I have a new Pool the pump I have is a IntelliFlo 3HP VS, we started it up last thursday, I noticed there is air going thru the pump and into the filter. Pool builder said it was sucking air thur the skimer. So we raised the water lvl, still has air going thur thu the pump and into the filter, when i bleed the filter lots of air comes out till i see water in the bleed vlv, This is not right is it?