iI have a ehiem 1262 i just bought about a month ago to hook up my chiller. I have the pump in my sump, it feeds up 18" the down 30" down to basement (where chiller is at) across 5ft to chiller and back the same distance back to the sump. it seems that all that piping is reducing my flow to much and my chiller can not cool enough in this application. i need more flow and have to find away to get pressure rated pump that will give me atleast 1500 gph. self priming will be best. is there anything out there like this