Underslung tanks in winter

[DavidS]

Hi Folks,

"Winter is coming!" - and I was wondering what folks do (or if it's possible) to stop underslung tanks from freezing in the cold weather?

 

[DXX]

Yes, I insulated mine and fitted a 50W heater element run via a cheap 12v programable controller. I put the sensing thermometer in the tank not the reading air temperature.
I did some tests last year, I set the heater set point to 3 deg C and kept the operating band low to preserve the battery.
Remember that a full tank will retain heat longer so it’s an advantage if the daytime ambient temperature is above freezing.

 

[DXX]

You can also get heat mats that glue onto water tanks specifically for van tanks.
I didn’t go down this route as I wanted to apply heat to the water not the tank skin and surrounding air as it’s not very efficient.