I walked outside to do my daily check of our 26,000 gal. pool. Skimmers were clear, pool was blue, but the filter was at 0 lbs of pressure. I turned off the electricity to the pool and checked my pump basket. It was clear. Then, I re sealed the pump o-ring in case it was getting a little dry. I turned the pool back on, opened the filter's air valve and the pump still wouldn't prime. I let it stay on for 2 minutes before shutting things back down. I had just vacuumed the pool the day before so I checked to see if all of my levers were pointing in the right directions. They were all correct. I then decided to unscrew the motor from the pump. The diffuser was cracked around the screws. So, I screwed the motor back on and ordered a new diffuser. Today, I installed the new diffuser and the pump still won't prime! Help! Photos are of the old diffuser.