I’m leaving Massachusetts tomorrow for our inaugural trip in our Winnebago Itasca, Sunstar 30T. I was told that filling the freshwater tank is okay if the heat is on to at least 55 degrees. Now that I’ve done this I fear I’ve made a mistake. Please advise, should I flush the whole system?Thank you

Drain, yes. Flush not required.

As long as you keep the belly warm and keep some heat going inside as well (open all the cabinets where any water lines might be located) then you will be fine. It doesn't need to be 65, but around 40 is pretty safe. The water tank itself is unlikely to have issues as the warmth of the water will help keep temps more stable in the belly area. IF, IF, you have NO exposed sewer drain pipes or these pipes have no fluid in them then they are OK at any temperature but once you flush you will have to keep all drain pipes exposed to those kinds of temps warm as well. Once you get away from the 17's and into the 35's then you are good to go for most anything you like.

We have relatives in Massachusetts and they are predicted to get to 10 degrees Fahrenheit tonight. I would run an small electric heater on low or medium in my sewer drain pipe area. I would open all cabinets and sink and shower doors as well as leaving the thermostat set on 45 or so. Run the water heater to temp if you have water in your fresh water tank.

You’ll be surprised how warm the basement stays even in cold weather when on the road.

FLHTCI, I am also in SE MI (like Old Wizard). Our climate is not that different than MA. I know, I am a refugee from the east coast Megeapolis. If you keep the temperature in the coach comfortable, there is no reason to drain the tanks. Be sure to have enough LP for heat in case you get stopped. but other than that there is little to worry about. Yes, you might like to leave cabinets that contain water lines open. If you should find an open cramp ground to stop at that might freeze, fill the potable tank and run from that. If you have to get out the potable water hose and are not sure it is going to stay warm, drain it before you stow it. If it gets to freeze, it is a problem.Unless you run a great deal of water, the black tank will not freeze, but the gray can. That can often be (capriciously) dumped into a storm sewer. Matt

Leaving tomorrow 13 degrees. | Good Sam Community

bgum
Explorer
Feb 25, 2022
We have relatives in Massachusetts and they are predicted to get to 10 degrees Fahrenheit tonight. I would run an small electric heater on low or medium in my sewer drain pipe area. I would open all cabinets and sink and shower doors as well as leaving the thermostat set on 45 or so. Run the water heater to temp if you have water in your fresh water tank.
LouLawrence
Explorer
Feb 25, 2022
As long as you keep the belly warm and keep some heat going inside as well (open all the cabinets where any water lines might be located) then you will be fine. It doesn't need to be 65, but around 40 is pretty safe. The water tank itself is unlikely to have issues as the warmth of the water will help keep temps more stable in the belly area. IF, IF, you have NO exposed sewer drain pipes or these pipes have no fluid in them then they are OK at any temperature but once you flush you will have to keep all drain pipes exposed to those kinds of temps warm as well. Once you get away from the 17's and into the 35's then you are good to go for most anything you like.
theoldwizard1
Explorer II
Feb 25, 2022
Drain, yes. Flush not required.

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