Need Advice to Quiet Things Down...

EricTheRed

EricTheRed

No, I'm not a communist..
So my return line is making a constant gurgling sound and i can't get it to go away. This is not the "flushing" issue rather a constant bubbling/gurgling as the water pours into my sock. I put a valve on the return line to slow down the Mag 12 but I can bring it down to all but a trickle and it still does it.

Any advice to make this quiet would be greatyy appreciated. I thought about drilling a hole and inserting a few inches of PEX 1/2" rigid tube so the air bubbles can vent. Similar to what I did on the top of the overflow to avoid the flushing. Not sure what else to do or if this would even help

Here are a few pics and also a youtube video so you can hear it for yourself.

You'll need to turn your speakers way up to hear it...

http://youtu.be/iTemfIAtKc0

I notched a few slots in the pvc coming down from the sump's bulkhead as I heard that was supposed to help, not sure if I should cut some more grooves in it...



Just a simple grey flex tube from the tank to the sump...



here's a top-view of the overflow



here's a side-view of it...



Thoughts? Suggestions? Questions?
 
The problem with partial siphon, ie durso, is too much air can still mix with water, creating gurgling noise. Slowing down your return pump actually is allowing more air to get mixed with drained water. More water draining will be better until durso quiets down. The air hole on durso might be too big, allowing more air to mix with water.
Its not too late to switch to Herbie drain, which uses a full siphon and silent if tuned in properly.


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I had that issue i drain was to fast for pump so i slowed drain down better super quiet since for over a year also i turned my 90 degree elbow on my drain pipe to a angle instead of straight down basically that piece in u last pic turn it to a angle i tried slits in my buddys tank other day didnt help any lol. We put a 45 angle on the end of the pipe u slotted so the water came out different some times straight down the water gets forced back up into pipe creating bubbles
 
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The other problem with air bubbles is saltcreep. I have zero airbubbles with herbie drain and no saltcreep :)


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ReefDweller said:
try to drill couple more holes on that elbow below the water line, make sure this holes would not suck air above.
Click to expand...

Are you talking about the elbow on top of the return? So if I understand you, you're saying to drill more holes below the one that is already there, right?
 
ColaAddict said:
The other problem with air bubbles is saltcreep. I have zero airbubbles with herbie drain and no saltcreep :)


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Click to expand...

So I just did some reading on the herbie and I'm not 100% sure how I would do it. My 90 has a corner over flow with 2 drilled holes. One is the drain and the other for return. If, for herbie, I used one for drain and the other for emergency overflow, would I just run the return line externally up the back to the tank? This would seem easier than attempting to drill a 3rd hole, which I don't think there would be room for anyway.
 
This is probably a noobish response but my return pipe is adjustable in height. I adjust it to get it silent. I have a similar set up to yours. Perhaps purchase an adjustable pipe?
 
Yes. You can try what mai did. Basically another durso where your water comes out and air can escape from a hole or another pipe.


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That is similar to what I was thinking originally but since i didn't hard-pipe it I thought I'd drill a hole in the top of this elbow and run a 1/2" piece of pvc right out of the top, like a chimney. Think that might work?

 
EricTheRed said:
I've decided to hard-pipe it and go the way of the herbie. Thanks, everyone, for your suggestions.
Click to expand...

It will make your life alot easier if you use a gate valve instead of a ball valve. Gate valves are easier to tune in. I tried using ball valve and it was terrible.
I bought my gate valve from BRS. I couldnt find any locally.


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I noticed that the flex line dips a bit below the elbow at the sump. Eliminating that dip will definitely allow for a lot less gurgling. Of course a herbie is the way to go for silence. I use flex (corrugated) with a herbie design and It Is exactly silent.
 
fit said:
I noticed that the flex line dips a bit below the elbow at the sump. Eliminating that dip will definitely allow for a lot less gurgling. Of course a herbie is the way to go for silence. I use flex (corrugated) with a herbie design and It Is exactly silent.
Click to expand...

Thanks, I didn't mention it but the first thing I tried was lifting the flex line but it didn't work, it still was sucking air and gurgling. On your setup, did you just install a valve buy cutting your flex in half and adding it inline?
 
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