ok here is an update, just got off the phone with him, he saw that the pump came with a little ball valve, so we have that taken care of but as he slowly adjusted the ball valve he noticed that instead of the sump draining too fast it kept filling up almost overflowing. So i guess that means his overflow is clear and not blocked. Now i am stumped, unless the pump is clogged some how or something what could cause this. his overflow is not bigger then the pump. How could 300 or 400 gph overflow box drain more water into the sump then a 780gph pump push back up into the tank. anyone think of any ideas of what this could be now, anything, nothing is too far off i am going to be on the phone with him all day tomorrow trying to solve this problem. hope the above makes sense i am a bit tired