Drain pipe diffusor.

[gregzz4]

Is your drain submerged in your sump ?

If so, what about a piece of acrylic with a hole cut out for your drain, to block the bubbles ...
This is my main drain ( submerged ) and emerg ( with a trickle showing )



If you are sucking air down your Durso I can't be much help

[monocus]

defiantly submerge your drain 1" into the water and i switched my durso to a stockman-takes up less room.

[soapy]

I like the looks of these designs:

http://glassbox-design.com/2009/snm-...reduces-noise/

It looks like it would be pretty easy to build one.

[Seth81]

Originally Posted by gregzz4

Is your drain submerged in your sump ?

If you are sucking air down your Durso I can't be much help

Yeah if you are sucking air into your drain then you will have to try to get rid of the micro bubbles somewhere else in your sump ( I sugest filter floss in a baffle).

If you aren't sucking in air then a submerged drain would be the best.