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Discussion Starter · #1 · (Edited)
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.
 

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Discussion Starter · #6 ·
Will this have an auto-restart if the power goes out?
I plan on drilling the tank so auto restart shouldn't be an problem unless the return pump wont start, but that wont make a flood. I am more concerned about the herbie getting blocked. There can be a pretty significant difference between the siphon plumbing and the top of the back up overflow. I don't want the water level raising 1.5 inches before it reaches the top of the back up elbow.
 

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Discussion Starter · #8 ·
Thats why you use 3 lines, and not 2. 2 are for intake, the other is the failsafe. You can also shave down the pvc so that it won't raise that high, if thats a concern of yours.
I considered that, the Bean animal overflow, I am waiting for the Reefingmadness overflow that uses 4 lines. Haha. Does anyone know if the water just comes up the elbow, flows over with minimal depth and down to the sump or does it fill the horizontal halfway or all the way? Or am I making an issue out of nothing. Maybe I should just build it and let it fly.
 

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Discussion Starter · #10 · (Edited)
"I am measuring the rise with the help of my finger"- best line in the video. Thanks for the laugh. It took me a few minutes to realize what a "gas kit " is but it was a helpful video.

I am typing this reply with the help of my fingers.
 
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