Quote:
Originally Posted by banditpowdercoat
If the white Box is a closed PUMP, not a SUMP, then No water will drain. Only will it drain if there is a leak in the plumbing. Then no matter what design you have. In a power outage with this design, the level in the Overflow will ballance the level in the tank. Nothing will over flow. It can't.
Now, when you ADD a sump. You need to make sure the sump can handle the extra water in a power outage, because it WILL drain from tank to SUMP, because the sump is open. It will drain the tank and overflow to the sump drain pipe level, thats all. Mine does this JUST FINE.
You will need to use a Durso style drain for sump in the overflow though. Thats the only caveat
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I don't think you get the point though, it isn't a closed loop anymore once you have the inlet in your overflow box. Since you have a durso to your sump, I'm guessing that your standpipe is pretty high, so it will drain to the level of your standpipe. The durso makes it not closed anymore. If you had no standpipe, your sump might not handle the flow. Anyway, we're off topic because we've established that I can't have my inlet in the overflow box due to Herbie style drain.