CPR overflow noise

[jballa15]

I purchased an overflow from someone on ARC a few months ago and just set it up on a 30 gallon. The sump has a mag 5 moving up about five feet of head pressure and about four 90 degree turns. The drain has a homemade (previously) "durso" pipe attachment that pulls the water over a bend to reduce the air noise, but the thing is still really loud. I looked at the CPR forums and found that the overflow originally comes with an adjustment tube to ket the air escape. I was wondering if anyone has suggestions to make a homemade air escape or modification to the drain? I am going to attach a ball valve and reduce the mag 5 flow a little and cover the back of the overflow. Thanks, John.

 

[xyzpdq0121]

Ya, you should be able to drill a 3/15th hold in the top of the durso and hook a piece of airline tube in it will a air valve in it... You can open and close the valve till you get the right mix.

 

[wbholwell]

Wait 'till you install the ball valve, though. That might correct the problem.

 

[jballa15]

So if I add an airline, should it be barely inside, a few inches down, or does it not matter with the valve? Thanks for the advice, ill try next week when I have a break at school and post the results.