Getting a synergy overflow quiet?

[lbacha]

Are you running the synergy overflow? I have my pumps down to probably about 1500g right now.

The synergy V3

 

[OutColdCRNA]

We have steps in the right direction!!! So much better! I pulled one half of the two 90’s ,on the secondary, off to raise the level. This helped. Then I had the idea to silence the waterfall. The majority of noise is from the overflowing water through the weir. I went to scrounge through my fish box of random stuff to see what I could come up with. I found a sheet of cross stitch fabric that I had used to DIY an algae scrubber in my AIO. Perfect length and width. Disclaimer, do not remove the weir of the synergy while the pumps are running. I did have some overflow onto the floor before I could shut the pumps down.
Anyway, I cut sections of the cross stitch mesh and rolled them up and placed in each of the 4 sections of the inside front overflow box. Whatya know! Not silence, but vastly better than before. I can actually hear the surface breaking from my returns!
Still some dialing in but we are getting there! This overflow design is stupid!! But my wife is much happier!!

 

[OutColdCRNA]

I am so confused by this overflow today. I have noticed lately that either my overflow is either pulling in air or not draining enough and the tank level is getting high.
So I decided to close up the hole on top of the synergy u tube. When I did this it’s like the syphon went into super mode. Was draining incredibly fast. I have the gate valve on the main drain closed completely minus a 1/4 turn. Even with it closed this much I have had to turn up my main pump exponentially.
I have tried all sorts of things today. I took the u tube and reopened the hole and put it on the secondary line and left the main line open.
Up until this point the gate on the main had been about half closed. I’m so confused now. Considering I have the gate all but closed and it feels like it’s draining faster than ever. No leaks or anything anywhere.
Any ideas?!

 

[ThaBeast]

swap it out for a modular marine or exotic marine, much better design built with better materials.

 

[Dburr1014]

I am so confused by this overflow today. I have noticed lately that either my overflow is either pulling in air or not draining enough and the tank level is getting high.
So I decided to close up the hole on top of the synergy u tube. When I did this it’s like the syphon went into super mode. Was draining incredibly fast. I have the gate valve on the main drain closed completely minus a 1/4 turn. Even with it closed this much I have had to turn up my main pump exponentially.
I have tried all sorts of things today. I took the u tube and reopened the hole and put it on the secondary line and left the main line open.
Up until this point the gate on the main had been about half closed. I’m so confused now. Considering I have the gate all but closed and it feels like it’s draining faster than ever. No leaks or anything anywhere.
Any ideas?!

Sounds like your main drain is not adjusted properly.
So the "u" pipe with a hole should be on the secondary. The gate valve should also be near the sump on the main drain.
Open the main drain all the way and close it slowly until a slight trickle comes out the secondary.
You really shouldn't ever have to adjust this again.

 

[OutColdCRNA]

That’s the way it is configured now. U pipe on the secondary. I started with my primary gate valve opened all the way. In order for it to stop sucking air the valve is now almost closed. That’s the part that doesn’t make sense to me. That it’s still draining so quickly even with the gate valve essentially closed.

 

[OutColdCRNA]

swap it out for a modular marine or exotic marine, much better design built with better materials.

If only it were that easy. Tank is running and he’s an 8’ 240.

 

[Dburr1014]

Do you know how many gallon per minute you're running up to the tank?

So you do have it tuned right. You're at a full siphon with the gate almost closed which makes sense if you're return pump is not that strong. Off the top of my head and I might have this number wrong I think you should be able to get 660 gallons per hour with a 1-in pipe.

 

[OutColdCRNA]

I am currently running a jebao dcp 13000 at 50% and a dcp 8000 at 30% I’m running way more than 660 gph and the gate valve is virtually closed completely. I’m ballparking close to 2000 gph. Still stumped by the fluid dynamics with this.

 

[Dburr1014]

I am currently running a jebao dcp 13000 at 50% and a dcp 8000 at 30% I’m running way more than 660 gph and the gate valve is virtually closed completely. I’m ballparking close to 2000 gph. Still stumped by the fluid dynamics with this.

What size pipe to be sure?

 

[OutColdCRNA]

The drain lines are 1.5 inch.

 

[Dburr1014]

The drain lines are 1.5 inch.

Oh yeah, they handle a lot more flow. This is why you close your gate valve almost to nothing.

 

[OutColdCRNA]

Okay so things I have learned from this experience. Synergy’s customer service is a joke. They refuse to sell a U pipe unless you provide the serial number or purchase receipt of the box. Any rate, A Home Depot 1.5 inch U works just fine. A hole is 100% required in the top of the main line U. Without the hole the box level raises and then drains down the secondary because there is not enough box height to create the syphon on the main line. Okay, drilled a pin hole in the new Home Depot U on the main line. Can adjust box water height as per normal. So after several days of tinkering I am back to where I started. With the exception of of a better fitting U on the secondary line which prevents overflow. So I guess that’s a plus.