How to Prepare Your Plumbing Before a Vacation

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How far you go depends almost entirely on one number: how long you will be gone. A weekend away barely registers. A ten-day trip is the sweet spot this guide is built for, where a few minutes of prep turns a possible flood into a non-event. Anything past two or three weeks, or a home you are leaving truly empty for a season, crosses into territory that needs draining and full winterizing, which is a different job covered in our guide on protecting plumbing in a vacant or vacation home (129).

The steps here are deliberately light and reversible. You are not draining the system or pumping antifreeze into traps. You are leaving the house intact and removing the handful of risks that turn into expensive damage while nobody is home to notice them: a hidden drip running for ten days, a supply hose that lets go, or a cold snap reaching a pipe you forgot about. Each step can be undone in minutes when you walk back in the door.

Short Trip or Long Absence? Why the Prep Is Different

A short trip and a long absence call for opposite strategies. For one or two weeks away, you keep the system pressurized and intact and simply reduce risk. For a months-long or seasonal vacancy, you do the reverse: drain the water out so there is nothing left to leak or freeze.

The reason is exposure over time. The danger of a leak or a freeze is the same on day one whether you are home or not. What changes is how long the problem runs before someone catches it. A faucet that drips while you are standing there gets shut off in seconds. The same drip running unattended for ten days, behind a wall or under a sink, can soak drywall, warp a floor, and feed mold. Draining the whole system for a one-week trip is overkill and creates its own hassles, like air in the lines and a water heater you have to refill and relight. So for the short trip, the smart move is to cut off or reduce the water, not remove it.

This post stays in the short-trip lane. If you are closing up a cabin for the winter or leaving a house empty for months, follow the full drain-and-winterize procedure in our guide on protecting plumbing in a vacant or vacation home (129) and the whole-house winterizing steps in our guide on how to winterize your home’s plumbing (128) instead.

The Simplest Protection: Shutting Off the Water Before You Go

One step protects against almost every water-damage scenario at once: stop water from reaching the house at all. If no water is flowing in, a failed hose or a cracked fitting cannot flood anything. Turn off your home’s main shutoff valve before you leave, then open a faucet on the lowest floor briefly to relieve the pressure left in the pipes.

If you have never located your main shutoff, find it before your trip rather than the night you are packing. Our guide on how to shut off the water to your whole house (131) walks through where it lives and how to operate it. For this checklist, the instruction is simply to do it.

Two practical notes. First, if your home runs an automatic irrigation system, a steam humidifier, or anything else that expects water on a timer, shutting the main will stop those too, which is usually fine for a short trip but worth a mental check. Second, if shutting the whole main feels like too much, you can instead close the shutoff valves to the highest-risk fixtures and appliances: the washing machine, the dishwasher, the toilets, and any sink under which you have ever seen a drip. Shutting water to a single fixture is covered in our guide on how to shut off water to a single fixture (132). The washing machine hoses deserve special attention, since a supply hose that lets go can pour water for the entire length of your trip with no one there to hear it. Closing those valves is the highest-value partial step if you would rather not kill the whole main.

A quick reality check before you leave: walk to your water meter and read it, then read it again after a couple of hours with no water running. The EPA recommends checking the meter before and after a two-hour period when no water is being used; if the number moves at all, you probably already have a leak worth finding before you go.

Putting the Water Heater in Vacation Mode

A water heater spends your whole trip reheating a full tank you are not using, which wastes energy for no benefit. Many gas and electric storage heaters have a setting on the control dial or panel marked VAC or “Vacation,” and many tankless and heat-pump models have a dedicated vacation mode in their menu. On units that let you enter the number of days you will be away, the control holds the water cool and then reheats it before you return, sometimes around twelve hours ahead, so you come home to hot water without paying to keep it hot the whole time.

If your heater has no vacation setting, the Department of Energy’s guidance is straightforward. For an extended absence, turn the thermostat down to its lowest setting, or turn the heater off entirely. For an electric water heater, the clean way to turn it off is to switch off its circuit breaker.

Two cautions keep this in safe-DIY territory. First, this is a control-panel or thermostat adjustment only. Do not open the heater, drain it, touch the gas valve internals, or relight a pilot as part of vacation prep. Anything beyond turning a dial, selecting a menu setting, or flipping the dedicated breaker is work for a licensed plumber, not a vacation task. Second, the specific safe temperature your heater should run during normal use, and the scald-safety reasons behind it, are their own topic; see our guide on the right water heater temperature setting and scald safety (054). For a short trip you are simply lowering or pausing it, not redialing your everyday setting.

One more reason this matters: if you also shut off the main water as described above, leaving the heater running full-blast on an isolated tank does nothing useful, so pairing the two steps is the efficient combination.

A Last Walkthrough: Drips, Appliances, and Hidden Risks

The most valuable five minutes of vacation prep is a slow walk through the house looking for water that is already moving where it should not be. A leak you can catch and stop now will not run for the length of your trip.

Go fixture by fixture and look for the small problems that become big ones over ten days:

  • Faucets and showerheads. Watch for a steady drip. A faucet dripping once per second wastes more than 3,000 gallons a year, according to the EPA, and a slow drip you ignore is exactly the kind of thing that runs unwatched while you are gone.
  • Toilets. Listen for a tank that keeps refilling on its own, and run the EPA’s dye test: put a few drops of food coloring in the tank, wait ten minutes, and if color shows up in the bowl without flushing, you have a silent leak. The fix usually waits until you are back, but it is good to know about a running toilet before it runs for two weeks.
  • Under-sink connections. Feel the supply lines and the trap under each sink for dampness. A bead of moisture today is a puddle in ten days.
  • Appliance hoses. Check the washing machine and dishwasher supply hoses for bulges, cracks, or corrosion at the fittings. The deeper routine for keeping these from failing lives in our guide on how to prevent washing machine and dishwasher leaks (171); for the trip, just close their valves and eyeball the hoses.
  • Water heater and visible pipes. Glance at the base of the water heater and any exposed pipe joints in the basement or utility area for rust stains or moisture, which signal a slow leak you want to know about now.

