Pre Commission Flushing

S P environmental services, Legionella risk assessment, Chlorination, Legionella Control, Water Treatment, Water hygiene, Flushing, Birmingham, London, West midlands, staffordshire, walsall, cannock, nationwide
​What is pre-commission flushing?
Pre-commission flushing of Chilled and Heating water systems has been become more important over the recent years, due to the equipment being used is more susceptible to blockages at strainers, low flow areas, control valves and other small bore areas within the system. Contaminates such as jointing compounds, fabricating debris, welding need to be removed by high velocity flushing and chemical cleaning. This will then allow the on going water treatment regime to work effectively in preventing corrosion and microbiological fouling to the system.
S P environmental services, Legionella risk assessment, Chlorination, Legionella Control, Water Treatment, Water hygiene, Flushing, Birmingham, London, West midlands, staffordshire, walsall, cannock, nationwide
​What we do:
S P Environmental Services Ltd ​work to the current guidelines set out in BSRIA BG29/2012 to achieve the best results upon completion. The Dynamic Flush service follows the recommendations of BSRIA, which consists in general of the following steps​
  • Inspection of the system and identifying ideal flushing points, if these have not already been allowed for by the designer or mechanical contractor.
  • Identifying whether the mechanical contractor is to carry out the static water flush prior to chemical cleaning.
  • Flushing the system with water at high velocity to achieve the flushing velocities recommended by BSRIA or system design.
  • Undertake chemical cleaning of the system water to remove corrosion deposits and to mobilise any suspended solids present.
  • Bio-wash may be required prior to system cleaning.
  • Testing the water for the presence of biological fouling, iron, chlorides, conductivity Ph, copper and aluminium etc as well as testing the water for TVC, Pseudomonads and Sulfate-reducing bacteria.
  • Analysis of samples at UKAS Accredited Laboratories.
  • Addition of glycol and a corrosion inhibitor for long term protection.
  • Installation of a side stream and hydro-cyclone filtration to remove suspended solids.
  • Regular monitoring visits to chemically test the water and maintain the correct inhibitor level and to ensure that bacterial levels are within acceptable limits.

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