reservoir and Booster pumps

[swazimatt]

I am in the process of designing a new industrial precinct that will require a storage for firefighting and a pump to supply the network.
The idea is that the reservoir will be supplied by the network, but this will be the same network that the pump discharges into (as a booster pump and fire pump), how do i prevent the pump from short circuiting and flow just looping back into the tank

I have modelled it in EPANET and find the only way i can reduce the flow back into the tank is by restricting the tank supply diameter to 50mm. This seems very small for a 1000m3 tank with 250mm dia pipe from the pump into the network.

Is there a good source that i can read up on regarding networks with booster pumps

 

[pierreick]

A sketch, please
Pierre

 

[LittleInch]

You simply need to add in a no return valve between the point where the pump connects into the network and the upstream point where the pond supply is made.

But yes, a sketch or diagram would aid matters for sure.