New pool owner here and trying to figure some things out as I get ready to close down for the season.
I've got a main drain and skimmer and they connect somewhere underground (only one suction line out of the ground into the pump).
I was curious to see what would happen if I plugged off the skimmer, as I thought maybe the easiest way to drain the pool below the skimmer for closing would be to plug the skimmer and just pump from the drain. After plugging the skimmer, I thought the pump would just pull harder from the main drain. What actually happened was the pump started losing prime and I could here a lot of air in the sand filter.
When things are running normal, there is no sign of air leakage anywhere, so what could be the issue here??
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