I always get a chuckle when I see these posts; and the extents that some will go to to put water into their tank. If your RV has a winterizing valve, then you already have everything you need. Simply turn your City/Fill valve to "Fill", and turn your winterizing valve to "Winterize". Drop the winterizing line into a bucket of water and turn on your water pump. Your onboard pump will draw the water into the lines and then push it into the freshwater tank. Refill bucket as needed.
If your RV doesn't have a winterizing valve, you can add one for less than $15
here.
