Durso Style Drain Whistling

[BlueTang<3]

I am kinda lost you added a tee so you had a vent above the water line off your drain? I have tweaked with mine a lot to get it silent. i would remove the tee and just have your drain under water with the venting in the standpipe.

[Lampshade]

There's a thread on RC about the Tee in the sump vented to air. It was someone's anit-herbie thread. But anyways.. seems like it worked for some people, most it didn't. It can actually increase the air if you have enough flow from thew venturi effect. What your hoping to happen with the Tee is that your water is moving slow enough that the bubbles can rise in the flowing pipe out of the Tee. This is not common on most systems because of high flow.

I have my 2 duroso's set up in a semi-herbi method where one is gate valved and has 0 bubbles since it's mostly submerged(going to refugium). The other one pulls in LOTS of bubbles, but it's into my skimmer chamber so i don't mind.

The reason duroso's are quiet at the tank level is because they help the pressure differance(gurgling) by venting the top, adding air to combat the lost pressure from the water falling. A bubble free duroso isn't working as a duroso, it's just full of water.

So technically to make a duroso bubble free you have to balance your return pump/drain lines to have enough water to keep your drains full at all times(making it a herbie). The only issue with this is that if you drain line becomes restricted in any way, you will overflow your tank. That's why the herbie has the emergancy drain.

I threw a filter sock on my skimmer drain line, i wanted to avoid filter socks, but until i drill an extra hole in my running tank it seems like the only option to have 0 bubbles.

[Wayne]

Originally Posted by Lampshade

There's a thread on RC about the Tee in the sump vented to air. It was someone's anit-herbie thread. But anyways.. seems like it worked for some people, most it didn't. It can actually increase the air if you have enough flow from thew venturi effect. What your hoping to happen with the Tee is that your water is moving slow enough that the bubbles can rise in the flowing pipe out of the Tee. This is not common on most systems because of high flow.

I have my 2 duroso's set up in a semi-herbi method where one is gate valved and has 0 bubbles since it's mostly submerged(going to refugium). The other one pulls in LOTS of bubbles, but it's into my skimmer chamber so i don't mind.

The reason duroso's are quiet at the tank level is because they help the pressure differance(gurgling) by venting the top, adding air to combat the lost pressure from the water falling. A bubble free duroso isn't working as a duroso, it's just full of water.

So technically to make a duroso bubble free you have to balance your return pump/drain lines to have enough water to keep your drains full at all times(making it a herbie). The only issue with this is that if you drain line becomes restricted in any way, you will overflow your tank. That's why the herbie has the emergancy drain.

I threw a filter sock on my skimmer drain line, i wanted to avoid filter socks, but until i drill an extra hole in my running tank it seems like the only option to have 0 bubbles.

AH ha thats exactly what I mean! I will post a picture in a few minutes of what I did

[Wayne]

I ended up replacing the pipe that was making the whistling noise with the old one and the noise went away. Heres the difference in bubbles, way more on the the right hand side:

[Lampshade]

Oh wow, that's way better. Nothing's comming out of the Tee, so that's proabbly sucking air in and making it worse. At the top of my duroso I've extended the down spout a bit where the water is drawn in. I threw a 5" piece of PVC on there just to bring the intake below the bubbles entering the overflow, might help a bit, but air's still added in the air holes at the top.

With the tee I wonder if adding a gate at the bottom and a piece of pipe going up would work. And adjudst the gate valve to make the Tee JUST start to flow over. Like this:

Tank
| |
| |
| |
| |
| |
| |
| |....__
| |....| |
| |....| | <Sump Water Line somewhere around here
| |__| |
| ____|
| |
| |
|X| <--Gate Valve
| |
| |
| |

[intarsiabox]

Wayne, have you tried throttling down your return pump? I have tons of bubbles on the intake side of my sump but most are gone before they even get to the first divider. I was having lots of micro bubbles at first getting into the display tank but after tweaking the return pump discharge they all disappeared. My set up is nothing special, just a regular durso pipe with a hole in the top and then another 1/4" hole in the pipe just above the water surface (eliminates surging) and the pipe extends about 3" into the sump water.

[Wayne]

Originally Posted by intarsiabox

Wayne, have you tried throttling down your return pump? I have tons of bubbles on the intake side of my sump but most are gone before they even get to the first divider. I was having lots of micro bubbles at first getting into the display tank but after tweaking the return pump discharge they all disappeared. My set up is nothing special, just a regular durso pipe with a hole in the top and then another 1/4" hole in the pipe just above the water surface (eliminates surging) and the pipe extends about 3" into the sump water.

Just did right now. Definate reduction in bubbles, I of course set it to max and then installed . Seems to help, did you ever get a draining sound when you had this tank?

[intarsiabox]

I did until I drilled the hole in the pipe just above the water line, after that it was quiet. Water does come out the hole though, so if you try it make sure the hole points into the tank.