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Cold water storage turnover calculator

Oversized storage that turns over slowly lets cold water warm and stagnate. Enter the stored volume and the daily draw-off to see how long water sits before it moves.

Total capacity of the cold water storage tank(s).
litres
Water drawn off through the tank in a typical day.
litres/day
About the numbers

Daily demand is best taken from a meter or design figures and varies hugely by occupancy. Cold storage is commonly expected to turn over roughly daily, that is guidance, not a fixed rule; your risk assessment governs. Source: HSE, HSG274 Part 2 (2024), ‘Operation and inspection of hot and cold water systems’, p.70.

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"Cold water storage turnover calculator." Legionella.io. https://legionella.io/tools/storage-turnover-calculator/

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