A few weeks ago, I installed a 1/2 HP WhisperFlo to replace the 3/4 Hayward that gave up the ghost. In doing the replacement, I used unions to allow me to install the new pump more easily. I'm hoping that's not a problem. Basically, since installing the new pump, I get a lot of air through the solar panels and into the returns. When I look in the pump basket, it's never full of water. It's so low, in fact, that I can see the water pouring into it from the pool. If I pull out the Kreepy's attachment in the skimmer, the water level comes up, but only a little bit. I've tried applying silicone grease to the O-ring on the suction side union and to the O-ring on the pump's lid, but I still get a lot of air. I've run a hose over all the connections and still have a lot of air and can't detect any leakage.
While I wasn't too concerned about all this a week ago, it seems to have gotten worse to the point that the Kreepy isn't as energetic as it was and the pump is making more noise, too.
What is the best course of action at this point? Also, how full should the pump basket be when running? Should there be any air in it at all?