I've cut all the pvc for the suction lines....before I cemented everything in, just wanted to get an opinion of some of the experts to make sure the design is acceptable is far as head loss etc etc....The 2 lines coming in are from the skimmer and the main drain and are 1.5"....the branch tee has 1.5" coming in and 2" going out to the pump....and the rest of the pad plumbing is 2" until it gets to the return line which is 1.5" that goes underground...