Gordon-- To sanitize the fresh water tank you need to check this website under the search engine above and key in sanitize. It has the way to sanitize both the freshwater tank and also the water lines.
Do you know if your unit has a water heater bypass valve or not? If it does, you need to shut it off to the water heater and use the pump to pull water through the lines-- hot and cold-- and let it sit in the lines for at least an hour. I usually let it set for half a day or more then flush the lines and tank with fresh water at least twice to clear the clorox water out of them. The water heater also needs flushing but usually not with the clorox water just plain water.
Also, see if your dealer knows where the low point drains are for the waterlines. To tell you the truth, I just found out where mine were last week. These need to be drained also when you both flush the unit and winterize it! I have a 2004 2980RL and the low point drains are on the door side and BEHIND the tires by the axles. There are two and they both have the white cap on them also.
There are plenty of threads on the winterizing and dewinterizing your unit here on MOC. If you have any questions, just ask and someone will have your answer for you. Welcome to the MOC forum!
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