Cold water storage

L​inking cold water storage cisterns

Due to concerns about water stagnation which might cause the quality of the water to deteriorate the installation of inter-linked storage cisterns should be avoided wherever possible. Where it is unavoidable, the number of inter-linked cisterns should be minimised.

To minimise the risk of stagnation

  • The storage volume should be kept to a minimum
  • Cisterns should be connected in parallel
  • Any demand should create water flow throughout each cistern
  • Inlet and outlets should be installed at opposite ends of the cistern
  • Delayed action float valves should be used.
  • Metering of inlets may assist with balancing of turnover.






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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.