The pump to motor comes from the dealer already installed on the motor. There is no stress on either one of the connections. Some of my background. Senior HVAC tech. I also work on water softeners,chemical feed pumps,well pumps. I am not a know it all, but as far as having it installed wrong,stress point,water flow..that isn't happening as far as I can tell. I have been looking at a heavier duty pump. I have even thought of installing a well pump but the well pump is more set up for pressure not volume...Mike