Hey Roger,
I'll speak for the sankey keg cleaning and filling:
You'll pretty much need a dedicated sankey coupler depending on the coupler. This is because you'll need to remove the check ball and ball guard from the top (liquid out) of the coupler. You also need to remove the rubber check valve from the side (gas in) of the coupler.
So with both removed, you can fill a sankey keg, allowing the excess pressure to release out the gas port of the coupler.
To clean a sankey keg, hook your recirculation pump up to the top (liquid) of the coupler and turn the keg upside down. Cleanser will go up the dip tube, hit the center of the keg, and flow down the sides and out the side (gas) port of the coupler....let it run 10-15 minutes and you should be good....repeat with fresh water. Use real hot water for your cleaning and rinsing, then cold star san for the last rinse.
Hope that helps.
P.S. try to stay away from chlorine based cleansers for stainless if you didn't already know. use powdered brewers wash or a cleanser with a high alkalinity.