Overflow Problems....External Durso.

[racer69]

I am haveing a real problem making my new 33gal overflow quiet. It was drilled about 2" from the top of the tank and an overflow box glued around it. I have the Durso attached behind the tank and the tubing running straight down into the sump. I have tried all different sizes of holes in the top plug, and am still getting a flushing sound every 2 minutes. Can anyone think of something to help me out here?

 

[ReefJerk]

Are you getting back pressure where the overflow meets the sump water? If it's too deep, air can get trapped and the 2 minute flush could be what's happening when the pocket breaks. You can try a reverse Durso where the overflow meets the sump.

 

[racer69]

Cliff, are you saying to put a durso at the top of the sump. Maybe put a piece of pvc into the sump and connect a "T" at the top with an elbow going up to the vinyl tubing. Would you drill a hole in the top of the "T"?

 

[murfman]

Todd, I think these are reverse Dursos in this thread, 4th and 5th pix.

http://www.reefcentral.com/forums/showthread.php?s=&postid=8666281#post8666281

 

[calvin415]

Todd, did you drill the hose going into the sump? The air is getting trapped and needs to escape easier...

 

[racer69]

Eric, yes I drilled several holes and it didn't help. However this afternoon I did add a strainer to the overflow and changed the diameter of my hole and things have quieted consideably. I dialed down the return pump a little also. Thanks for the replys guys.