New pool owner (of an old pool)..
Everything appears to operate normally when using just the skimmer. Operates at 12PSI with no air in filter or return jets. There is a small pocket of air in the pump basket that has always been there. Might see one or two tiny air bubbles come in from the suction tube every second.
If I hook in the manual vac, the filter PSI goes very low to about 4 and there is not a lot of water in the pump basket. Pump quite loud. Should this happen?
If I hook in the barracude g3 vac, the filter PSI goes to about 8, and there is a stream of air bubbles in the return jets as well as accumulation in the filter.
With either vac, the pump water is too much sloshing to see if there is more bubbles coming in from suction side.
The pump lid has been cleaned & lubed with no improvement. Have checked for any leaks in suction side pad with shaving cream and water did not find any. Have tried new zodiac hoses with no difference. Manual vac hose is new.
Any final ideas before I have to shell out bucks to have suction line pressure tested? My only theory is that there is an air leak which gets worse with added vacuum. Or an obstruction only seen with added vacuum. Dont know how to test for that.
I have not checked the impeller yet. Been tired of spending all weekends troubleshooting. Could this cause this behavior or would it not even operate normal on skimmer?
20k gal in ground, FNS plus filter, pentair pump, one skimmer inlet to pump (pentair u3)