Bill: I have now winterized the plumbing in my trailer.
I'll try to cover what I have learned, so far.
Access to rear of water Heater in the bottom shelf in bath room closet.
Close the bypass valve.
Underneath the Bath room vanity are two pull type low point water dump valves.
Pull to open and dump. Drained water heater.
Suction line for water pump is under the couch. Had to lay down on floor and reach over behind the furnace to close valve to tank and open valve to suction line.
Placed hose in bottle, and turned on pump.
When pump started I flushed the toilet, and then opened the sink hot and cold faucets, then the bath / with shower, and then the kitchen . I let enough run in the drains to take care of them. And then the outside shower.
This all may be redundant to you, but I thought I would pass it along. Jim
Bill: One thing I did was change the entry steps from 1 step to two steps.
I found a 2 step at an rv repair shop, and traded for $ 30.00 I had to drill two holes and be careful not to over tighten the nuts. The bolts can be pushed up very easily and through the vinyl, I did not do that however.
I then bought a couple of L angles and bolted the back of the steps to the frame.
It is solid as a rock. Much shorter first step.