Also if you click on the video section in the site Wayne and Arlene gave you, you will find a video on winterizing your unit too! It's relatively easy especially if you have the bypass kit installed in the unit and the winterizing kit at the pump! Yours may be different because what I'm stating is for my 2004 unit. The newer units may have all this installed already. You can do it two ways(actually three)--the air method or the pink stuff (RV antifreeze) method or the combination of both! I've used the air method for the first time this year and we'll see how it works! If you use the air method you still need to buy the pink stuff and put it in your traps and in the stool so they don't freeze or dryout! It took me twice as long to use the air method than it did pink stuff method but that may have been because it was my first time doing it that way!