cold weather plumbing advice?

[Brad]

I'm going to be taking my 21FBS out for her maiden voyage next weekend. Temps should be in the mid 20's at night and 50's during the day. I will be boondocking and was hoping to have water. I realize this is right on the threshold of having freezing issues, even with the furnace running. My concern is the low-point drain (and the freshwater drain). I'm planning on putting pipe foam around these (and perhaps wrapping some fiberglass).

Any thoughts?

 

[htneighbors]

Make sure you have plenty of propane! Make sure battery has plenty of charge. Gotta generator (w/fuel)?

 

[Brad]

Well I went ahead and winterized today. Gonna have some sub-freezing nights before we head out, and the forecast low at my destination the night before I arrive is now 15 F! If that shifts any I'd be in trouble! As it stands, it should still be mid to upper 20's when I'm there. I do think I'll still use the black tank with a gallon of antifreeze in it and a water jug for flushing. A 20/80 propylene glycol/water mix freezes at 20 degrees. 30/70 freezes at 10 degrees.

It will be for two nights, I've got two full propane tanks, so that's not a problem. I also have a second battery with the understanding that I'll get about one night out of each.

Thankfully I found all of the winterizing tidbits here in the forums (water heater bypass location, fresh tank bypass location, etc.)! Made things go fairly quickly for a first timer!