The point of the walkthrough is not to fix everything before you leave. It is to find anything already leaking and either stop it or shut off the water to it, so a small, known problem cannot quietly become a large, discovered-on-return one.

Freeze Risk If You’re Leaving in Cold Weather

If your trip falls in freezing weather, a frozen pipe becomes the dominant risk, and your prep changes in one important way. A pipe that freezes can burst, and a burst pipe in an empty house can run for days. The cold-weather rule is to keep the house warm enough that pipes never reach freezing, even while you are away.

The American Red Cross recommends that if you will be away during cold weather, you leave the heat on, set no lower than 55 degrees Fahrenheit, and keep the thermostat at the same temperature day and night. Holding a steady temperature matters more than a low overnight setback when nobody is there to notice a pipe starting to freeze.

A few cold-weather steps that work alongside, not against, the rest of this checklist:

  • Open cabinet doors. Open the cabinet doors under kitchen and bathroom sinks, especially where the plumbing runs along an exterior wall, so heated room air can reach the pipes. The Red Cross specifically recommends this.
  • Let a faucet drip. On a faucet served by pipes most exposed to the cold, leaving a slight trickle running keeps water moving, which helps prevent freezing. Note that this step assumes you are leaving the water on, so it is a trade-off against shutting the main; in a hard freeze, keeping heat on and a faucet dripping is generally the safer choice than an unheated isolated system.
  • Mind the pipes in cold corners. Pipes in unheated crawl spaces, attics, garages, and along outside walls freeze first, because the home’s ambient heat does not reach them as well.

Notice that cold-weather prep can conflict with the shut-off-the-main advice above. If freezing is a real possibility for your trip, prioritize keeping the house heated and the vulnerable pipes from freezing. Draining the system to remove freeze risk entirely is the seasonal-vacancy approach, not the short-trip one, and it belongs in our guide on protecting plumbing in a vacant or vacation home (129).

Coming Home: What to Check Before You Use the Water Again

The step most vacation checklists skip is the one you do when you walk back in. Before you settle in and start running water freely, take two minutes to bring the system back online deliberately.

Turn the main shutoff back on slowly rather than all at once, which softens the surge of pressure returning to the pipes. Then walk the same fixtures you checked before you left. Look under sinks and around the toilets and appliances for any new dampness, since the return of full pressure is exactly when a weak fitting reveals itself. Run a couple of faucets for a moment to clear any air that settled in the lines while the water was off, and let them sputter until the flow is smooth.

If you turned the water heater down or off, switch it back to its normal setting or flip its breaker back on, and give it time to reheat a full tank before you expect a hot shower. A heater that was switched off entirely needs roughly an hour or more to bring a full tank back up, depending on its size and fuel. If you used a vacation mode that counts down to your return, it may already be reheating on its own.

Take one last look at the water meter after you have turned everything back on but before heavy use, the same trick from before you left. If it is creeping when no tap is open, something started leaking while you were gone, and catching it in the first hour home beats discovering it in next month’s water bill.

Frequently Asked Questions

Should I shut off the water for a weekend trip, or just a longer one?
For a night or a weekend, the prep is minimal; a quick leak check and confirming nothing is dripping is usually enough. Shutting off the main becomes worth the small hassle once you are away for several days or more, when an unnoticed leak has time to do real damage.

Will turning the water heater down or off save much for a short trip?
It saves the energy your heater would otherwise spend reheating a tank you are not using. On a one-week or two-week trip that adds up, which is why many heaters include a vacation setting. For a single night it is not worth bothering with.

Is it safe to leave the heat off entirely if I shut off the water?
Only when there is no chance of freezing. If freezing weather is possible, keeping the house heated to at least 55 degrees protects pipes that still hold water, and it is the safer choice than turning the heat off. In warm weather with the water shut off, a lower heat setting is fine.

Do I need to drain my pipes for a two-week trip?
No. Draining and winterizing is the procedure for a home left empty for a season or longer. For a one-week or two-week absence, shutting off or reducing the water and lowering the heater is enough, and draining only creates extra work refilling and restarting the system when you return.

If I only do one thing, what should it be?
Shut off the water at the main before you leave. With no water flowing into the house, the most damaging failures, a burst hose or a cracked fitting, have nothing to flood with. In freezing weather, that priority shifts to keeping the house heated so pipes cannot freeze.

This article is general information, not professional advice. When a problem moves beyond a simple control setting or shutoff, have a licensed plumber handle it.

Sources

  • U.S. Department of Energy, Energy Saver, Water Heating: https://www.energy.gov/energysaver/water-heating
  • U.S. Department of Energy, Do-It-Yourself Savings Project: Lower Water Heating Temperature: https://www.energy.gov/energysaver/do-it-yourself-savings-project-lower-water-heating-temperature
  • U.S. Department of Energy, Turn Down the Temperature, but Don’t Let Your Pipes Freeze: https://www.energy.gov/energysaver/articles/turn-down-temperature-dont-let-your-pipes-freeze
  • U.S. Environmental Protection Agency, WaterSense, Fix a Leak Week: https://www.epa.gov/watersense/fix-leak-week
  • American Red Cross, Preventing and Thawing Frozen Pipes: https://www.redcross.org/get-help/how-to-prepare-for-emergencies/types-of-emergencies/winter-storm/frozen-pipes.html

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