How much water through an overflow

Icebox

Member
Does anyone know how much flow one can get through an overflow? I have been thinking about plumbing my tanks a little different and running both drilled holes in my AGA as drains. Anyone know how much water I should be able to get to flow through a 1 inch hole and a 3/4 inch hole? 1000 gal an hour?
 

Pro_builder

Well-Known Member
Not sure exactly what it will flow, but I am testing the same thing on my tank. Running both as overflows. I am currently running over 1100 gph through mine.
HTH
 

tankgirl

Active Member
Hi Ice,
I've got a 1" u-tube in the overflow for my small tank and am running a Rio1700 on it (a bit less than 640G/hr) - that's pushing the envelope a bit for the 1" u tube, but seems to be fine.
Hope that helps! :)
 

mwrager

Active Member
I have two 3/4 in over flows and I am pumping about 1150 gph. I have had no problems yet. I am thinking of adding another 600 gph pump making it a total of 1750 gph.
 

Pro_builder

Well-Known Member
Are we talking about an OverFlow Box or 2 hole drilled in the bottom of the tank?????
I have 2 hole in the bottom that are flowing 1100
Just to clarify, on my end
 

mwrager

Active Member
Sorry, that is correct now that i think about it, it is 2 hole drilled in the bottom of the tank:spinner:
 
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