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Domestic Water System Management Facts: Legionnaire’s Disease is a potentially fatal form of pneumonia caused by legionella bacteria. It can affect anyone but some people are at higher risk, including those over 45, smokers and heavy drinkers, people suffering from chronic respiratory or kidney disease and people whose immune system has been weakened. The bacteria is transferred to us by inhalation of aerosol particles of infected water, by use of showers, sprays and the like. Legionella bacteria are common in rivers and lakes as well as artificial water systems such as storage tanks and pipe work. If allowed it can be found in larger water systems such as swimming pools and cooling systems in buildings, but it can live and breed given the right conditions in smaller water supply systems used in homes. Legionella bacteria can survive at low temperatures but quickly develop at temperatures between 20°C and 45°C. Allowing water of both hot and cold systems to stand for long periods (weeks) in pipework at normal room temperature (21°C) provides a good environment for bacterial growth. Precautions: Whilst the risk of contracting Legionnaire’s Disease is very low, there are certain precautions that you can take to keep levels of bacteria in water systems low. If you have a shower installed clean the shower head regularly Run your shower at full temperature for a few minutes if you have been away or the shower has not been used for several days. When you have been away from home for extended periods of time (one week or more) – run the hot and cold taps for at least 1minute allowing a full flow of hot and cold water from the taps . Make sure that lids are on any water tanks in your loft and that the tank is insulated. (If you are doubt about this please contact us) Regularly use all the taps (both hot and cold) wherever located inside or outside of your property (house, garage, outbuildings, etc) Do not tamper with the maximum temperature setting of any installed hot water heating system of your property. Allowing the regular servicing of Boilers etc. and prompt reporting of any noticeable reduction in hot water temperature will insure the system is operating correctly.