Never used our unit yet but we will be using it soon. Currently winterized and will have to winterized after our shake down trip. I have never winterized an RV before and the draining and blowing out of the lines sounds pretty simple. Getting the antifreeze into the lines is another thing. I am the McGiver kind of guy and was wondering if you could pressure feed the antifreeze . Could you take a garden sprayer and adapt it to the city water hookup and then just open the faucets one at a time to fill the lines? Another rookie question concerns the on board water pump. If we only use the city water hookup does water even get into this pump? Probably a duh question but I had to ask. I was told to hook the antifreeze supply/jug to the intake side of the onboard pump to fill the lines but I have no idea where this pump is or how difficult it is to get to it.