Question for the beananimal overflow experts

[braid11]

[quote=Cal_stir;691730]....the sec is used to control the water level in the overflow box. ...QUOTE]

Isn't it the siphon with the gate valve that controlls the water level in the overflow? That has been my experience. Once it gets to full siphon, I can tune it a little: open it a bit more to carry a bit more flow, or close it a bit to flow a bit less, changing the water level in the overflow.

Tom