Need Advice to Quiet Things Down...

I had/have the same issue. My overflow didn't allow for a herbie so I couldn't do it. However, I've seen a couple herbie setups and they are "silence ... I keel you".
 
on my herbie, i used the corrugated tubing as the emergency drain and put a gate valve in line with the other drain, using vinyl tubing. I put it a few inches below the nut and had about 6 inches of tubing after the valve into my sump. pretty silent.
 
I had this same issue before with my Durso. It would gargle, bubble alot, and the water would drop in the overflow and then go back up. After a month or the drain was silent. All you hear now is the water shooting out the anti-siphon hole in the return.. I was told if its a new setup you have to let it slime up a bit..
 
I have a bulkhead installed on my overflow. To which I welded pvc pipe, a union, a gate valve, another pipe and then the flex. The flex fits so snug on that pipe that I need no clamp. This runs to the sump, perhaps only 1 fott of flex, and terminates under the surface of the water in the sump.

The emergency drain is similar except no gate valve. On the emergency drain I have a section of pipe in the overflow box that then makes a 180 turn down. This part Is not welded. Water trickles through this drain and this pipe needs to terminate above the surface of the water in the sump.
 
Just curious, sorry to hijack the thread. I have a durso standpipe, 1.5" drain. After the drain, it splits into dual 1" hoses that go to my sump. The only noises I ever really hear are the actual sound of water moving throughout the hoses. No gurgling, no air, just water movement. Would switching to herbie change this, or is the water movement sound pretty normal? And if I wanted to switch to herbie, how would I do it?
 
So it sounds like a lot of people have had success with a herbie using flexible tubing and not going the hard-pipe route...

Thanks for the input everyone!
 
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