Colloide are successful suppliers for £10 million AMP7 contract with Southern Water

Colloide have been successful in bidding for the contract to supply chemical dosing packaged units.

Southern Water’s £10 million AMP7 contract which went out to tender in May 2019, covers the provision of plant, materials and services for the design, supply, installation and commissioning of packaged chemical dosing units for approximately 78 sites in the South East of England. These sites include both water and wastewater sites using an assortment of chemicals, but mainly focusing in on ferric.

Southern Water provide water and wastewater services for Kent, Sussex, Hampshire and Isle of Wright, supplying 532 million litres of drinking water to 2.5million customers. The initial contract duration is for 4 years with a possible extension.

The scope of works includes 6x variable capacity chemical dosing units from 1.0 m3 total tank capacity 1.4 l/hr dosing rate to 30 m3 total tank capacity 42l/hr dosing rate. Colloide are looking forward to working with Southern Water again and their delivery partners on this contract.

Subcontract Scope:

  • supply of chemical dosing package units to the agreed framework design,
  • deliver to site and offload making provision for any access requirements,
  • place the chemical dosing package unit on to a pre-constructed concrete plinth,
  • secure the unit into place on the slab via tensioned bolts,
  • the installation of all pipework to make the chemical dosing package unit function in accordance with the conditions of subcontract,
  • the installation of all cabling to make the chemical dosing package unit function in accordance with the conditions of subcontract,
  • test and commission the chemical dosing package plant in accordance with the conditions of subcontract.

Provide all documentation upon completion to include:

  • test documentation,
  • O&M manuals,
  • 3D drawings,
  • training,
  • spares.


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Colloide design and build customised chemical storage and dosing systems for a wide range of chemicals and applications. These packages are tailored to suit our clients’ requirements. Find out more about our chemical dosing solutions or discover our full range of innovative technologies.