heated holding tanks

[WRWII]

are heated holding tanks a option on roadtreks?? grey and black ?? fresh

[markopolo]

I've never heard of that being a factory option.

Maybe someone else knows for sure.

[SteveM]

Is the water system designed for winter use?
In 190 and 210 models, we’ve added a second fresh water tank inside. By using RV anti-freeze in the black and grey water tanks, the water system can be used in below freezing conditions to 10° F (-10° C). In 170 and RS models, the fresh water tank and lines and water heater should not be used in below freezing temperatures. However, you can still use the sink and toilet by carrying a fresh water supply inside the vehicle and using RV anti-freeze in the black and grey wastewater tanks.