Hi,
We're looking after a house which has been vacant for about 6 months, = and will be vacant for at least a few more. We check it every 2nd or 3rd = day.
Nova Scotia, Canada, climate in winter is cold, often well below = freezing, sometimes down to -20C or lower (about -6F).
5 year old hot air oil furnace set at about 68F, serviced this summer.Two months ago, we turned off the main water supply valve, left all taps = open and water drained, including outside taps, toilet tank empty. I = forgot, so power flowed to the electric hot water tank until last week, = and the tank was full.
Question: about draining the hot water tank, which now has the power = supply breaker off:
Drain water, or leave full?
If drained, will the tank be more likely to rust from inside? If full, and the furnace fails, I suppose the tank may freeze and crack. If partly filled, what happens? Currently it's almost completely drained.
Tank is in heated basement, inlet & outlet pipes go upward. The basement = laundry tub valves are open.
Thanks! Dugie