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Discussion Starter · #1 ·
I have a glass-holes overflow on one my tanks and for anyone else that has one will know they are not as quiet as they calm to be. I have tried couple dozen different ways to try any quiet it down with no success. The problem can probably never be fix because it's an Air/Water mix drain.

So my idea is to make a second box between the glass and bulkhead that hang on the back the same way an HOB overflow would. But instead of the water being siphon up and over the rim of the tank, it will simply just flow through the bulkhead into the box behind the tank. Then i can use the herbie method
where the main drain line has a ball valve at the end of the drain line to control the water level in the back overflow box and a back up drain in case something gets plugged at the ball valve. This will allow the main drain line to be completely submerged, no more Air/Water mixing, which is what creates all the noise to begin with.

simple drawings




What are your thoughts on this idea?
 

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Sounds like a reasonably sound idea to me.

How many existing holes do you have to work with? It occurs to me that you might be able to do a modified Herbie or Bean Animal *through* the wall into your notional internal overflow box ....

I assume you have already looked at the Durso type and found it wanting?
 

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Discussion Starter · #3 ·
I only have one 1" bulkhead work with. I'm not familiar with modified herbie or bean animal, how do they differ from standard herbie?

I have standard herbie method setup on another tank in an HOB overflow and its dead silent, no durso, just straight pipe.
 

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This sounds realistic. The water will find equalization at the back through the 1" hole, so it will work.

The bean animal method I believe requires three pipes instead of two, but quieter and offers a bit more control and never needs to be adjusted over time as things get gummy and munged up(<--- Technical terms).
 

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Discussion Starter · #5 ·
After looking it up i see how it works. Bean animal is basically the same idea as herbie but from what i see its like you said Gatekeeper, requires 3 holes through the glass and is setup inside the overflow box in the tank and not out of the tank like im proposing.
 

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After looking it up i see how it works. Bean animal is basically the same idea as herbie but from what i see its like you said Gatekeeper, requires 3 holes through the glass and is setup inside the overflow box in the tank and not out of the tank like im proposing.
But there is no reason that you can't do it on the outside box either. The third riser I believe is only a fail safe overflow.

The box on the back is technically just adding volume to the tank. Period.
 

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I'm not familiar with modified herbie or bean animal, how do they differ from standard herbie?
I'm afraid I didn't have a specific modification in mind, I was thinking you might be able to figure out a way to modify the ideas in those methods to suit your situation.

However, that was kinda assuming/hoping that you had more than one hole to work with. I think with just one hole, you're prowly best off doing what you were talking about in the first place -- overflow inside, collection box outside -- and plumbing the outside box in whatever way seems best suited to the rest of your set up. :smile:

In any case, as Gatekeeper says, there's no reason that the Bean Animal or Herbie system couldn't be set up inside your notional outer box: have a look at what they did here.
 

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Discussion Starter · #10 ·
I like the Bean Animal method, but since i only have one hole through the glass my flow rate is limited to 1, 1" drain. So i don't think i could make it work unless i used 1/2" pipe or something. so i just going to stick to herbie method with one main and one back up drain.
 

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I like the Bean Animal method, but since i only have one hole through the glass my flow rate is limited to 1, 1" drain. So i don't think i could make it work unless i used 1/2" pipe or something. so i just going to stick to herbie method with one main and one back up drain.
I agree to a point. There would be a limit, but this would also depend partially on the size of the reservoir box.

You can use 3/4" PVC also which would help this. Ultimately, I think it would be fine.

You could always drill more holes! :)
 

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Discussion Starter · #13 ·
This works! i built a box just like my diagram and i now have a working through the wall HOB overflow
 
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