plumbing and back flow

[Gorgok]

What I can do, however, is grab an EB4, pump and UPS, set up three sensors to detect the eminent overflow and have my Apex detect a power outage through my EB8's then pump the water to drain to prevent the overflow. Will be a good mitigation to reduce the overall risk.

Drilling the sump for a bulkhead above the normal waterline and plumbing it to a drain would work better... No issues of failing to detect an overflow (or even falsely detecting one), a flooded pump actually starting after sitting a long time (with growth more than likely) or batteries crapping out and the other risks they present. And its cheaper =D.

 

[coffee_snob]

To solve the problem add pvc to the return bulkheads that goes straight up to almost the top of the water then back down to where ever you want it. At the top drill one or two small holes that will act as vacuum break as soon as the water level drops to it. It will only drain back that much water when the pump shuts down. No check valves will ever be or should be needed. I can draw a diagram if you need it.

skeeter

+1