Choose by length of absence
Start here, then read the notes on systems that complicate shutting the water off.
- IfOne or two nights, mild forecastThenKeep the heat at your normal or slightly reduced setting, close washer valves, and leave cabinet doors open on exterior walls.
- IfSeveral days to two weeks, or any trip with an arctic front forecastThenKeep heat at no less than about 55°F, close the main shutoff, open a faucet briefly to relieve pressure, and arrange a check every day or two.
- IfSeveral weeks to a seasonThenClose the main and drain the plumbing, or have a plumber winterize it; keep heat on at a moderate setting; arrange regular checks and a temperature alert.
- IfHouse is for sale or between tenantsThenTreat it like a long absence and confirm what the insurer requires for a vacant property.
Closing the main versus fully draining
| Close the main only | Close the main and drain |
|---|---|
| Quick and easy to reverse | Removes most water that could freeze |
| Limits a leak to the water already in the pipes | Takes planning: water heater, toilets, traps and appliances |
| Pipes still hold water and can still freeze and crack | Some systems need antifreeze or a plumber to do correctly |
| Suitable when heat stays on and someone checks in | Better for long absences and houses that may lose heat |
Systems that need extra thought before you shut off water
Boilers and radiant floors
Hot water heating systems use water to carry heat. Do not drain them or close their fill without asking a heating professional.
Residential fire sprinklers
Sprinkler supply is often connected to the domestic line. Ask a plumber or the system installer before closing a valve that would leave sprinklers dry.
Humidifiers
A furnace humidifier has a small water line that can be shut off at its saddle valve.
Water heater
Follow the manufacturer's vacation or off setting. If you drain the house, the tank needs special handling.
Wells
Acreage homes on wells may also switch off the well pump breaker, but heat cable and well-house heat need power to stay on.
General information for Parker, not a quote or professional advice. In an emergency, call 911.