Every North Texas winter delivers at least a few hard freezes — and every spring, irrigation professionals spend weeks repairing what those nights did: cracked backflow preventers, split fittings, broken heads, and the occasional flooded yard when a freeze-damaged component finally let go under pressure. The damage is so predictable it has a season. It's also almost entirely preventable, with preparation measured in minutes.
Here's the complete guide to protecting your sprinkler system from Texas freezes: why the damage happens, the one component that matters most, the pre-winter checklist, and what to do when the forecast shows a hard-freeze night ahead.
The physics is simple and unforgiving: water expands when it freezes, and it doesn't negotiate with whatever contains it. Water trapped in a pipe, valve, or fitting during a hard freeze expands with enough force to crack brass, split PVC, and rupture seals — and the damage often hides until spring, when the system pressurizes for the season and the winter's cracks announce themselves as leaks and geysers.
Texas systems are especially vulnerable for a structural reason: unlike northern systems built for annual full winterization, ours are designed to run most of the year, with shallow lines and above-ground components — because our winters are mild. Mostly. The handful of hard-freeze nights each year meet systems that weren't built to ignore them, and the above-ground components take the hit.
If you protect one thing, protect this. The backflow preventer — the brass assembly standing above ground near where your system connects to the water supply — is the single most freeze-vulnerable component on the property: elevated, exposed, full of water, and built with internal seals and check valves that cracking destroys. It's also one of the more expensive routine components to replace, and its failure can leak continuously on the pressurized side of your system — the around-the-clock kind of water loss.
Backflow protection is simple: insulation. An insulated cover — the fitted pouches sold exactly for this, or wrapping with foam insulation secured against the weather — buffers the assembly through freeze nights. Installed before the first hard freeze and left on through winter, it's a few dollars of material standing between you and the spring repair season's most common ticket. If your backflow has never been wrapped, this is the paragraph that pays for the article.
Beyond the backflow, winter readiness is a short list, done once in late fall:
Set the controller to match the season. Dormant lawns need little to no irrigation — cut the schedule to winter minimums or use the controller's off or rain mode during cold stretches, running zones only during extended dry, mild spells. A system watering on its summer schedule through winter isn't just wasteful — it's keeping components charged with water on nights they'd rather be empty, and icing sidewalks as a bonus.
Disconnect the hoses. Not the sprinkler system, but the same physics: garden hoses left attached trap water in the spigot and the line behind it, and a freeze can split the pipe inside your wall — a plumbing repair wearing an irrigation costume. Hoses off, every fall.
Know your shutoff and drains. Locate your system's shutoff valve now, before you need it in the dark ahead of a storm — and if your system has manual drains or accessible test cocks on the backflow, know them too. Some Texas systems benefit from having vulnerable sections drained ahead of severe events; knowing your system's layout is the preparation.
Insulate any other exposed plumbing. Above-ground pipe runs, exposed valves, the well components on rural properties — anything holding water above the frost line gets the same wrap treatment as the backflow.
For the forecast that shows real cold — the multi-day arctic events Texas now knows too well — escalate: confirm the backflow cover is secure, shut off the system's water supply at the isolation valve and relieve pressure if you know how, make sure the controller won't fire zones onto freezing ground, and leave it all buttoned up until the thaw. For severe events, professional winterization — the system properly shut down and vulnerable components cleared — is cheap insurance, especially for systems with a history of freeze damage.
And when spring comes: don't just flip it back on. The post-winter startup deserves a real inspection — pressure restored slowly, the backflow watched as it charges, every zone run and checked — because winter's damage hides until pressure finds it, and the startup inspection is where cracked components get caught as repairs instead of as May's mystery leak.
The whole discipline, start to finish, costs an hour of fall attention and a few dollars of insulation — against a spring repair bill that runs into the hundreds when winter wins. The freezes are coming either way. The only question is whether your system meets them wrapped.
Get your system winter-ready and spring-checked by the same team. Kangaroo Outdoor Solutions provides complete irrigation maintenance and repairs — freeze preparation, startup inspections, and every fix in between. Build your quote today and take the freeze risk off the table.
