Loud overflow.. Lengthen drain pipe?

[Biff0rz]

Took a video of my overflow (herbie) , see below. It's quite loud, I assume the only way to make it quieter is to extend the length of the main drain pipe?

About how much lower than the overflow do I want it? It's currently at 6" below the water line.

 

[Breadman03]

It looks like the noise is coming from the waterfall into the box. I’d try choking down the siphon line until it is fully submersed.

 

[Biff0rz]

Yea the line is fully open in this test. Closing it would raise the water level, right? I'll have to be careful how much I close it.

 

[GlassMunky]

Yea the line is fully open in this test. Closing it would raise the water level, right? I'll have to be careful how much I close it.

The whole point of a herbie drain is to have a full siphon drain so that it’s quiet. And in order to do that you have to shut the drain to match the speed of your return.
You also need to have a second drain pipe as an emergency in case the main gets blocked

 

[KStatefan]

 

[Biff0rz]

Right, this is exactly what I followed.

 

[KStatefan]

Right, this is exactly what I followed.

Your waterline in the video seems to be way below the emergency.

 

[Biff0rz]

Your waterline in the video seems to be way below the emergency.

It definitely is. Which is in line w the other reply, I probably need to close the valve a bit to raise the line. I'll try that today and reply back.

 

[GlassMunky]

It definitely is. Which is in line w the other reply, I probably need to close the valve a bit to raise the line. I'll try that today and reply back.

Yea most likely.
make small adjustments and wait about an hour or so to give everything time to settle and even out before deciding to go further or not

 

[Biff0rz]

I'm tweaking it now. If the water starts to go down the emergency it's too high, right? Or should it barely trickle down it?

 

[un5tab1e]

A trickle down the emergency is fine.

 

[Biff0rz]

Cool, here's where I'm at

 

[Biff0rz]

Btw instant regret not installing a gate valve vs a true union ball valve lol. Does anyone know if it's possible to swap the ball valve with a gate interchangeably? Fine tuning the drain is a pain lol

 

[Snoopy 67]

You could try BUT the valve has to be from the SAME MFG. Otherwise a good chance the threads will not match. Or, just cut the ball valve out & replace.
When done pipe into sump no more than 1" under water.

 

[Biff0rz]

You could try BUT the valve has to be from the SAME MFG. Otherwise a good chance the threads will not match. Or, just cut the ball valve out & replace.
When done pipe into sump no more than 1" under water.

I'm using a clarisea roller and the pipe goes about 6"+ down into the sump. The clarisea sits 8" below the water line - that's where the incoming pipe on it is supposed to be. Any reason why you say only 1"? I assume siphon reasons?

 

[Breadman03]

I'm using a clarisea roller and the pipe goes about 6"+ down into the sump. The clarisea sits 8" below the water line - that's where the incoming pipe on it is supposed to be. Any reason why you say only 1"? I assume siphon reasons?

The siphon will have more and more difficulty purging air from the line as you go deeper, and I’m not aware of any benefits of going deeper once the line is submerged and not splashing anymore.

 

[ReefBeta]

I'm using a clarisea roller and the pipe goes about 6"+ down into the sump. The clarisea sits 8" below the water line - that's where the incoming pipe on it is supposed to be. Any reason why you say only 1"? I assume siphon reasons?

The water between the two pipe will all be in sump when return pumps are off. So people like to not keeping the difference too much to avoid dumping too much water in sump during feeding mode etc.

 

[Snoopy 67]

With the roller there is no choice. The shorter depth is to make it easier to purge any air in the line.
I put a piece inside the overflow box to quiet the splash from the height difference in water levels.
Takes a little "fiddling" but it works great for the noise. Put it in on a slight angle so water backs up onto inside of the box eliminating the cascade into the overflow.