<a href=showthread.php?s=&postid=6973688#post6973688 target=_blank>Originally posted</a> by Racso
just for clarification, AGA overflows are rated at 600 gph, but that does not mean a 600 GPH pump. You have to figure in head hieght. I know someone running a AGA 120 with 2 overflows running a 2400 GPH mag drive on it (turned down a bit). I know at peak performance, a mag drive 18 will do 1200 GPH at 5 feet, thus 600 GPH each. Also, anything AGA over 110 they only make with two overflows, thus a 1200 GPH flow.
Again, just for refrence.