Coldest temps heated tanks can handle?

[Cabinlife14]

We’re looking at some early spring camping , and am wondering what the coldest temps you’ve let your water stay in the lines / tanks using the Therma Heat tank heaters? We’re in Alberta, Canada ... currently the overnight temps are still below freezing - roughly -5 Celsius ( low 20’s Fahrenheit )
Can we summarize the trailer now and just use the heated tanks to keep our water from freezing? Thanks!

[hobienick]

What will the temps be after your trip when it is in storage?

[Reverse_snowbird]

I'd be more concerned about the water lines. You can put rv antifreeze in the black and gray water lines to keep them from freezing.