Cold water storage

P​rotecting cold water storage cisterns from undue warming

Undue warming is of concern for two reasons. It can potentially cause a deterioration of water quality and often result in customers leaving taps to run to waste.

Cold water storage cisterns and associated pipework should be sited away from heat sources and insulated.

Systems supplying cold water should be ideally designed to ensure that they distribute water at temperatures no greater than 20°C. This requirement may also apply under other legislation and code of practices, such as those relating to legionella control.





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Uncontrolled if downloaded. This is informative, non-statutory guidance and intended for general guidance purposes only; it is subject to change.

Compliance with this information should not be relied upon as guaranteeing no enforcement action will be taken by water undertakers. Water Regs UK accepts no liability for loss, indirect or consequential loss arising from or in connection with this guidance document.