Q. WHAT IS THE MAXIMUM/MINIMUM WATER PRESSURE THAT A WATER SUPPLIER MUST PROVIDE?

A. Maximum

There is no legal requirement in respect of the maximum supply pressure. Where the supply pressure exceeds the maximum working pressure of fittings it is the customer's responsibility to install a suitable pressure reducing valve or change the fittings for ones suitable for the existing supply pressure.

Minimum

The minimum pressure requirements as set out in the Water industry Act (1991), Water (Scotland) Act 1980 and Water and Sewerage Services (Northern Ireland) Order 2006, is that needed to supply the top-most storey of every building within the undertaker's area of supply. However, the water supplier is not required to deliver water at a height greater than that to which it will flow by gravitation through the existing water mains from the service reservoir or tank from which the supply is taken.

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