westend wrote:
Has anybody used these ultraheat pads down into subzero temps?
I have them installed on both TT and TC. They were factory installed on the trailer. I added them on the truck camper. Deer camp in North Dakota, it's not unusual to see - 5 to - 10.
They worked fine, except for the dump valve. My tanks were warm enough, but, the dump valve froze up. This was with pipe and elbow heaters installed to within eight inches of the valve. Warm tanks are useless, if you can't get rid of the stuff.
Little trick I have learned -- Put a gallon of pink stuff in each tank, before use, and a couple hours before dumping, I put an extension (six inch) on the valve, fill it with disposable pocket warmers, and put the cap back on. By the time I get to dump station, the valve is thawed enough to dump. Put the used warmers in the trash and dump as usual.
Also, it can be difficult finding an open dump site. Many of them close up in cold weather.