Does your water tank need a clean?


Purchasing a GRP water storage tank can be a big decision as to which one is the right tank for your configuration, however if it is supplying water for human consumption, one consideration which is overlooked is an annual inspection and disinfection. 

Water can harbour many different types of bacteria, with some being harmful if consumed by humans. One harmful bacteria which is most commonly knows is Legionella disease.

Outbreaks are very low, however outbreaks of the illness occur from exposure to legionella growing in purpose-built systems where water is maintained at a temperature high enough to encourage growth. If conditions are favourable, the bacteria may multiply, increasing the risks of the disease, and it is therefore important to think about commissioning of your water tanks.

A tank inspection, clean and chlorination of a tank and its services is recommended on an annual basis and when there is visible evidence of the following -

  • Sediment
  • Stagnant water
  • Biofilm
  • Corrosion
  • Flora growth
  • Animal Contamination

To prevent and for peace of mind we offer the below inspection, clean and chlorination of your GRP water tank.



Clean & Disinfect Cold Water Storage Tank Work to comprise:

  • All labour & materials to carry out the following:
  • Inform the relevant personnel of any interruption, disturbances or potential of such, to the water supply that may occur
  • Carry out a visual inspection of the storage tank ,logging and reporting any leaks or problems before commencing work( if the tank has a division then each compartment will be cleaned individually ensuring a constant water supply).
  • Isolate the Incoming and outgoing water supply (checking correct operation of valves)
  • Drain down the water storage tank or individual compartments
  • Photograph internal surfaces prior to commencing the tank clean
  • Using clean water only, clean all internal surfaces using non-metallic equipment and tools
  • Remove all debris from the inside of the tank where possible
  • Re- photograph clean internal surfaces
  • Commence refilling the tank with mains clean water via Inlet valve
  • Check & clean filters in overflow, warning pipe and tank breathers (if accessible)
  • Disinfect the tank and leave to stand for 60 minutes
  • Test water for correct PPM levels
  • Take any samples (if ordered)
  • Place the tank online
  • Issue a full report and certificate of compliance in accordance with ACOP L8 (2013) requirement