Fall plumbing checklist: winterize your Charlotte home before the first freeze

By Hornets Nest Plumbing · October 2, 2026

Every January our phone fills with the same call, and almost all of it was preventable in October. Charlotte does not get northern winters, but it gets exactly enough hard freezes to split pipes in houses that were built for summer. Here is the fall checklist, in the order worth doing it.

Why October and not December

The work below is easy while it is mild and miserable once it is cold. More importantly, the first hard freeze here often arrives with little warning on the back of a mild week, which is precisely why it catches people. Doing this in October means you are never scrambling at 9pm before a forecast in the teens. If you want the detail on why our pipes are vulnerable at all, our guide on frozen pipes in Charlotte explains the mechanics. This page is just the list.

1. Hoses and outdoor faucets

Start here, because a connected garden hose is the single most common cause of a split outdoor faucet in this city. Disconnect every hose, drain it, and store it. Then, if you have interior shutoffs for the outdoor faucets, close them and open the outside spigot to let the pipe drain. If yours is an older standard hose bib rather than a frost-free one, consider upgrading before winter, since our hose bib guide covers why frost-free units drain themselves and standard ones do not.

2. Crawl space pipes

This is the highest-value hour of the whole list for a Charlotte crawl space home. Take foam pipe sleeves from any hardware store and cover the exposed supply runs under the house, paying special attention to pipes near foundation vents and along exterior walls where cold air moves. While you are down there, look for anything already dripping, and check the vapor barrier. If the crawl space is damp, that matters year-round, because moisture rusts water heaters from the outside and lets a slow leak drip into the dirt unnoticed.

3. Find and test the main shutoff

Do this now, in daylight, not while water is spreading across a floor. In most Charlotte homes the main valve is in the crawl space near the front foundation wall, in the garage, or at the meter box by the street. Turn it fully off and back on to make sure it is not seized. If it will not budge or it weeps, replace it before winter rather than discovering it fails during an emergency. Our shutoff valve guide covers the three valves worth knowing.

4. Water heater and its pan

Cold months are when a marginal water heater finally quits, and always at the worst time. Look at the tank shell for rust, check that the drain pan is not sitting full of water, and confirm the pan actually drains somewhere. If the unit is past ten years and showing rust or noise, replacing it on your schedule in October beats replacing it in an emergency in January. This pairs naturally with the annual tank flush and anode rod check.

5. Irrigation and exterior lines

Shut down and drain the irrigation system before the first freeze. Water left in shallow sprinkler lines and above-ground backflow assemblies freezes and cracks them, and a cracked backflow assembly is a several-hundred-dollar spring surprise. Insulate any exposed backflow device. Also check exterior utility sinks, pool lines, and any spigot on an unheated garage wall.

What it all costs

The night-of routine, for the genuinely cold nights

On nights forecast into the low 20s or teens, let a faucet on an exterior wall drip slowly, open the cabinet doors under sinks on outside walls so household heat reaches the pipes, and keep the thermostat no lower than 55 if you travel. That is it. You do not need to drip every faucet all winter, just the vulnerable ones on the genuinely cold nights. And if something does let go, our emergency line is answered 24 hours a day, and the first thing we will do is help you shut the water off.