How to winterize - Keystone 2015 Alpine 3555RL

Question edited for clarity - two/to
Question moved to RVs.

Videos tend to be generic, but the steps are the same on all RVs, remove water from anywhere that can freeze..

https://www.google.com/search?q=steps+to+winterize+Winnebago+26RK+Travel+Trailer

and de-winterize

https://www.google.com/search?q=steps+to+de-winterize+Winnebago+26RK+Travel+Trailer

..

videos and articles

https://www.google.com/search?q=winterize+2015+Forest+River+Wildwood+26TBS&

..

All vehicles should be winterized as should all caravans if they are to be subjected to freezing temperatures.

The owner's handbook usually provide a checklist and a how-to guide but briefly the caravan battery is removed and connected to a battery maintainer, all fluids are drained from toilet, tanks and pipework and the weight removed from the tyres.
It is also wise to guard against mice.

it is a little important that this task be done right (draining water system). if you don't get the water all out, when it freezes, it may rupture the containers.

consult manufacturer's specs on draining it. or check with an RV place as they will have had experience.

are you draining for the winter? there should be a bypass valve by the water pump to drain.

Pull bottom plug out of hot water heater tank let all water drain. Then open all water tank drain valves and be sure your RV is tilted so it will drain towards the valve. Go in RV access water heater valves put it in bypass so no antifreeze can enter water heater tank. Pump RV antifreeze with hose provided into all water lines throughout RV by turning on your main water pump after you have stuck the bypass hose in a new and full antifreeze bottle, then flush toilet until red antifreeze comes out. Open all faucets one at a time until red antifreeze comes out. I use 3 gal but some only use one, the more the better it’s cheap at Walmart. Don’t forget to run outside shower until red antifreeze comes out also, very important or it will crack in the cold. Finally make sure black and grey tanks are empty and flushed at your last camp trip before winterizing. Pour antifreeze in toilet and all drains making sure first that black and grey tank shut off valves are pushed in and closed. Get a quality cover and store RV, it makes a huge difference on protecting roof and roofs lap sealant! All RV antifreeze is non toxic and you just drain it all at your first camp stop after winter! Note: don’t forget to put water heater ionizer drain plug back in wrapped with new white Teflon tape and take water heater valves out of bypass! Draw a diagram of regular mode and winter bypass mode so you don’t forget especially hot and cold water heater blender valve between the two MUST be shut off after you unwinterize
or you will cool your hot water unwanted and have no hot water to use! Happy Camping folks!

De winterizing is easy. They use a pink antifreeze which is food grade. Make surer the water heater is not by-passed. This is sometimes done using furnished bypass valves so that less antifreeze is needed. You can flip the water heater pressure release after connecting to city water. Water will come out if it is full. Do NOT turn on the water heater until you are certain the tank is full of water so as not to burn out the element. (This is true every time you set up) Run all faucets until you no longer see pink and you are de winterized.

Maybe you need to prime your suction pump.

Easy. Find your clean water pump and add a diversion switch. Put the end into the RV antifreeze turn your pump on and suck the gallon out. Be sure to close your resivor to your clean water holding tank. Won't take much if u do that!

You don't need to find the water pump. Make sure your water tank is empty before adding RV winterizer to the water tank. Run each faucet in the RV with bypass valve NOT in winterize position until you see the antifreeze begin to come out of the faucet. Do this for both cold and hot water side for each faucet. Then move bypass valve to winterize position and run for a few seconds.