I am currently using a submersible 1Hp pump but it stopped working this is the second pump looking at a jet pump or centrafugal pump here is what I have: 500ft of 1 1/2 inch PVC with an elevation rise of 50ft and I have 4 zones each are 175ft with 6 pop up sprinklers using 3gpm on 1 1/4 inch pvc what suggestions of a pump should I use to get away from the submersibles. Not sure how to figure the TDH and all to see what size I need, I am running 400ft of 12/3 wire. Please give me a suugestion.