How to Winterize a Water Well in Texas

Quick Answer

Even North Texas wells need winterizing — above-ground pipes and pressure tanks can freeze. Insulate the wellhead and heat-tape exposed pipes before December.

North Texas winters are mild most years — but “most years” is not every year. Winter Storm Uri in February 2021 reminded the entire state that temperatures can stay below freezing for a week straight in the DFW area and surrounding counties. Well owners who had unprotected above-ground piping paid for it.

The good news: winterizing a water well takes a few hours and less than $100 in materials for most properties.

What Can and Can’t Freeze

Understanding what’s vulnerable helps you focus your effort.

Safe underground (won’t freeze):

The pump and motor (typically 150–500 ft below ground)
The water column inside the casing
The drop pipe and submersible cable
The aquifer itself

Ground temperature in North Texas stays at approximately 60–65°F at depths below 3–4 feet. Even in the worst recorded Texas freezes, the underground components are protected.

Vulnerable above-ground components:

The 12–24 inches of steel casing above grade at the wellhead
Supply pipe from the wellhead to the house (especially if run on the surface or in a shallow trench)
Pressure tank in an unheated garage, pump house, or crawl space
Outdoor spigots and hose bibs connected to the system
Any exposed fittings, unions, or valves above grade

Winterization Steps

1. Insulate the Wellhead

Install a foam wellhead cover — a pre-formed insulated dome or box that fits over the casing. These are available at farm supply stores (Tractor Supply, Atwoods) for $20–$60. For extended freezes, add self-regulating heat cable (also called heat tape) wrapped around the above-grade casing section. Self-regulating cable adjusts its output based on temperature and won’t overheat — it’s safer than older constant-wattage cable.

2. Protect Above-Ground Supply Pipe

Any pipe running on the surface or in a shallow trench is at risk. Options:

Pipe insulation foam sleeves — inexpensive and effective for short runs ($1–$3/ft)
Heat cable under pipe insulation — for pipes that stay exposed through multiple freeze seasons
Deeper burial — if you’re replacing pipe, bury new runs at least 12 inches deep (24 inches is better in North Texas)

3. Protect the Pressure Tank

If your pressure tank is in an unheated garage or crawl space:

Wrap the tank with pipe insulation or a water heater blanket
For sustained freezes: a small electric space heater (250–750 watt) in the enclosure on a thermostat, set to kick on at 35°F
Make sure any space heater is rated for the enclosure and is not a fire risk near insulation

4. Disconnect and Drain Outdoor Spigots

Any outdoor spigot connected to the well system should be shut off at an interior shutoff valve and the outdoor spigot opened to drain. Disconnect garden hoses — a connected hose prevents the spigot from draining and is a common cause of frozen outdoor faucets.

5. Know Where Your Emergency Shutoff Is

In a freeze emergency, you need to be able to kill power to the pump quickly. Know where the pump breaker is in your electrical panel and where any shutoff valves are between the wellhead and the house. Label them now, before an ice storm.

If the Pipes Freeze

Don’t use an open flame — fire risk, and it can damage PVC
Use a heat gun, heating pad, or hair dryer — work from the faucet toward the source
Open the faucet before thawing so steam and pressure can escape
Check for cracks or splits as sections thaw — a cracked pipe will leak immediately
If you find damage: kill power to the pump, and call for service

Before December Every Year

Run through this checklist before North Texas’s first freeze risk (typically late November):

Wellhead cover installed or inspected
Heat cable plugged in and tested
Pressure tank space — insulated or heated
Outdoor spigots drained and disconnected
Pump breaker location confirmed
Emergency contact for well service saved in your phone

Frequently Asked Questions

Can a water well freeze in Texas?

The underground portion of a well — the pump, drop pipe, and water column — stays at a stable temperature well above freezing year-round (typically 60–65°F in North Texas, about the same as the average annual air temperature). What freezes is above-ground: the section of casing above grade, exposed supply pipe between the wellhead and the house, the pressure tank if it's in an unheated space, and any outdoor fixtures or spigots connected to the system. The February 2021 freeze was a hard lesson — even Texas wells can freeze when pipes are unprotected.

What happened to water wells during the 2021 Texas freeze?

During Winter Storm Uri in February 2021, the primary damage to well systems was to above-ground components: supply lines from the wellhead to the house split as water froze and expanded, pressure tanks in garages and crawl spaces froze and cracked, and the section of casing and piping at the wellhead was damaged when temperatures stayed below freezing for 5–6 consecutive days. Wells themselves (underground) were unaffected. Most repairs were plumbing replacements, not well or pump replacements.

How do I insulate my wellhead for winter?

The simplest protection is a foam wellhead cover — an insulated box or dome that fits over the casing. These run $20–$60 at farm supply stores or online. For extended freeze events, add a low-wattage heat cable (heat tape) wrapped around the casing from the wellhead down to below grade. Set the heat cable thermostat to turn on at 35°F — most heat cables have a built-in thermostat. The casing section above grade is typically 12–24 inches and needs very little heat to protect.

Should I worry about my pressure tank during a Texas winter?

Yes, if the pressure tank is in an unheated garage, crawl space, or pump house. The tank contains water under pressure — if it freezes, the tank bladder can rupture and the tank itself can crack. Add insulation around the tank and, if the space stays below 32°F for extended periods, use a small electric space heater (properly rated for the enclosure). Disconnect and drain outdoor spigots connected to the well system before the first freeze.

What do I do if my well pipes have already frozen?

Do not try to thaw frozen pipes with an open flame — this is a fire risk and can damage PVC pipe. Use a heat gun, electric heating pad, or hair dryer working from the faucet (open end) back toward the wellhead. Thaw slowly and check for splits as the pipe thaws — a split pipe will leak immediately when the ice melts. If you find cracked or split pipe, shut off power to the pump and call a contractor. Trying to run the pump with a broken supply line can run the pump dry and damage the motor.

Request Maintenance or Inspection

Tell us about the well and what you would like us to look at.