Well that is far enough that it may get cold enough to cause issues. Last time I was at that lattitude I hit 11 Degrees and a line froze even though I was protecting them somewhat. (no damage)
My suggestion.. Do this at your last campground of the season less you have a dump station at home.
Dump. Open low point drains and fresh water storage drain.
Open all valves (Shower inside and out, Kitchen,, Force cycling of the ice maker, twice) Flush toilets That should clear all lines
Drain the water heater and replace the plug or Bypass it, Remove the RED wire on Atwood units from the ECO (this is a safety thing, optional but I'd do it)
Prop fridge door open (let it dry out) defrost and clean by the way.
Now, using a blow out plug (Most RV places sell them) and a tank type portable Air compressor, with a regulator set to 50 PSI, Blow the lines out. Blow till you either no longer get watter spittion out the low points or run out of air, Let Compressor recover.
Find the water pump and lay a towel under the inlet, Open the inlet strainer and let it drain onto the towel
Run pump for at least 1 minute dry. Then turn off (it is a run dry safe pump)
Re-assemble inlet strainer and remove towel to laundry.
Blow again,, and again (you need not do all the other stuff over and over, just blow like 5-10 times allowing 2 minutes minimum for recovery between blows.
Close upper valves (Shower, Kitchen and bath)
Note if you did NOT bypass the water heater you need to drain it again every few blowouts.
Pour PINK STUFF (Rv Antifreeze) into drains (1-2 cups each) if the drain has a trap use 2 cups.. And Toilets (enough to seal like the water normally would), Flush the first quart in the toilet into the black tank,, Make sure enough gets poured into teh sink to get into the gray tank.
come spring:
Sanitize as normal (1/2 cup bleach per 15 Gallons of water fill tank and run through all lines, Drain and then run re-fill with 1/2 cup baking soda and a full tank of water (note amount of soda not critical) again run through all lines till Evidence of bleach is gone, Drain and re-fill with fresh water, flush out lines to sinks, no need to flush soda out of toilet lines.
If water heater bypassed make sure the drain plug is in place and restore valves to normal, As it fills replace Red Wire Atwood) so it will work.
NOTE: Red wire off will cause the water heater to FAULT instead of operate. Every spring we get a raft of "OOPS, I forgot to fill the water heater before turning it on, did I break anything" That is why you pull the red wire.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times
