I have had priming problems recently (still do) whereby the water level in the strainer basket is slightly lower that the sight glass lid when turned on- bubbles in there too. I'd say its 95% primed. Poor flow out of the returns with a steady flow of small bubbles out of the first return. Nonexistent flow out of the returns with the Polaris turned on - even though it has its own booster pump. I have had 2 Pool Pros come out to try to figure it out. I was getting about 4 psi, then I cleaned my DE Filter really well and now I am not registering any pressure ( on different gauges). ALL of the basics have been tried including
Water hose/drian king put in both sides of the suction line.
New O Rings
No above ground plumbing cracks
Question: I was thinking of cutting off my pvc inlet pipe where it comes into the pump. Then adding a new 25 foot pvc line from the pump and into the pool water. Then turn on the pump. This would tell me if the suction line has a leak or is partially blocked. What do you guys think of this idea? Of course the slope of the pvc would not match that of the pvc in the ground going to the skimmer.