Tried to vacumn the bottom of the pool today and lost pressure when i hooked up the hose. I quickly urned off the pump. I then filled the hose with water and attached it to the round plate that fits down into the skimmer which has an elboe coming from the top. I turned the pump back on and lost pressure again. The pump was sucking real hard.
I have a Hayward sp1510 pump and a Pacific Fab sand filter and one of those contoller things where you can back wash/waste/filter.