Why do I get “unable to solve network hydraulic equations” or “network unbalanced”, when computing a model with several air valves?
Because air valves have the possibility to switch status, they can lead to instability in the model especially if there are many air valves in the system. To improve the stability of the model, it is desirable to force some of the valves closed. This can be done by setting the property “Treat air valve as junction” to True for those valves that are expected to be closed anyway.