How many gph can my single 2" overflow handle?

[Time Lord 1]

As in title, ive just test filled my 150g and sump and i now need a return pump, im looking at a 3800lph but wondering if my overflow can keep up? Its drilled in the bottom



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[jsodwi]

Is it 2" PVC drain or just a 2" bulkhead? I have 2-2" PVC drains on my 750g and I pump roughly 6500 gph thru them. So you can easily flow 2400gph which is more than overkill on a 150g.

 

[Time Lord 1]

Hole in tank is 60mm internal diam of pvc is about 53mm so near enough 2", im thinking, nearly 4000lph, so nearly 1000gph so should be fine i guess. Its 150uk gal, i think thats 180 us gal, 700 litres either way + 100 litres in sump

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[Jc1119]

My 2" line and gate handles 2400gph easily, but I'm running full siphon drains. You should be fine pushing 3800l(1000hph)

Here's a chart without full siphon to give you an idea.....
http://www.wetwebmedia.com/BulkheadFloRateArt.htm



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[Time Lord 1]

Perect thanks

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