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Old 05/21/2019, 09:16 AM   #11
Sharpimage
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Join Date: Jun 2016
Posts: 285
The water should not be at the tip top of the tank. You need to turn down the return pump. Your not getting enough flow from the weir to the drain box. That flow will be limited by the 3/4 inch fittings. Nothing you can do about that.

Then you will need to close the valve more to match the siphon to the overflow box flow


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