I have a 2 1/2 HP Sta-rite Maxi-Pro pump and can't find information anywhere on it that says what the GPM is -- only the RPM (even on the web -- I can find stuff like this page:

http://www.topdog.web.aplus.net/Merc...PUMPSAND-1-STA

which is close although my own pump is 1/2 HP larger)

I'm trying to figure out how long I need to run it each day but without that info I don't know if it's possible.