I will be leaving my home for three months, during winter, where I can expect the weather to go below freezing. My question is if I should turn off the main water valve in my house or just to the sinks, toilets, etc? If I should turn of the main valve, should I also turn of the hot water heater, and if so, are there any precautions I need to take (i.e. drain the tank)? I plan to keep the heat on while away. My last extended trip, I came home to find my toilet drain had sprung a leak and my downstairs kitchen was flooded. I would like to avoid this issue in the future. But, I have also been told to prevent freezing of pipes, I should keep the water on and slowly dripping. Not sure if it matters, but I think most of my pipes are PVC. I also have no sump pump.
thanks for any advice.