1) Fill the bottle with PBW & hot water, and force it through the tap lines
2) Fill the bottle with hot water, and rinse lines
3) Fill the bottle with starsan and sanitize lines
Since getting the Marks Keg Washer, I've been using it to clean my lines (makes life a whole lot easier). You could easily accomplish the same thing with a cheap pond pump, 4 feet of hose, and a ball lock post & short dip tube.
Required Equipment:
-Small pond pump
-Hose barb to screw into pond pump
-Ball lock liquid out post
-Ball lock gas in dip tube
-4' of tubing (ID same as the dip tube)
-Bucket/container to act as liquid reservoir
I follow the same steps (PBW, water, then Starsan), but just let it recirculate for a bit while doing something else. The ball lock post just inserts into your liquid out lines of your kegerator, then open your tap and turn the pump on.
Below is a picture of the setup:





