Noisy Drain Line

[darb]

I don't have any pictures of the actual setup atm; it is no longer my tank but a friends. Below is the type of overflow that I am referring to.



I will snap a photo of my 90 tomorrow as a better example, it is configured exactly the same way.

Yes, the tank is up and running and against the wall and with no chance of an ato in the foreseeable future.

Really not looking to change to a Herbie.

I was hoping that someone might have a few suggestions to deal with the situation as it is. Like I said, it is noisier than the same setup on my 90 RR and I swear that it wasn't that noisy before. Although it got replumbed and I was running flex PVC which may have just been insulating the noise better.

[d33ps3a]

I'm using this. Maggiemuffler.com it is pretty quiet. My Skimmer is louder than the drain.

[makana]

I had the same aqueon overflow, it sounded like boiling water under the stand. I converted it to a herbie and it is silent. It wound up being so quiet I had to replace the return pump because then it seemed too loud.

[monocus]

use a stockman standpipe with a breather valve

[iamfrontosa]

Instead of using the 90deg elbow, maybe the 45deg one might make things quieter.

[Ron99]

Originally Posted by iamfrontosa

Instead of using the 90deg elbow, maybe the 45deg one might make things quieter.

i suspect the noise is more form air being sucked down the one drain line along with the water. not sure changing the elbow would help much. you need a way to balance the flow in the drain.

[darb]

It seems to be from the air that gets drawn into the line at the bottom of the standpipe.

The 90 is glued in; going to try pipe insulation.