Per the subject line... I don't recall this happening before. I throw the vacuum hose into the water and do my best to fill the hose itself with as much water as I can before i attach the skimmer adapter and hook it in (manual suction brush) But shortly after the skimmer adapter gets pulled in, the pump just loses prime.
I've tried putting the skimmer adapter when the pump is already running and also from when it is off, but the results are the same.
After i take the skimmer off and start the pump the prime comes back within 20 seconds or so by itself.
What am i doing wrong?