So I have been using this for years to rinse, wash and sanitize my kegs. Its fast and easy. Fill the keg about 25% with water using the household water pressure you get to fill and drain through the "beer out" and really save yourself some time.
I will also add a tad of PBW and Star San and wash and sanitize my kegs with this method as well without taking them apart. I have been doing this for years. I will take my kegs apart about every 2nd or 3rd batch depending on how long the beer was in the keg, but all in all its a fast and easy way to wash and rinse your kegs and the draw tube, without having to take them apart every time.
We did a quick video on how it works. Let me know what you think. Its like the 4th or 5th video down from the top.