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What are the official standards for water pressure?
The guaranteed standards scheme (GSS) sets out that water companies shall maintain a minimum pressure of water in the communication pipe serving the premises supplied with water of seven metres static head. Companies also monitor the number of properties at risk of low pressure against an indicator known as DG2. The DG2 measure is ten metres head of pressure, at the external stop tap, at a flow of nine litres per minute. This should be sufficient to fill a one-gallon (4.5 litre) container in 30 seconds.
Companies report to us each year about the number of properties failing the guaranteed standard and those at risk measured by the DG2 indicator. You can see these in Service and delivery - performance of the water companies in England and Wales 2007-08 report.
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Your rights and responsibilities
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