Sump Burping-HELP

[fio1022]

Hi All,
I'm in the final stages of setting up a 120 rr tank.Just finished a fresh water test run.After a few minor leaks , everything is now ready.
I have a problem with the drain lines burping into the sump.Sucking too much air.No matter how I adjust the duroso pipes it still burpes.The only thing I'm able to choke down the flow to the return lines.
Very good flow but too much air.
How do I overcome this?

 

[pecan2phat]

fio,
Principle of a Durso is that it mixes air with the water so that you don't have a toilet effect.
In essence, you will always have air with a Durso drain. Try raising the outlet above the sumpwater line and have it dump into a filter sock or a bucket of live rock rubble.

 

[Reef Junkie]

What Warren said.

 

[onegreenray]

ditto