Which SewerGEMS solver is best for sanitary sewer model with lift station that has intermittent high points? I currently have a model set up and running the SewerCAD solver EPS, but I am not sure if this is the best solver for the job. I want to be able to check/validate the pressure at high points for the need of Air Release/Vacuum Valves. In the current SewerCAD solver, if appears that when the lift station pump stops running, all flow in the system stops and there is no check for the condition on gravity flow "away" from high points that would have the potential to create a siphon.