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Cold water temperature within pipes should not exceed 25ºC and ideally stay below 20ºC to maintain steady flow, prevent stagnation and reduce the risk of Legionella growth.
Regular temperature testing is essential for legionella risk management and should comply with HSE ACOP L8 and HSG274 guidelines. Adequate measures should be taken to ensure that this temperature is not exceeded. To prevent warming, insulate both hot and cold water pipes and shield fittings from heat sources like sunlight or nearby services.
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