Help needed in trying to quiet my overflow

[TehBrainz]

I have a ~230g system between the DT and sump. Dual overflow with two emergency drains. I currently have no restrictions on the overflows and they are rather loud. I have each overflow at the same height, but they are adjustable.

Am I able to add a gate valve to the long run shown in the second image and raise the left overflow drain to act as a herbie overflow?

Current Overflow

Proposed Overflow

 

[blaxsun]

You could just add a gate valve to each, no?

 

[Pntbll687]

You would need to add a gate or ball valve to both drain lines. You need to create a full siphon in each line to quiet them down.

here's a really good video on how it's done

 

[TehBrainz]

You could just add a gate valve to each, no?

Ideally, yes.

When I set up the system originally, I didn't put enough forethought into the design and I don't have enough room to easily set a gate valve up on the left overflow

 

[Pntbll687]

Ideally, yes.

When I set up the system originally, I didn't put enough forethought into the design and I don't have enough room to easily set a gate valve up on the left overflow

If you physically can't get a gate valve on the short side, you'll have to put the single ball valve in, and then play with the flow rate to get a full siphon on the other side.

if the drain is in the 3/4in hole, you'll need actual flow rate of 660gph or more flowing into the pipe to create the siphon. Probably more, I'd say around 700gph to get a full siphon and keep the overflow level near the top. You may run into noise coming from water splashing into the overflow box if the water level isn't high enough

See the first chart on this link for some pretty accurate flow rates

How Much Water Can Flow Through A Pipe (GPM/GPH)?

Three tables to get a general understanding of water flow capacity through a pipe or roof drain. If you have questions, contact our roof Drain Wizard.

hy-techroofdrains.com

 

[TehBrainz]

You would need to add a gate or ball valve to both drain lines. You need to create a full siphon in each line to quiet them down.

here's a really good video on how it's done

Where was this video last summer when I was setting up the system?!? I mean, it was still on youtube at the link since thats from 2016....but still...

If you physically can't get a gate valve on the short side, you'll have to put the single ball valve in, and then play with the flow rate to get a full siphon on the other side.

if the drain is in the 3/4in hole, you'll need actual flow rate of 660gph or more flowing into the pipe to create the siphon. Probably more, I'd say around 700gph to get a full siphon and keep the overflow level near the top. You may run into noise coming from water splashing into the overflow box if the water level isn't high enough

See the first chart on this link for some pretty accurate flow rates

How Much Water Can Flow Through A Pipe (GPM/GPH)?

Three tables to get a general understanding of water flow capacity through a pipe or roof drain. If you have questions, contact our roof Drain Wizard.

hy-techroofdrains.com

This may be my first attempt to see if I can quiet everything down. If this doesn't work or even makes the tank louder, I could fully open the valve and work to see what I can do to get closer to the video.

I only have access from the front of the stand and with livestock in the tank, I'll need to be a bit more sure about things before making major changes, but these options give me some hope!

 

[Pntbll687]

Where was this video last summer when I was setting up the system?!? I mean, it was still on youtube at the link since thats from 2016....but still...



This may be my first attempt to see if I can quiet everything down. If this doesn't work or even makes the tank louder, I could fully open the valve and work to see what I can do to get closer to the video.

I only have access from the front of the stand and with livestock in the tank, I'll need to be a bit more sure about things before making major changes, but these options give me some hope!

I found that starting with the gate valve fully CLOSED made it allot easier to tune the full siphon drain.

You start with it closed, turn the return pump on. All the water starts going down the emergency drain and is really loud. Then start opening the drain until it starts to quiet down. Then check the water level in the overflow box, and adjust the valve as needed to get the right level.

When I started with the drain open, I found it really hard to fine tune at the end to get the right water level in the overflow.