I already winterized this season but this was a project I wanted to get done for the future. I'm wanting to avoid having to pour RV antifreeze in my fresh water tank to winterize my potable water lines, pump, valves etc. I just don't like it sitting at the bottom of the water tank all winter long. I've already installed plumbing to bypass the water heater with a couple diverter valves before I winterize. This just completes my winterization process: I have used the same diverter on the main supply line after to water tank so I can draw antifreeze into the system without the tank. I also replaced the PB line with PEX. The before and after pictures are taken in the floor, just in front(behind?) of the V berth. There's a removable floor panel that just lifts up. Once the tank is drained of water, I turn the diverter and draw antifreeze from the jug. The clear line stows in the small space when I'm done. I tested it and it all works as expected.