Our pump was working fine up until a week ago. We flipped the pump off to backwash since we had some bubbles coming into the return directionals. Since then we can not get the pump to prime for the life of me! We've replaced the O-rings and lubed them on both pump and sand filter. We also replaced the spider gasket in the filter head. The water is 3/4 up the skimmer, we've placed a hose in the lines from the pump to the skimmer to see if there was a clogged- doesn't seem like it. We've tried on port one and port two as well as on back wash and on recirc.
The pump will suck what is already in the pump up but it won't pull more water in through the lines. We have a pinnacle high speed pump, and an in ground pool. I am at a loss and about to pay 150 for pressure testing.. Help? Ideas?