if you're going to the service center, and their rv park, for a service appointment, then you'll be 'living' in the coach during that time, I would assume. Therefore, it's not necessary to relieve water from all of the lines or apply any 'pink stuff', as some folks do, but only to be aware that they are saying that the temps could be low enough that there could be some possibility of frozen outside water hoses.
If you are in the coach during the time you are there, you'll have the furnace or electric heaters and such on if the temps are really that low anyway, keeping the coach warm, and generally the basement areas as well. While in the service center during the day, between 7am and 3pm, their doors will be closed if the temps are that low.
The best bet is to prepare t0 simply use your onboard water and water pump during your stay, and insulate your basements well, such as any hatches or areas where air can infiltrate.
Your water tank will be fine, it takes a LONG time at very LOW temps to ever create any issues with it - and all of your interior water lines are within the coach and the basement, so those should be well above any temps that would create any problems. With your water heater working, you can also circulate hot water thru all of your lines every several hours, if the overnight temps get really low.
We were there in February of '16, during one of the worst winter storms the area had seen in many years, for several overnights during warranty work, and had no issues, even though there was 6" of snow, ice everywhere, and below freezing temps the whole stay. I even put a small electric heater in the wet bay area to minimize any low temps because we prefer electric heat to propane, though propane provides heating to our wet bay, when it IS used.
enjoy : )
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the Turners...
two Campers, two Electric cars
former diesel pusher traveler
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