As part of your responsibility to control the risk of legionellosis: regular cleaning;
maintenance and disinfection is required to remove contaminants that may harbour
bacteria or act as a nutrient for bacteria to multiply.
Cold water tanks accumulate sediment at a varying rate. When the base of the tank
is obscured by sediment it is usually time to remove this by chlorinating the tank,
draining the water and removing the sediment. The tank is then refilled and chlorinated
to 50ppm chlorine for 1 hour. Some tanks require annual cleaning and disinfection
while some building managers particularly in high risk properties such as care homes
and helthcare departments opt for annual clean and disinfection as part of their
legionella control scheme.
If chlorination is carried out in response to legionella colonisation then the water
is circulated to outlets and the dose checked over an hour period increasing the
chlorine present as required to maintain 50ppm.
During cleaning and chlorination we can treat, paint and seal any corrosion of metal
tanks and intsall lids, vents and screens to ensure the tanks are compliant with
the approved code of practice.
Showers and taps may accumulate scale which has to be removed so that bacteria cannot
shelter and grow. Descaling taps and disinfecting shower heads is an essential part
of legionella control.
Dead-legs can be removed and redundant plant isolated.
Click Here to obtain a quotation for water service maintenance, clean and chlorination.