The following water sources present for optimum problems as a way to advertise the growth of Legionella:
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• cooling towers, evaporators, liquid coolers that get the job done around the evaporation of water to get rid of heat (industrial cooling processes are known sources);
• hot-water circuits and tanks that has a drinking water temperature of about forty ° C
• Humidifiers and fountains that unfold aerosols and incorporate h2o at elevated temperatures;
• iron pipes, rubber seals;
• whirlpools;
• treatment pools (> 35 ° C);
• stagnation of h2o over the conclude of pipes, standpipes, eye washes;
• air conditioning.
When water beneath twenty ° C multiplies Legionella not shift. They could survive in it. Water aquiring a temperature earlier mentioned fifty five ° C will eliminate the Legionella bacterium.
Avoidance
Central towards the prevention point out, the temperature of your tap water. Hot drinking water lines should, if 1 is functioning by using a central heating, at a temperature of 60 ° C. Cold water will have to remain under 20 ° C. The return pipe to the heater need to guarantee a water temperature of a minimum of 50 ° C.
Problems contain:
• insufficient isolated in the mains;
• too close to each area from the incredibly hot and chilly water circuit;
• large length among the heating issue and faucet;
• inadequate capability of your boiler or storage tank;
• inadequate recirculation move in circulating circuits;
• storage tanks, boilers and shower and tap heads should be cleaned frequently and decalcified;
• it have to arise during the pipes stagnation of water.
The extreme temperature on the very hot h2o circuit presupposes the common usage of thermostatic valves.
Flush pipes with water at high temperature is really an efficient means. The bacterium dies off in a short time (about 3 minutes) at temperatures of 70 ° C. Hence it is suggested to rinse the circuit with water of 70 ° C for 5 minutes or sixty ° C or even more for 20 minutes that may be efficient involving 60 and 70 ° C on the draw-off place.
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