I have a new model which I am trying to verify that the system curve makes sense. Each time I ran the a system curve, the curve started at zero rather than with static head and then had a normal looking curve. To troubleshoot, I simplified the model to include just the reservoir, pump, tank and pipe in-between. Still, I see the problem of starting at zero, plus the curve just shoots off to infinity now. After much troubleshooting, I simplified yet again by creating a new stick model using approximately the same elevations and diameters, lengths, etc. This stick model appears to give me a reasonable system curve. But when I try to find what the difference is between the two models to determine why I get different results, I come up empty. What am I missing? Something obvious, probably.

simplifiedmodel curve.jpgstickmodel curve.jpg

Thanks for any tips of things to check!