I fired up the pump/filter for the first time this season and I'm getting no or very low pressure on the filter's gauge.
I let all the air bleed out so it's a constant stream of water. The return seems to have good water pressure coming out of it back into the pool. Nothing seems to be leaking. I let it run 2-3 minutes and then turned it off so nothing would get ruined...
Any ideas why I'm not getting a pressure reading?