Overflow?

[Herpn]

I picked up a used overflow at a good price yesterday. BUT the seller nor myself is sure how many GPH it is not sure of the brand either. Is there any way to get a ball park? Maybe if I measured it? I was hoping that it was 600 or so but not sure, it may only be 300? Is there a formula or anything I can plug the measurements into and get an idea?

Thanks,
Chuck

 

[mr pink floyd]

how many drains, and how big are they, if its 1 drain, 1 inch, probably abotu 600gph

 

[Herpn]

Thats sounds like it..... I will double check though.

Thanks..

 

[mr pink floyd]

post a pic

 

[Rockym]

Try this. http://www.reefcentral.com/calc/drain.php

 

[Herpn]

It is 1.25 X 7..

I guess it is about 600 then?

Thanks