Before leaving it’s recommended to do the following to your plumbing and HVAC system;
Turn the water off. If your water heater bursts or a water line breaks while you’re away you can imagine the mess when you return. By simply turning the main water valve off you can prevent a major catastrophe. In rare cases, the main water valve also shuts off the outside sprinkler system. In this case it is recommended to keep the water to water the grass and plants, but have someone check the house daily for any problems. Also, if you do leave the water on, turn off the valves to your clothes washer. Next to a leaky water heater, broken washer hoses are the number two water damage culprit.