I recently replaced the older 6+ year old hydrofoamer pump on my 9410 skimmer with a new 9410 hydrofoamer pump. The new one has a different style impeller which is yellow while the old one is black. My issue is the water level with the new pump wont go up the neck as far as the old one. Its been running 5 days but no matter how I adjust the valve on the airline the max the water level will get is about an inch below the small overflow hole on the back of the skimmer. I’ve disass the pump and made sure everything is seated correctly and adjusted the riser on the outlet pipe to the very top to try and raise it that way, but no luck. Any ideas?