How to silence 90 degree drain?

[ps2cho]

i have a thin overflow box that I cannot fit any fitting into.

The drain is a 1" bulkhead into a 90 deg pvc bend and it's sucking in air and gurgling like crazy.

How can I eliminate the gurgling with this (already glued) 90 deg PVC drain?

 

[RyanCSGO]

i have a thin overflow box that I cannot fit any fitting into.

The drain is a 1" bulkhead into a 90 deg pvc bend and it's sucking in air and gurgling like crazy.

How can I eliminate the gurgling with this (already glued) 90 deg PVC drain?

Is there a hole at the tom of the elbow? (above the down pipe)

 

[ps2cho]

No. I wanted to figure out the best way before I started messing around

 

[RyanCSGO]

No. I wanted to figure out the best way before I started messing around

mine looks like below.
the circle is a hole that was pre drilled on either side.
the red line is a hole with a tube sticking out of it to allow air flow.

after tuning my return flow a little bit, i opened up the hole with the tube a little bit and it eliminated the gurgle i had.

 

[ps2cho]

So just drill a hole in it and stick some tubing down it and it's good?

 

[ReelRednekReefer]

Mine is just like Ryan's. Only difference is i used a airline valve in the hole to fine tune the air flow, which is honestly runs full siphon now. You could try without drilling the hole first and see if it works for you.

 

[RyanCSGO]

So just drill a hole in it and stick some tubing down it and it's good?

so, yes there is hope that it could be that simple.

But be aware, it may take some fine tuning after the fact.
If this is route you choose to go start with a small hole and gradually open it up a little at a time as needed.

what is your return flow like? if you have a valve on the return then you can tune the flow a little to adjust as well.

I like what @ReelRednekReefer said with the air line and valve. Same concept as most skimmers, would make the tuning even easier and more precise.

 

[ps2cho]

The difference for the photo is that I cannot put another elbow in the overflow box as its a slim style so I just have an open bulkhead

 

[zoomonster]

Some good answers but lookup a durso drain which are near identical. The durso just has one hole on top though. My DSA came with 3 of them and they do have a tendency to whistle when new. I used to have small pieces of airline in the hole to silence but I don't need them anymore.

 

[kateater]

So just drill a hole in it and stick some tubing down it and it's good?

I drill a 1/4 hole and use airline tubing. I place a airline "T" to fine tune it the airflow.

 

[RyanCSGO]

The difference for the photo is that I cannot put another elbow in the overflow box as its a slim style so I just have an open bulkhead

snap a picture when you can, just want to make sure the picture in my head is the same as your describing.

 

[kateater]

snap a picture when you can, just want to make sure the picture in my head is the same as your describing.

Mine is covered up but here's a pic from Google

 

[zoomonster]

Couldn't find a good pic but had this one from when I built the tank. That one flipped up is my emergency overflow and it shows the perforated pipe section, each have, that is helpful for noise and things getting sucked up. The only other thing of note is these are not glued together and all the pieces come apart for cleaning. Once broken in those holes stopped whistling and prior to that had pieces of airline tubing inserted.

 

[ps2cho]

I drilled a hole and it made no difference. The noise is coming from the top of the bulkhead where its sucking air.



What's the fix here?

 

[Bichito]

I drilled a hole and it made no difference. The noise is coming from the top of the bulkhead where its sucking air.



What's the fix here?

Hello, did you finally get a solution for this?

Im having the same exact problem

thanks in advance