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How to size a centrifugal pump in SewerCAD?

Hi there.

I come from the pumping industry in Australia and trialing the use of SewerCAD at the moment, we use steady-state modeling via excel sheets and also some of the other modeling tools available in the market. 

I have gone through the exercises available on Youtube and also from your learn server, where it doesn't actually represent a real-life problem, the pump curves are not just available for a project as you show, and in most cases, for a model it is the responsibility of the designer to choose the pump/s with the help of suppliers, for this, the designer is expected to provide a duty point ie. flow and required head. 

please see attached for a simplified real-life problem where we are required to work the pump duty point so we can select a pump. We can do this in various other ways as I have mentioned above and what I want to please know is how to tackle this from SewerCAD. How would you model a system to work out the pump's duty point without placing the pump? 


PDF

explanation of the scenario:

we have a wet well and the pump sets are submersible centrifugal sewer pumps. 

the incoming gravity pipework is 225mm Ductile Iron pipework, ID is 240mm. The peak incoming flow is 12L/s, and our requirement is the match this flow via the pump selection. ie. the pump flow rate has to be min 12L/s. The levels are provided in the model and based on this flow rate we have selected the forced main as 125mm PE100 PN16 (ID is 102mm)

In some of the other modeling tools, we can place the pump as a fixed flow pump and when we run the model it would develop the required duty point.

while searching about this topic, I had come across this: https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/16879/estimating-a-pump-curve-for-a-model but not too sure if this works or not. 

your help in this regard is appreciated and believe this will help many. 

Cheers,

Imran