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Need to know average water pressure required in household?

pressure required on main water pipeto house hold
roger, January 2010
absolute minimum by law is 1 bar pressure / 10 metres head at the properties incoming stopcock (that's the one in the pavement, not the house) with a flow rate of 9 litres per minute.

bubblehead, January 2010
http://en.wikipedia.org/wiki/Water_supply#Water_pressure

Peccavi, January 2010