Just a note, my RV had a heated icemaker line but the manufacturer didn't wrap the heat tape around the electronic valve located in the refridgerator access area. The valve froze, cracked and leaked when the temp. rose. It was a $100 valve that could have easily been spaired. Another tip, when traveling through cold climates use the pipe insulation to close off all the outside vents to the refridgerator, when you arrive at destination remove the bottom one. I use 100 watt clamp on shop lights in my basement for pump, tank and water lines and run my generator while traveling to keep from freezing up, once they are frozen it's difficult to thaw them out. While camped I swith to small electric space heaters. This helped me make it through a -15 degree week last Thanksgiving at Park City, UT.