Where should the water level in an overflow box be? Can we even control that? I am building a no teeth box and figured on putting it just above the trim level so the water surface is not visible. Where would the water level in the box be: at the bottom of the hole, halfway full or would it be above the fitting? For a herbie design what should the height difference be between the top of the back up drain and the bottom of the siphon? I am trying to figure out if the holes should be on the same line or staggered a bit.
I am using 1 inch bulkheads, flexible tubing, and the box will be roughly 7x4x5.
I am using 1 inch bulkheads, flexible tubing, and the box will be roughly 7x4x5.