPS Models – check and test integrated pump
  • Test and set any alarms supplied with the unit (PPFDS, high Level Float)
  • Make any minor adjustments
  • Make any final connections
  • Provide a commissioning certification


On completion, RA Dalton will provide a site specific commissioning certificate




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