Turn heater on for the night or winterize?
I'm in Portland, Oregon. Temperature is supposed to get to 25F tonight. I was getting ready to go winterize the motorhome when it occurred to me that I might be fine just going over to the storage l...
Forum Discussion
westend wrote:
A lot depends on the pipes in use and if there is pressure in the lines. Typically, if there is pressure in a line, 25f won't be a problem if temperatures rise during the day. Unfortunately, most guys will kill the 12V battery power while in storage and that means no water pressure. The flip side of this coin is that if the pump is left on and a pipe does burst, the pump will run until it's shut off. Pumps are dumb.
The freezing point of water has virtually no relation to pressure at any reasonable pressure for a plumbing system (below atmospheric pressure through 1000+ psi). See the phase diagram at http://www1.lsbu.ac.uk/water/water_phase_diagram.html; this is the region where the division between solid and liquid is vertical.
