So I have two Tanks.
Tank 3 already exists. Tank 4 is going to be installed.
They wanted to test out how the system work once tank 4 came online.
I can't seem to get the System to balance once I add Tank 4 and Pump B-3B. Its got identical setting to Tank 3 and we added a third pump that is an identical to the ones that already exist.
PDF
Try troubleshooting steps mentioned in below wiki, to see if that helps.
Troubleshooting the Network Unbalanced or Cannot solve network hydraulic equations user notification
If the tanks are hydraulically close to each other, it would be a problem in calculating the equations, if possible you could model them as a single tank if above steps are not helpful.
Rapid flow oscillation between hydraulically close tanks
You may upload model files for our review, if required. Sharing model files.
Regards,
Sushma Choure
Bentley Technical Suppport