Run antifreeze from the fresh water tank?

Kansas couple wrote:
Am ready to winterize my rig (will be my first time doing this). I saw some YouTube videos. Question: since I don't have a piece of line and the matching clamp is it OK to just put the pink antifreeze in my fresh water tank and run it through the system from there?

Yes you can, it works fine. It is what I do.

As others have posted, you will use more antifreeze - I use 6 gallons of antifreeze, although 4 would work... Walmart RV antifreeze (Supertech) is only about $3.50 a gallon, so not that big a problem. Prestone RV antifreeze was $4.50 a gallon (as of yesterday near me).

I assume your water heater has a bypass valve? I have read and been told to not let the antifreeze get into the water heater (at least in any substantial amount). Find the bypass valve, make sure it is working when you run the antifreeze - with my plumbing, it is easy to see where the pink antifreeze is going and that it is not going into the water heater. Make sure your water heater is drained! and then leave the drain plug loose, but screwed in. (edit: I just re-read the thread and saw where you said you already found the bypass valve)

I start running the faucet closest to the freshwater tank and work farther away. Remember to run ALL your faucets (kitchen sink, bathroom sink, bath faucet and shower head), including the outside shower if you have one, AND your toilet. Oh, and your outside kitchen if you have one.

In the spring I rinse out and sanitize the freshwater tank and water lines, no problems at all getting the antifreeze out.

As with everything, there are different ways to do things. Use the advice in this thread and figure out what works for you.