Hot and Cold Water Systems

Legionella Control in Hot and Cold Water Systems

Hot and cold water systems in buildings supply fresh water for cooking and cleaning and other functions such as heating. Systems that supply hot and cold water range in size scale and complexity. Water is usually distributed throughout buildings through a pipework system. Hot and cold water systems need careful management, particularly in public buildings such as healthcare premises to reduce the risk exposure to legionella. Legionella bacteria is responsible for Legionnaires’ disease, an uncommon but serious lung condition.  It can be caught by inhaling droplets of water from hot tubs, shower heads or heating systems. Temperature control of hot and cold water systems plays an important part in reducing the risk of legionella bacteria within the system. Where possible, cold water systems should be maintained at a temperature below 20°C.  Stored hot water temperatures should be at least 60°C.  … Read more