need more info here.
what kind of height does the pump have too raise the water (head pressure)?
what type and size of plumbing are you using?
this will determine what size of pump your system requires. are you are looking for a pump like a mag 3? a mag 3 does 350 gph at zero head, but will dramitically drop at say 4-5 feet of head.
hang on, i have a link i think.
