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The high week-end and low weekday use of this facility, plus seasonal variations in water usage, led to an increase in detected legionella counts. A solution was required that would be easy to control, simple to retro-fit and would operate equally effectively in periods of high and low usage. 

A Tarn-Pure system was installed on the central cold water storage tank that serviced hot water make-up and distributed cold water. A flushing regime was instituted to ensure that the outlets in empty rooms were regularly opened. Legionella is no longer a problem, which is confirmed by on-going water analysis.