In an effort to quiet my overflow and boiling water sump noise I built a HGB to go into my overflow. The HGB works great and eliminated all of the sound from my overflow, but I still have a little too much sound from the drain in my sump. does anyone have an idea on how I can let the air from the drain release before it enters the sump water? I've tried raising and lowering the water level of the sump, but nothing worked. I've found that it is quietest when it have the drain output 75% submerged, but I still get alot of air escape and splashing. I drew a quick diagram of my sump. Hopefully someone has some ideas, I'm tired of the noise. Thanks in advance.