I still have one overflow working as a siphon. I just thought maybe the 1 1/2 inch line might not be able to handle the return. So instead of joining them before the sump I just run each to the sump. But I still can't run my return pump wide open. Oh well I guess I'll just have to throtle it back a little. It's a dart pump about 3500 gallons per hour. Does anyone have a return set up for this kind of pump?
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