Opening the pool, Hayward Equipment. Pressure on pop up's has been very low. I realized that last year I swapped out a 2hp motor for a 3/4hp motor as a temporary solution when I lost one. I just installed a new 2hp motor with pump repair kit and I thought things looked great. I had high pressure now on the pop up's and they seemed to be working. However, within a about 20 min the pop up's stopped working altogether and have not worked since. I've checked all valve positions, although nothing was labeled from the day I moved in, and believe all valves are where they should be. I currently have no idea why the pop up's stopped. I am down to the tearing apart the system that drives the pop ups but didn't want to overlook anything simple. Any ideas? Thanks in advance!