I dump the cleaned brass, pins and dirty water into those I think 5 gallon pails you get at home reno places for a few bucks with one of the Frankford media separators on top of the pail. Looks like this:
http://media.midwayusa.com/productimages/880x660/Primary/731/731116.jpg
All the brass stays in, but the dirty water and some pins fall through the separator. But what I did was drill 2 1" holes in the side walls near the bottom on opposite sides, and glued metal screens over them with some epoxy. Something like this, aluminum mesh for screen doors: http://www.homedepot.ca/product/black-aluminum-screen-36-inch-x-84-inch/981589
So the water flows right through the Frankford separator on top of the bucket, and the screens in the bottom of the bucket. The brass gets caught in the separator over the bucket. Since I only reload pistol (straight wall cases), it doesn't take much at all to get all the pins out of the brass. Just a little shaking of the separator top. Might take some more shaking with necked cases. I do this in a large washing basin with a hose attachment on the faucet to rinse everything out. With the screens, all the water just keep running through, and after literally 2-3 minutes of work at most, the pins are in the bucket and cleaned, the cases are in the separator and cleaned. I spread out the cases for drying and I run a magnet in a ziplock over everything. At most I might find a pin or two every load that didn't fall out from the separator. And this is also a good time for me to screen for any suspect cases, or cases with bent lips I might want to ream out first before running through my sizer, or any other case that might need a little case prep like the primer pocket, etc. I spend more time on the spreading out, magnet, and inspection of cases than I do on separating the dirty water from the pins and cases.