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Old 12-11-2012, 12:12 PM   #11
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If you think about how an overflow works, if your pump is putting 400 gph through (400/60 mins = 6.67 gallons a minute) , it will naturally raise the water level above the drain... All that water has to get funneled into a 1" tube.

It looks ok to me, but maybe someone with more DIY overflow experience can help out from here?

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Old 12-17-2012, 02:01 PM   #12
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The only way to reduce how much water is over the pipe is to increase the pipe size. Remember gravity wont flow as fast as pressured unless you have that head pressure which is the 1" above the pipe. If you put a larger return pump it would go even higher or if you put a smaller it would go lower. Bigger overflow pipe= lower water level... Smaller overflow pipe= higher water level.

Hope this helps.

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Old 12-17-2012, 02:52 PM   #13
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Thank you Robert.
I'm following what you are trying to say.
I kind of lowered the overflow level so that the water level is within acceptable limit below the tank top.
Planning to put another overflow soon.

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diy, flow, overflow, pvc, pvc overflow

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