I'm a Herbie club member

[mark]

It's now official (couldn't really count the one on my QT).

System was built with dual 2" Dursos as when set up never heard of the Herbie. Though no issues with the display as the Dursos themselves where silent, just the noise for the water going over the sides of the overflow, what's been bugging me for years is the gurgling that I hear in a room that's used for the computer and as a bit of a library (the basement sump room and the 20' drain lines run directly below).

It's a somewhat modified Herbie since the display has the overflow chambers at each end with one drain in each. Basically using one chamber is the main, the other the backup. Pretty much worked from the start with the only problem being since running the water higher in the display, the level in the pump section of the sump was lower so was drawing some air. Didn't really want to add more water as still wanted to have lots room for drain back. Ended up removing the last baffle to increase level (will reinstall once trim off about on 1"). Other thing I had to do was cut back the amount of drain line running into the 'fuge, as found when I turn the pump off, water was siphoning into the sump.

2" Spears gate valve
http://i67.photobucket.com/albums/h316/das75/GATE.jpg

Main drain at about 1000gph
http://i67.photobucket.com/albums/h316/das75/MAIN.jpg

So water doesn't go stagnate in the backup chamber, there's a 1/4" hole in the side of the stand pipe
http://i67.photobucket.com/albums/h316/das75/BAKCUP.jpg

Retired after close to 5yrs of trouble free use
http://i67.photobucket.com/albums/h316/das75/DURSO.jpg

[Delphinus]

I've been kind of wondering if something like that could work for dual overflows because I have the same situation with my cube tank, dual overflows with Dursos. It's silent enough but I like Herbie better and the tank has had chronic microbubbles since day 1 due to the flow through sump. I was thinking about something like this for when I go to move the tank.

So .. um .. thanks for the proof of concept. :)

[mark]

What the final plan is, is to raise the height of the backup chamber lip (silicone in some glass strips) rather than having it full of water with little movement.

[Delphinus]

And have it empty unless it was needed?

[mark]

that's right, water would only flow into it if there was a problem with the main. Realize bit of waste of space in the display having basically an empty overflow.

If was really ambitious guess could remove the overflow altogether. What would be visible would be the drain standpipe (keep about the same height as now) and the pump return line (would need to support), would gain about 5g. Negative would be if there was a problem with the bulkheads could be wet, but then I'm not worried about the CL returns.

[mark]

ends up wasn't ambitious and left overflow with emergency wet with a little circulation

emergency just at tank level
http://i67.photobucket.com/albums/h316/das75/DSC01696_zps44124be3.jpg


fitting w/tubing for circulation, coupler sits on top of standpipe, small stub as was easy way to adjust total standpipe height when first setting up emergency
http://i67.photobucket.com/albums/h316/das75/DSC01697_zps95c86833.jpg