You've stopped the mail, set the thermostat, and asked a neighbor to grab the packages. But there's one home system almost every family overlooks before summer vacation — and it's quietly working (or not working) the entire time you're gone.

Your water system doesn't pause when you leave. Pipes sit with stagnant water. Filters keep running — or stop running — without you there to notice. Salt levels in a softener drop. And if something goes wrong while you're away, there's no one there to catch it until you walk back through the door.

A few simple steps before you leave and when you return can make the difference between coming home refreshed and coming home to a problem. Here's what to work through.

Before You Leave: What to Check and Set

1. Know Your Main Shutoff — and Consider Using It

The single most effective thing you can do before a vacation is locate your main water shutoff valve and, for trips longer than a few days, turn it off.

If a pipe fails, a hose connection cracks, or an appliance develops a slow leak while you're gone, the difference between a minor inconvenience and a major flood is whether water was still flowing. Shutting off the main valve takes seconds and eliminates that risk entirely.

For shorter trips where a pet sitter or house sitter will be coming by regularly, you may prefer to leave it on — but knowing where the valve is matters either way.

2. Put Your Water Softener in Vacation Mode

If your home has a water softener, most modern units have a vacation mode setting specifically designed for extended absences. This pauses the regeneration cycle so the system isn't burning through salt while no one is home to use water.

Check your system's manual to activate it correctly — the steps vary by brand and model. If your softener doesn't have a vacation mode, the simplest option is to manually regenerate it once before you leave so it starts fresh, and then leave it in bypass mode for the duration of your trip.

One thing to avoid: leaving a softener running through full regeneration cycles with no water usage for weeks at a time. It wastes salt, can cause salt bridges to form in the brine tank, and puts unnecessary wear on the system.

3. Handle Your Reverse Osmosis System

RO systems have a storage tank that holds filtered water ready for use. If that water sits unused for the length of a long vacation, it can become stagnant — and stagnant water in a pressurized tank is not something you want to drink the moment you return.

Before a trip of a week or more, shut off the RO system at the feed water valve and drain the storage tank by running the faucet until it slows to a trickle. This prevents the water inside from sitting too long, and the system will refill fresh when you restart it on your return.

4. Set Your Water Heater to Vacation Mode

Most modern water heaters — both tank and tankless — have a vacation or low-power setting that maintains just enough heat to prevent issues without running full heating cycles continuously. For gas water heaters without that setting, the "pilot" position works similarly. For electric units, turning off the breaker is an option for longer trips.

Keeping a water heater running at full temperature with no water being drawn through it wastes energy and, more importantly, allows any bacteria present in the tank to multiply undisturbed in warm, stagnant water — a condition that becomes a real concern on trips of two weeks or more.

For trips longer than two weeks where you're shutting off the main water supply anyway, draining the water heater tank entirely is a worthwhile extra step that eliminates the stagnation risk and reduces sediment buildup.

5. Do a Quick Walk of Visible Plumbing

It takes about ten minutes to walk your home and check visible pipes, under-sink connections, toilet supply lines, and outdoor spigots for any signs of slow drips, corrosion, or loose connections. A small issue that would normally get caught in a day or two can quietly escalate into a much bigger problem over the course of a two-week vacation.

Disconnect garden hoses from outdoor spigots before leaving — a hose left connected creates back pressure and is one of the more common sources of slow outdoor leaks that go unnoticed during an absence.

When You Get Home: Don't Skip This Step

Getting home from vacation and going straight to the filtered water tap is tempting — but take five minutes first.

Flush Your lines Before You Drink

Water that has been sitting in your home's pipes for a week or more needs to be cleared before you drink it. This is true even if your water comes from a quality municipal system with good treatment. Stagnant water can develop off-tastes, pick up metallic notes from prolonged contact with pipes and fixtures, and in older plumbing, accumulate elevated levels of lead that leach during extended contact time.

The fix is simple: run each cold water tap for two to three minutes before using it for drinking or cooking. Start with the tap farthest from the main entry point into your home and work your way through. Pay particular attention to any faucets in guest bathrooms or utility rooms that see infrequent use — these will have been sitting longest.

Restart Your Water Softener Carefully

If you put your softener in vacation mode or bypass, bring it back online gradually. Let it run through one full regeneration cycle before using soft water throughout the house. This ensures the resin bed is properly recharged and you're not drawing partially treated water through your home on the first day back.

Check the salt level in the brine tank — even in vacation mode, some salt may have been consumed, and if the tank is getting low, top it off before resuming normal operation.

Recharge Your RO System

If you drained your RO storage tank before leaving, reconnect the feed water valve and let the system refill and pressurize before using it. This typically takes a few hours. Some homeowners prefer to let it fill, drain it once, and refill again before drinking from it — a quick double-flush that ensures any residual staleness is completely cleared.

Give Your Water Heater Time

If you turned your water heater off or set it to vacation mode, bring it back up to normal operating temperature before running a shower or dishwasher load. Most tank heaters take 30 minutes to an hour to fully reheat. Tankless units respond faster but benefit from a quick flush of the hot water line before use.

The Vacation Water Prep Checklist

Before you leave:

• Locate your main shutoff valve — and turn it off for trips of a week or more
• Set your water softener to vacation mode, or manually regenerate and bypass
• Drain your RO storage tank and shut off the feed valve
• Set your water heater to vacation or pilot mode
• Check whole-home filters — replace if close to due date
• Walk visible plumbing for drips or loose connections
• Disconnect outdoor garden hoses

When you return:

• Gradually reopen the main valve if you shut it off
• Flush all taps for 2–3 minutes on cold before drinking
• Run your water softener through a full regeneration cycle
• Refill and double-flush your RO system before use
• Bring your water heater back to normal operating temperature
• Check for any signs of leaks or issues that developed while you were away

The Bottom Line

Your home's water system is one of the most used — and most ignored — systems in the house. Vacation is when that neglect has the most opportunity to cause problems. A few simple steps before you leave and a short restart routine when you return means you'll come home to water that's clean, safe, and ready to use — and you won't spend the first day back dealing with something that could have been prevented in fifteen minutes.

What's In Your Water?

Find out how clean your water is (or isn’t) with our Free Water Assessment, and learn more about the Dupure water filtration, conditioning and softening systems that will help you make your house a safer, healthier home.

Book Your H20 Assessment