I have an issue when I try to vacuum my pool. I drain all the air from the hose by placing the hose in front of the return port, no problem. I hook it up to the skimmer basket and get really good suction then my pump pulls so hard that when viewing
through the glass top, the water drains down and pretty much there is a heavy gush of water the size of the 2" pipe going through the pump. Is this normal? I stop because I don't want the pump running without enough water. Shouldn't it stay filled to the glass top?