Newer RVs that are hard to winterize.....grrrrr

Does the city water inlet, send water through the whole system? Just a random thought: I have a "Little Giant" pool cover pump that I could drop into a bucket of antifreeze and pump into the water system. Will that get down to the pump?? I suspect the answer is "no" - trying to picture how the water lines ran in the old C where I could actually SEE the plumbing, I think the only water that went into the pump came from the FW tank....