Originally Posted by Djdawg
So that's a usual thing Stan? Having a hose just lay in there?
I don't know much about how RVs were constructed in 1977, but I assume they were somewhat less sophisticated than today's rigs. It is standard costruction to have heating ducts leading from dash heater and furnace to the basement to keep plumbing and tanks from freezing in during cold weather travel and camping.
It is not unusual for us to travel in temperatures as low as 0 F.
Some of our Provincial parks here in Ontario are open all winter; and have camped in major snow storms in sub freezing temperatures without our plumbing system being compromised. We normally use electric heaters to heat the coach during cold weather until the temperature gets below freezing; then we use the furnace to make sure the basement is kept heated.