Unbelievable...but true.
We purchased our 2017 Rockwood TT last June. After our last trip of the year (Nov} I parked it with plans to winterize at a later date. Due to health issues and two operations. it was never winterized...
Forum Discussion
westend wrote:pianotuna wrote:
Copper can be frozen approximately 7 times. Each time the walls get thinner. Finally they burst.77rollalong wrote:
i would not have gotten away with that, our motorhome is copper lines, and it got to 20 below for a few days.....should by a lottery ticket too
Don, I think that rule of 7 can be subverted. I've seen brand new copper pipe burst in the first night of a really cold snap. The cases I've seen of burst lines typically occurs at fittings, adjacent to them, and at bends that hold water.
FWIW, I often see anecdotal blow out procedures on this Forum where owners limit air pressure to 30-40 PSI. IMO, that's way to low to remove all the water in even a small system. One has to be cognisant about the transfer of energy of compressed gas moving that slug of water through a pipe and fixture, though. It is possible that a slug of pressurized air and water breaks a fitting or breaks a valve.
the rule of 7 may hold true, but its a used 40 year old motor home, i have no idea if its ever been frozen or not, my luck its frozen 6 times already. I like to blow them out as much as i can, then use the pump and pump af through everything. this year i had a bit of a problem with that in that i did the HW tank bypass got all the af in and the pump failed before i got the tank winterized. but since the tank was partly disconnected i just poured in a couple of liters of af into the top of the tank..
