[untamed]

Originally Posted by Kabong

I got it.
So Technically it would probably work, But I'd just be begging for a flood without a back up pipe.

Any one else running a Herbie setup could you give your drain size + your Aprox flow.

Yes, you can silence a single overflow pipe using a gate valve and run a Herbie using only 1 pipe. But it would be stupid.

My system uses twin Herbies (4 actual drains). Each is 1.5". Flow of about 800-1000 gph through each side.

Here's an idea that might work. Add a second overflow pipe that comes up from your primary overflow pipe that will flow if the overflow box level goes too high. In the picture below, the red dot is your gate valve. You would need to get the height of this emergency drain just right.

Call this the "Untamed" mod.