So this is nothing too new but my implementation of a corny keg washer.
Essentially I took a 5 gallon bucket, Superior Pump 1/3 HP, adapted it from 1 1/4" FNPT down to 3/4" slip and run 3/4" PVC to a 1/2" TC which I use my interchangeable rotating spray nozzle on (I say interchangeable because I use one nozzle for all CIP - it's connected to a TC adapter I can use for my conical, pots, etc etc). It's designed so the spray nozzle is almost at the top of the keg when flipped upside down for full coverage. The liquid flows back in via 5 2-1/4" holes drilled in the lid and the corny has a open gas and liquid ball lock connector to let any accumulated liquid back through.
So my basic CIP program is:
1) Cold Rinse
2) PBW Hot
3) Hot Rinse
4) Flush with filtered air
5) Star Sans Cold
6) Flush and Pressurize with CO2
With this setup I can run 6 kegs with just a couple of gallons of solution in a coupe of hours. Saves so much water, time and effort. Hope someone finds this useful! More pics upon request.