Modified "Bean Animal" Overflow Drain Test

I tested the system at 3000 GPH, 2000 GPH and 700 GPH. At 3000 the system was still nearly silent, but did introduce some bubbles into the drain. It probably could be tweaked further to make it run bubble less at the flow rate. 2000 GPH was the sweet spot, with silent operation and no bubbles. 700 GPH would not purge well using the 1.5" pipe at start up. Using 1" pipe on the siphon line fixed that problem and the system would stabilize quickly.