Noisy overflow box and flow help

[Cesar Romero]

I just installed the synergy overflow and for 20. I’m testing the plumbing, which fortunately I have no leaks so that’s, however I can seem to get the noise low or preferable gone. Here are some pics of my current set up. What do you guys use for pvc sizes for the internal box? Is my water to high or low?

Also with the the cor 20 any recommendation on what flow speed to have set it at to start? Eventually I would like 1500 flow for the triton method. But I think the speed makes a difference for the noise.

Any help on what worked for you to get it quite would help!

 

[miPapareef]

Good looking setup.

Water noise comes from these:

• Water falls. Bigger falls is more noise. Check the water going over the weir from DT. Try raising the water level in the overflow. I had this problem at the recommended stand pipe hieghts. So I raised the secondary pipe up. Also check all the drops between sump chambers.
• Water turbulence in pipes or causing surface agitation. Make sure the full siphon line is full of water without trapped air and not sucking any air. The U shaped pipes in that overflow have holes on top so it needs to be well below the water surface. Also the secondary should have just a slight trickle of water. You have long vertical drop in that secondary that makes a sharp right corner. Any splash there will be loud. Just turn the full siphon gate valve to get the secondary at a trickle.

 

[Cesar Romero]

Thank you for the help. I have played with different secondary height, but seem to run the same problem. So both U shapes have hole on the top, the way they came. The full siphon line doesn’t seem to stay below the water line, even though the secondary line is higher. If I cover the hole on top for the primary it creates a full siphon, yet drains the water on the box quickly and when I let it go it for a few seconds as the water raises is perfectly quite. Also should I be able to hear the water from the display entering the box? By any chance do you know what size you used for the pvc lengths for The U shapes?

 

[miPapareef]

The full siphon line doesn’t seem to stay below the water line, even though the secondary line is higher.

If the full siphon is not staying below the water level you can either increase return pump flow rate or further close the gate valve on the drain. Just to check, you have the lowest U pipe on that center drain line that goes to the gate valve. Right? That’s the primary drain line if so.

 

[legionofdoon]

Pull the U off your secondary drain and adjust it to barely trickle down. That's what I did. The secondary when it had the U on it would pull a full syphon and drain the box to far and the the main would lose it's siphon.

 

[legionofdoon]

Here is mine

 

[miPapareef]

By any chance do you know what size you used for the pvc lengths for The U shapes?

I don’t remember the lengths but it looks like this.

The water level in the overflow should get close to the top of the 2 holes through the tank.

 

[Cesar Romero]

If the full siphon is not staying below the water level you can either increase return pump flow rate or further close the gate valve on the drain. Just to check, you have the lowest U pipe on that center drain line that goes to the gate valve. Right? That’s the primary drain line if so.

Correct, my lowest U pipe is the center drain, right is secondary, and far left is emergency line.

 

[Cesar Romero]

Pull the U off your secondary drain and adjust it to barely trickle down. That's what I did. The secondary when it had the U on it would pull a full syphon and drain the box to far and the the main would lose it's siphon.

I haven’t tried that, I’ll give it a shot

 

[Cesar Romero]

Thank you both for the ideas and the pictures help give me something to aim for, appreciate it! I’ll keep playing around with it

 

[Cesar Romero]

Just wanted to share my findings thus far, I tried both of your recommendations and it is ALLOT quieter, which is awesome. I don’t even hear it anymore running down the pipes. The only thing I hear now, is the water going passing through the display box, kinda like a small trickleling. Kinda looks the water is at the midway teeth of the display box entering. Any ideas on how to eliminate that noise? Thanks again for your helps!

 

[Cesar Romero]

Oh hears a pic of what it looks like currently

 

[miPapareef]

I’m glad to hear it’s getting better.

Any ideas on how to eliminate that noise?

The less waves in the DT the quieter it will be. The only other thing is the keep increasing the water level in the overflow box by raising that secondary pipe.

Just watch out not to get it too high. If the primary should plug than the secondary will need to be low enough to go full siphon or you could flood out the top of the overflow box.