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Old 05/23/2019, 12:13 PM   #15
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Join Date: Sep 2006
Location: Lake Jackson, Tx
Posts: 548
I would turn the pump down to about half. Then adjust the gate valve to match. You are overwhelming that 1200 gph overflow. I wouldn't put more than about 600 GPH through it. Then I would adjust the position of my emergency so that it is higher, as well as the open channel. When running normally you want the water as high as you can safely get it in the rear box. Then it will make much less noise.

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