📅 October 12, 2026⏰ 6 min read👤 Alyssa Stewart, Licensed Plumber
A supply line failure while you're away for a week can flood a house before anyone notices — this is one of the more common and preventable causes of major water damage claims. Shutting off the main water valve before an extended trip is a simple habit that eliminates that specific risk entirely.
When It's Worth Doing
For trips longer than a few days, shutting off the main water valve is a reasonable precaution, particularly if nobody will be checking on the house while you're gone. It's a five-minute task that removes the risk of an undetected leak or burst line causing extensive damage over days or weeks.
How to Do It Correctly
Locate your main shutoff valve ahead of time — usually near where the water line enters the house, in a basement, crawlspace, or utility closet.
Turn it fully clockwise to shut it off (most valves), and test that it's actually fully closed by checking a faucet for reduced flow.
Open a low faucet briefly to relieve pressure remaining in the lines after shutoff.
If you'll be gone during freezing weather, consider also draining the lines rather than just shutting off the valve, since standing water in pipes can still freeze even with the main off.
💡 Test your shutoff valve before you actually need it: Some main shutoff valves, especially older gate valves, can seize up or fail to fully close if they haven't been operated in years. Test yours periodically rather than discovering it doesn't work during an actual emergency or right before a trip.
Other Things Worth Checking Before an Extended Trip
Ask a neighbor or friend to check on the house periodically if possible
Set the water heater to vacation mode if your unit has one, rather than leaving it running at full temperature unnecessarily
Check that your washing machine hoses aren't old or showing signs of wear, since supply hose failures are a common source of water damage
If leaving during winter, don't turn the heat off entirely even with water shut off — some residual moisture in pipes and appliances benefits from a stable temperature
❓ Is it worth shutting off water for a short weekend trip?
It's more commonly recommended for longer trips (a week or more), though there's no real downside to doing it for shorter trips too if you're already in the habit.
❓ What if my main shutoff valve won't fully close?
Older gate valves can seize up over time. If yours doesn't close fully or feels stuck, it's worth having it tested and potentially replaced with a modern ball valve, which is more reliable.
❓ Should I turn off my water heater too if I shut off the main?
If your water heater has a vacation or lower-temperature mode, using it is a reasonable step, though most water heaters can safely sit with water shut off for a trip without additional action.
❓ Can shutting off water prevent all leak-related damage while I'm away?
It eliminates the risk from a burst supply line or fixture failure, which is the most common source of major undetected water damage while traveling, though it doesn't address issues unrelated to active water flow, like a slow roof leak.
Travel With Peace of Mind
Let us make sure your shutoff valve and supply lines are ready before your next trip.
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