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WaterCAD Multiple Pumps

Hello,

I have a network of 110 grinder pumps that connect to a force main. The grinder pumps are a combination of a 32.5 and 70 gallon storage tanks and the grinder pumps only turn on when they have reached tank capacity. I also have a master pump stations that serves as a re-pump to the force main. I am trying to determine how many grinder pumps can run at the same at peak hour (maybe from 7am to 8am for example). How do i model this in watercad?

I am using 2.5 persons or 250 GPD usage per grinder pump. I understand i will have to assume how much of the 250 gallons is used at peak hour (7am to 8am example).

Thank you for your help!!

Senhad