Specific Installation Guidance


Water fittings accommodating expansion and pressure surges 

To address contamination concerns associated with stagnation and particulate accumulation it is recommended that any fitting on a wholesome water system which accommodates expansion or pressure surges, such as expansion vessels, pressure accumulators and surge arrestors, be installed so as to avoid localised low turnover (stagnation).

Specifically, they be installed securely in the vertical so that the water fitting is:

1. bottom fed and upright

2. the connecting pipework to the fitting

- rises continuously

- is kept to a minimum

3. sized correctly for the system

4. designed to ensure an adequate turnover of water within the expansion vessel. 


For further information contact the local water undertaker.


To improve this information please give us your feedback >
Your Feedback


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.