hot h20 no problem even if it gets to freezing overnight, do it all the time, and have dfone so for 30 years. If the pipes are exposed under a camp on posts, a night to maybe 25 degrees is likely ok, but any more than one nite is risky, to the pipes, not the hot water heater. You'd need a week of nights below freezing and days in the 40's unless there's a hard wind blowing. Even then, its the pipes, not the heater that will have the problem first. |