And you get let it sit for a few minutes (I do) but some don't even let it sit. Pour it in, stir it up, vorlauf, and run off. I generally add my sparge water, stir well, and let it sit for about 8-10 minutes before vorlaufing. No real scientific reason, though- just what I've always done.
Broken Leg Brewery
Giving beer a leg to stand on since 2006