Freeze-Proof Your Well Before the First Texas Cold Snap: A Pre-Freeze Checklist

The first hard freeze in Texas never sends an invitation. One week you’re running the AC, and the next a blue norther drops the temperature 30 degrees by suppertime. If your water comes from a private well, that’s the night a cracked pressure switch, a split PVC line, or a frozen stock tank goes from “I’ll get to it” to an emergency. This guide is about the work you do before that night. If you’re already dealing with damage, our Post-Freeze Checklist covers what to do after.

When Does the First Freeze Usually Hit?

Texas is too big for one answer. Based on historical averages reported from National Weather Service data, here’s roughly when the first freeze shows up:

• Panhandle: mid- to late October. Dalhart averages around Oct. 18 and Amarillo around Oct. 26.
• West Texas: Lubbock around Oct. 31. Midland and Abilene in mid-November.
• North Texas: Wichita Falls around Nov. 11 and Dallas-Fort Worth around Nov. 21.
• Hill Country: earlier than the cities nearby because of the higher elevation. Fredericksburg averages around Nov. 10.
• Central Texas: Waco around Nov. 22, and Austin and San Antonio near the end of November.
• Gulf Coast and South Texas: Houston around early December, Corpus Christi near Christmas, and Brownsville often not until January.

Those are averages, not promises. Low spots, creek bottoms, and open pasture often freeze a week or more ahead of the nearest town’s thermometer. If you’re in the Panhandle, the clock may have already run out. Everyone else has a few weeks, so use them.

What Winter Storm Uri Taught Rural Texas

In February 2021, Winter Storm Uri held much of Texas below freezing for days. Waco hit -1°F on Feb. 16, one of the coldest readings on record there. The statewide power grid failed and millions of Texans lost electricity, some for days. For anyone on a well, that meant three problems landed at once:

• No power means no water. Your well pump runs on electricity. When the power went out, the water stopped, and so did any electric heat in the well house.
• Heat lamps and heat tape only work while the power is on. A lot of folks had a plan for the cold but not for a long outage on top of it.
• Livestock still needed water. Stock tanks froze over and troughs froze solid, so ranchers spent the week chopping ice and hauling water.

The lesson: build your freeze plan around insulation first, then backup power and stored water. Heat comes after those.

The Well House: Seal It, Insulate It, Then Heat It

A well house is often just a box over the wellhead, pressure tank, and switch. Start with the cheap fixes:

• Close gaps around the door, the walls, and the spots where pipe and wire come in. Use weatherstripping, foam, or caulk, and leave some ventilation if there’s a heater inside.
• Line the walls and ceiling with rigid foam board. Leave the pump and electrical gear easy to reach for service.
• Check the door latch. A door that blows open in a north wind can undo all your other work.
• Bank soil or hay bales against the outside of the north wall if you need to. Keep hay well away from heaters and wiring.

As for heat, a little goes a long way in a well insulated space:

• Thermostatically controlled well-house heaters made for pump houses switch on near freezing and off again. They’re usually the safest electric option.
• Heat lamps are common but cause real fires. Use them only in a fixture made for that use, secure it so it can’t fall, and keep it well away from insulation, wood, cobwebs, and dust.
• Space heaters should have tip-over and overheat shutoff, plug straight into a properly grounded outlet with no extension cords, and sit on a stable, noncombustible surface.
• Never use an unvented propane or kerosene heater in a closed well house. They can create carbon monoxide and fire hazards. A small, closed building is the worst place to run one.

Use a GFCI-protected circuit for anything you plug in out there, and if the wiring in your well house is old or patched together, get it checked before winter. Have a licensed electrician look at it, or a well contractor for anything on the pump side.

Pressure Tank, Switch, and Exposed Pipes

The pressure switch and its small tubing, along with the tank fittings and any aboveground pipe, are usually the first things to freeze.

• Wrap exposed pipe with foam pipe insulation. Tape the seams and cover the elbows and valves, not just the straight runs.
• Use UL-listed, self-regulating heat cable on vulnerable lines, following the manufacturer’s instructions to the letter. Don’t overlap cable unless the product says you can, and replace old, cracked, or brittle tape.
• Check the pressure tank’s air charge and listen for short-cycling. A failing tank or switch is easier to replace now than in a sleet storm.
• Find your shutoff valves and tag them, including the main line from the well to the house. Make sure everyone in the household knows where they are.
• Insulate or drain outdoor hydrants and hose bibs. Disconnect hoses, since a hose left attached can trap water in the faucet and split it.
• Look at the line from the well house to the house. Anywhere it comes aboveground, such as at a crawlspace, a slab edge, or a creek crossing, needs insulation.

Livestock Water

Animals drink water even in cold weather, and a frozen trough is a welfare problem fast.

• Test your stock tank de-icers and heated waterers now. Inspect cords for chew damage and keep them out of reach of animals.
• Insulate the riser pipes on automatic waterers, and check that the float valves move freely.
• Keep an axe or heavy bar handy for breaking ice on ponds and tanks. Don’t walk out on pond ice.
• Store extra water in clean barrels or a spare tank for a long outage, and know how you’d haul more if you had to.

Your Pre-Freeze Checklist

• Look up the average first-freeze date for your area and set a reminder two weeks ahead of it.
• Seal and insulate the well house, and fix the door latch.
• Test the well-house heater or thermostat, and clear anything flammable away from it.
• Have suspect wiring inspected and confirm GFCI protection.
• Insulate exposed pipes, the pressure switch tubing, and the tank fittings.
• Inspect or replace heat cable.
• Check the pressure tank and switch for problems.
• Locate and tag the shutoff valves.
• Disconnect hoses and protect the hydrants and hose bibs.
• Test the stock tank de-icers and insulate the waterer risers.
• Store drinking water and livestock water for several days.
• Plan for backup power: a generator sized for your pump and wired by an electrician through a transfer switch, with fuel stored safely. Never run a generator indoors or in an enclosed building.
• Line up a well contractor now, before everyone else is calling.

FAQ

Should I let faucets drip?
A slow drip can help keep water moving through vulnerable lines during a hard freeze. On a well, it also cycles your pump, so make sure the pump and pressure switch are in good shape.

Is a light bulb enough to heat a well house?
In a small, tight, well insulated well house during a mild freeze, sometimes. But in an Uri-type event it won’t keep up, and it does nothing once the power goes out. Insulation and backup power matter more.

Can I run my well pump on a portable generator?
Often, yes, if the generator is sized for the pump’s starting load and it’s connected safely. Have an electrician install a transfer switch rather than back-feeding through an outlet.

When should I call a pro?
Call if your pressure tank is waterlogged, the pump short-cycles, the wiring is questionable, or you’ve never inspected the system. Fall is the slow season, so it’s the best time to book.

Get It Done Before the Norther Does

A free afternoon and a few hundred dollars of insulation and parts beat a split pipe and a dry trough in the middle of a freeze. Need a hand? Find a local pro in the Texas Land Services directory of water well contractors.