For a short trip, risk reduction usually beats a full shutdown. The right choices depend on season, whether anyone will check the property, freeze risk and what your insurer or equipment manuals require while the home is vacant.
Leave the house in a stable operating state
For a one- to three-week trip, make a small departure sheet rather than shutting down everything. Decide what happens to the main water, water heater, HVAC, refrigerator, sump pump, security system and any monitored leak devices. The correct water-heater “vacation” or standby setting depends on the equipment. Heating and cooling should stay within a range that protects plumbing, humidity-sensitive materials and any people, pets or plants that remain.
If you choose to shut off the main water, verify that doing so will not interfere with fire sprinklers, hydronic heating, irrigation, water-treatment equipment or other systems that need supply. Ask a trusted person to check the property on a schedule that matches weather and risk, and give them the main shutoff location plus a short list of what “normal” looks like. Before leaving, look under sinks and around the water heater so you are not departing with an already-active leak.
- Unplug nonessential countertop devices rather than creating complicated breaker changes.
- Use lighting and security routines that do not advertise an empty house.
- Check insurance or association requirements if the property will be considered vacant or unoccupied.
Reduce leak and power risk before packing the car
| Window | Maintenance checkpoint | What changes the date |
|---|---|---|
| 24–48 hours before | Walk for active leaks, clear drains, take out trash, and avoid starting a major plumbing/appliance project | Do not create a new failure mode right before departure. |
| Departure day | Set HVAC to a safe away temperature rather than turning it off | The building still needs freeze or humidity protection. |
| Water decision | Consider closing the main only if your heating, fire-sprinkler, irrigation, and appliance setup makes that appropriate | A blanket “always shut water” rule can be wrong for some systems. |
| Appliances | Unplug nonessential devices that do not need to remain powered | Reduce idle loads and surge exposure. |
| Monitoring | Use leak/temperature sensors and arrange a trusted person to check periodically | A sensor can alert; a person can verify and act. |
| Return | Walk the house before restarting every water-using appliance or turning temperatures back sharply | Look for leaks, odors, alarms, or storm damage first. |
Weather forecasts can change the departure checklist
- Forecast includes hard freeze or major storm.
- A known slow leak remains unresolved.
- Sump pump has no backup during a wet period.
- No one can access the house if an alarm triggers.
Write the return sequence before you leave
A good departure plan includes how the house will be brought back to normal. If you shut the main water, note which fixtures or appliances should be checked while pressure is restored and who will be present to watch for leaks. If the water heater, thermostat, or other equipment has a vacation mode, record the setting you used and the manufacturer’s restart steps. That is safer than returning late at night and guessing which valves or controls were changed.
Give the check-in person only the actions they may actually need: how to reach you, where the main water shutoff is, what temperature or leak alert deserves a call, and which service contacts to use. Avoid asking a neighbor to diagnose gas, electrical, roof, or plumbing faults. The handoff should make it easy to recognize a problem and limit damage, not turn an occasional house check into unsupervised repair work.
Give the check-in person a useful one-page brief
Winter trips need freeze protection; hot-humid trips need dehumidification/AC and mold control; storm-season trips need drainage and backup-power planning.
Spend on consequence reduction: leak sensors, a reliable house check, and fixing known defects. Do not buy elaborate smart-home gear if the main shutoff is inaccessible or the sump backup is dead.
Gas, electrical and complex water systems need cautious handoff
If the house has hydronic heat, fire sprinklers, a well system, complex water treatment, or other interconnected systems, ask a qualified professional before shutting valves or power you do not understand.
Short-trip house questions
Should I shut off the main water for a one- to three-week trip?
It depends on the plumbing, heating system, appliances and weather. Shutting the main can greatly limit damage from a failed supply line, but some fire sprinklers, boilers, humidifiers or other systems may depend on water. If you choose to shut it, know how the house is designed and what should remain supplied. A monitored leak shutoff can be another option. For longer trips, arrange a person to verify that heat, power and plumbing remain normal.
How low can I safely set the heat when leaving in winter?
A common winter-away planning baseline is around 55°F, but the safe setting depends on pipe location, insulation, local cold, wind exposure and the requirements of your equipment or insurer. Do not lower heat so far that plumbing in exterior walls, crawlspaces or garages loses protection. During extreme cold, a higher setting may be prudent. If the house has a boiler or other specialized system, follow its operating guidance rather than a generic thermostat number.
What should a house sitter actually check while I am away?
Ask the sitter to look for active leaks, loss of heat or cooling as seasonally appropriate, power failure, alarm warnings, storm damage and unusual odors. They should know where the main water shutoff is and how to contact you and a local service professional. A quick photo of the mechanical room, thermostat and any vulnerable basement area can document conditions. The visit should verify critical systems, not become an open-ended repair assignment.