Choosing Overflow Size

[dawgwe1]

Educational video showing how large an overflow should be to keep up with your return pump. I thought it was interesting. Done by Aquatic Animal Health Program at Oregon State University

 

[dnjan]

And that wasn't even considering additional headloss through a longer drain line (including elbos, etc) as well as reduced flow over time due to the accumulation of crud on the inside of the drain line.

 

[kpiotrowski]

yeh, it was pretty basic stuff for a "science" guy.

 

[Spinner]

Good video nice learning tool
It has been awhile but i believe its 10" of standard teeth overflow per 1000gph? With overflow drains i always double inlet size as i don't like valving back my pumps.