Originally Posted by uug197h

ofwat says

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 9 litres per minute. This should be sufficient to fill a one-gallon (4.5 litre) container in 30 seconds.


hope this helps


Note if the pressure is less than this twice in 28 days the customer can claim £25 from the local water company