Transcription of Hot and cold water table - Legionella
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Hot and cold water table - Legionella
Legionella in hot and cold water systems As part of your risk assessment you will need to consider: Notes cold water systems Storage tanks Keep volume of water stored to a minimum, ie just enough for one day s usage If using multiple tanks, ensure they are linked together so that water flows through each, avoiding stagnation in any one tank. Record total consumption of cold water of a typical day This check ensures the continuous flow of cold water to help avoid stagnation cold water storage water temperature Ensure incoming and stored water remains at a temperature of less than 20 C, eg if necessary site storage tank in a cool place and provide insulation Check temperature at ball valve outlet every six months and record any findings The most convenient place to measure is usually at the ball valve outlet to the cold water storage tank. Useful to consider maximum temperatures recorded by fixed max/min thermometer "This table should be interpreted in the context of the outcome of your risk assessment (see ) and the principles outlined on the Hot and cold water System page (see ).
Legionella in hot and cold water systems Avoid external contamination and build up of sludge, scale and rust Fit tank with tight fitting lid and air
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