Planted Tank Enthusiast
Join Date: Nov 2008
Location: Morgan Hill, CA
Good point on the check valve and accumulated air. BTW, how do you suck the air out?
Be careful with making F as low as you have it in the diagram. I believe the water level in B (on the left side of drawing) will drop to be the same height as the bottom of the outlet of F. This means water falls down B quite a distance, possibly resulting in air bubbles being dragged along and up to the top trap.