Silent overflow plumbing design?

[justslothy]

I just bought a 90 gallon corner flow drilled in the bottom from a local reefer. The design he used was with 1 1/4" pvc, a T standing about 6" off the bottom to drain the water, and another 2' of pvc going off the top with an elbow to act as a muffler (see pictures for reference, sorry if they're hard to see). He said it was silent but I feel like you'd still hear gargling from the water draining in. I thought of using a durso but I have no idea how I could fit one in there, the space is really limited unless I use smaller tubing. Any ideas on what I can do?

pictures: http://imgur.com/a/3Wc11

 

[Tang Salad]

That's an interesting approach. I can't imagine that would be quiet, between the water falling and probable gurgling.

I think you could still fit a standard Durdo in there. Just get a longer piece of 1.25" and have the center of the Durso's horizontal section be an inch or two below the overflow teeth.

 

[Young347]

I am also not sure how quiet the system will be put it up and try it out if it's not I would cut the middle section out and like tang said put straight pipe all the way up then do a T fitting and a 90 and then cap the top and drill a small hole for air and it will be quiet with a suite trickle sound like a waterfall

 

[sleepydoc]

Never seen that design before. Like the others above, I question how quiet it will be, even when working 'as designed.' Best case it seems like you would have water splashing 15" over the overflow and then gurgling down the drain.

Are there any other holes drilled? How is the rest of the system set up? Like Tang Salad said, you may be able to covert it to a durso. Depending on the amount of flow you're aiming for, that may or may not work. The other problem with either of these options is that they have a single point of failure - if the single drain pipe gets clogged you've got a flood.

Off hand, the other options I can think of would be to drill a second hole and make it a Herbie, use the bottom hole for a return and add a coast to coast baffle, drilling the back of the tank to make a beananimal overflow. This is the most work, but the bean really is the Cadillac of overflows, IMO.

 

[justslothy]

I feel irresponsible for abandoning this thread, had a busy week. I think I'll go ahead with a durso in there since it's the easiest option which still serves my purpose well. There seems to be enough room for a street ell and 1.25" pvc so I should be fine. Thanks for the input guys.