240 custom sump overflow issues

Swoll929

Exodon
MFK Member
Jul 2, 2017
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10-4 good idea. Thank you again
 

DN328

Potamotrygon
MFK Member
Aug 14, 2014
2,416
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Fish Tank
Are the specs for the pumps 3100/gph each? Are all 3 drains running full siphon?
 

jonnytat2

Exodon
MFK Member
Dec 25, 2016
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any pics of the front of tank? how you have the elbows on? i have something similar in my 210. no overflow box. 3 drains from DT to sump. on mine i have one drain at full siphon. and its i can hear the whirring in the pump. super quiete. have 2400 gph going thru without an issues
 

Grinch

Peacock Bass
MFK Member
Apr 23, 2014
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NJ
Are all 3 drains running full siphon?
I was thinking this too, but OP raised the tank water level and reported that sump water level didn't change. From this I took that OP 1) does not have air in the drain lines and 2) the drains are not meeting the demands of the pumps, whatever the GPH is. Given that I don't see any valves on the drains my conclusion #1 above may be incorrect. Good catch :)
 

Grinch

Peacock Bass
MFK Member
Apr 23, 2014
644
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NJ
Well, if OP can't sort it out with more direct lines, I guess going with a different drainage plan involving full siphon is the way to go. Someone else will have to give advice/direction on that though... I'm not experienced (clearly) with un-vented drains.
 

Swoll929

Exodon
MFK Member
Jul 2, 2017
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I do not believe i am creating siphon. The overflows are relatively loud. However i turned on both pumps an raised the water level only to find that the tank level rose but not the sump level.

I do not remember the 0 head pressure rating on my pumps all i remember is at 4' of head they should be 600gph.

The most direct pipe runs the largest amount of water, the mid length run produces a large amount less and the longest run produces even less.
 

Swoll929

Exodon
MFK Member
Jul 2, 2017
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Here is one drain, all three are the same. Sorry for the glare.

20170703_164837.jpg
 

DN328

Potamotrygon
MFK Member
Aug 14, 2014
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I suspect the drains aren't running with full siphon then. If they were it should be fairly quiet as it's not drawing air.

Post pictures of the overflow intake. How far below the water level is it?
 

Swoll929

Exodon
MFK Member
Jul 2, 2017
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Here are the over flows

20170704_074907.jpg

20170704_074833.jpg

20170704_074824.jpg
 
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