[jay79]

Please help me silence my Aqueon HOB overflow box

[KathyC]

Can you post a pic of how you have it set up?

You might try dialing back your return pump a little bit and slowing the flow running through there.

[jay79]

I would but I can't figure out how to from My phone but I can tell u I have a 500gph return pump with about 4 feet of head room which would be 425gph I don't have a valve in line with it. On my overflow I have a ball valve on each of the drains. The overflow is a aqueon model 220

[skene]

There are ways of silencing them... but.. which is the best way for you in the question... best google it and read about it more first.

[jay79]

I did I saw a couple of standpipe designs wasn't sure if that was best

[jay79]

Beautiful tank by the way

[dennis]

pics will help, and you may need to just add a hose line to introduce air to break the full siphone, witch has to be tuned to work silently...
but pics will help me to try and give you a solution.

[jay79]

They won't upload to mu CPU for some reason but I'll try to explain the best I can,
From my overflow I have two drains a ball valve on each that goes to 3/4 tubing on each to a Tee that goes to the muffler on the sump the return is about 425gph

[skene]

Do you have a space of air in your "U" tube?
if there is what you want to do is remove that air.
so what you want to do is mod the u tube...
Like so

[jay79]

I do have space in my "U" tube now as for drilling the hole I'm guessing small air line tubing at the top of the "U" tube