KF,
1. It recirculates just fine. The pump will actually pump water into the sanke keg faster than it can drain naturally, but as more water gets pumped in the pressure inside builds and pushes the water out at the same rate.
2. You'll want a good amount of solution to start. This is a 10...
I recently started fermenting in Sanke kegs and needed to find an effective way to clean and sanitize them. I started by buying the keg size cleaner from http://www.carboycleaner.com but soon realized that without being able to see inside the keg it was almost a crap shoot if the arms on the...