1 drain hole 1" let me post a pic

Do an external durso for that setup and it should quiet it down a bit.

any places i can get an idea on how to do this?

pictures towards bottom here

how exactly would i construct that for a design such as my over flow box? since i already have the initial pipes set up.

I kinda got a different problem, my drain is quiet, but when it drains into the sump, its noisy, with the air and all. Any ideas there?

heres a pic of my overflow plumbing

http://i7.photobucket.com/albums/y25...cH/Photo29.jpg

Trigs, try a elbow pointing down in your overflow box. Cap the pipe above the tee on the outside, then starting with a small drill slowly go larger until the level in the overflow becomes steady and the drain quiets down (can also use a air valve). Once tuned, the air your pulling through the drain is at a minumun, you'll still get some gurgling but that's the nature of this type of standpipe.

For zero gurgling all I know of is the Herbie style but to be safe, they require two holes for drains.

Here's a variation on the Herbie, with layout out similair to what you have already.

I'm not convinced a third run is necessary but guessing I don't fully understand it.