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WaterCAD - huge flow into well from water tower and rest of system

Hi, I have a site with several wells, a raw water piping system, a water tower, and a potable water piping system. (Don't ask questions about the treatment and filtration of this water.. the answer is not optimal and outside the scope of this question). I believe I've set my elevations correctly, as well as my pipe directions.

I am getting a flow of -340,282,346,638,529,000,000,000,000,000,000,000,000.0 gpm at the pipe between one of the wells and its corresponding pump. I've even tried putting check valves in the pipes but I can't stop it.

Unfortunately I can't post the WTG file publicly due to the nature of the buildings in the network and the information I have on them. Any ideas as to what's happening?

Thanks!

Parents Reply
  • Also note that it is not necessary to include a check valve on the pipe directly downstream of a pump, consider removing those check valves. WaterCAD will not allow reverse flow through pumps for successful runs. A check valve on the downstream pipe is redundant and can sometimes impact the model calculations. When there is reverse flow through a pump that is a good indication that there is something else wrong with the configuration that needs to be addressed.

     

    Regards,

    Craig Calvin

    Bentley Technical Support

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