Opinion on winterability of my rig

nomad 289 wrote:
Got surprised by a 25F night 2 weeks ago on the road...

Black & grey empty, fresh and water heater full...
-Dumped anti-freeze into tanks and shower trap (1/2 gal total).
-Ran water heater on propane overnight.
-Opened cabinets and ran 2 space heaters on low. 64F inside at night.

Temps hit 31F around 1am, dropping to 25 by 4am, above freezing at 9am. Ya I was a bit worried, but worked out fine. YMMV.

Water has one of the highest heat capacities (energy required to raise temperature) of any substance. If one had fullish black and grey tanks with daytime temps in the 50-60 range I doubt they would freeze.

Small fittings and water lines will freeze much more quickly if exposed. Due to differences in construction and routing it's hard to say what a particular (your) RV model will endure.

Given your description I would:
-Check routing of All water lines. Are they inside/heated?
-Grey pipe to dump valve. Unusual. This will be risky since grey "heat mass" won't heat pipe/valve. Insulate or heat.



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Really? Where else is it gonna go to, mine is exactly like that as the grey valve is on the curbside, directly under the grey tank, it connects to the main dump outlet on the street side with an 1 1/2 inch pipe, I wouldn't worry about insulating this pipe, as there is NO water in it until you pull the grey dump valve, & then the water is not going to be in it very long.