Pump Selections
Flowrate
The flowrate for the system must be less than or equal to the flowrate generated from the two pumps in parallel location at the bottom of tank two. Our system must be able to pump stormwater out of manhole two just as fast as it is being pumped in. The pump model for the pumps located at the bottom of tank 2 was provided in the Northern Arizona University Stormwater Drainage Report. The pump model found for tank two is the EBARA Pump Model 50DSH61.5 (2HP) submersible sump pump
The system curve for the design pipe with a diameter of four inches crossed the doubled pump curve at 193gpm, therefore the design system is within capacity of tank two’s system. The team used the same pump model as tank two, the EBARA Pump Model 50DSH61.5 (2HP). Two pumps will be used in parallel to maximize the capacity of the design system.