You are missing several steps. There are several threds on this subject. Just scroll to the top, tap that search word and enter winterizing. It should list several emails to read. The inside filter bowl will need to be empited. The outside shower flush faucet needs drained, the waterheater needs to be placed in by pass and most importantly the waterlines themselves need either blown (45psi) clear or filled with RV antifreeze. Do you have a aircompressor? It doesn't have to be a big one. If you can get/borrow one I feel its the best. A special adaptor fits in/on the citywater connection and you start farthest from that connection. Open or flush toilets at each until air is the only thing that comes out. Then do it again, don't forget the outside faucet. P-traps need RV antifreeze but you got to get that waterheater in by-pass first. After you think your done don't forget the filter and bowl. Again, please read through the winterizing search coloum.
Don & Dona W/yorkies Gizmo, Master Chief, & Tali
2011 Flagstaff 8528 BHSS 2015 Ford 6.7 XLT
2010 Full Timers & Still Going