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General Plumbing and Gasfitting Talk => Plumbing => Topic started by: billyhealey1993 on April 21, 2020, 03:46:00 PM

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Title: help with question from past certifying exam
Post by: billyhealey1993 on April 21, 2020, 03:46:00 PM

 A factory requires water to be supplied that gives a flow rate of 230 litres per minute at a pressure of 750 kPa at the outlets.
 The supply pressure is 835 kPa.
 Give the minimum diameter of the RPZD that can be installed to meet these requirements.

I know the answer is 64
but is there an equation or formula to find this out