Dallas doesn't get Minnesota winters. But it does get enough freezing nights between November and February to crack your pool equipment if you're not paying attention. The 2021 winter storm proved that. Pool companies across DFW spent the entire spring replacing burst pipes, cracked pump housings, and blown heater heat exchangers.
The damage from a single hard freeze can cost $1,000 to $5,000+. The prep to prevent it costs almost nothing.
North Texas freezes are usually short. A cold front blows through, temperatures drop below 32°F for 12 to 48 hours, then it's back to the 50s. That pattern repeats five to ten times per winter, sometimes more.
The problem is that pool equipment isn't designed for any amount of frozen water sitting inside it. A pump housing full of water that freezes for even one night can crack. PVC pipe expands when water inside it freezes, and the pipe splits at the weakest point, usually a fitting or elbow. A pool heater with water sitting in the heat exchanger during a freeze can suffer internal cracking that doesn't show up until you fire it up in the spring.
It doesn't take a catastrophic storm. A single overnight freeze with no wind can do it if the equipment isn't protected.
The single most effective freeze protection is keeping water moving. Moving water doesn't freeze at 32°F the way standing water does. Your pool pump circulating water through the pipes and equipment prevents ice formation in most DFW freeze events.
When the forecast shows overnight lows below 32°F, run your pool pump continuously until temperatures rise above freezing. Don't rely on a timer. Override it manually or set your automation to freeze protection mode.
Most modern pool controllers (Pentair, Jandy, Hayward) have a built-in freeze protection feature. It kicks the pump on when an air temperature sensor reads below a set threshold, usually 36°F. If you have this, make sure it's enabled before the first cold snap. Test it in October so you're not troubleshooting at 2 AM in December.
If you don't have automation, set a phone alarm. When the forecast calls for freezing temps, go outside and flip the pump on manually before you go to bed. Leave it running until the air temp is above 35°F the next day.
Short freezes, the overnight-and-done variety, are handled by running the pump. Extended freezes where temperatures stay below 32°F for multiple consecutive days are a different situation. That's what happened during the 2021 storm. Power went out, pumps stopped running, and water sat frozen in pipes for days.
For a prolonged freeze with potential power outages, the safest play is a partial winterization: drain water from the pump, filter, heater, and all exposed pipes. Open all drain plugs on the pump housing and filter. Disconnect the heater if possible. Blow out any exposed plumbing with a shop vac or air compressor.
You don't need to drain the pool itself. Pool water has too much thermal mass to freeze solid in a Dallas winter, even a bad one. The shell is fine. It's the equipment and plumbing where damage happens.
Above-ground PVC pipe is the weakest link in DFW pool plumbing during a freeze. Underground pipe is insulated by the ground and rarely freezes. But the pipe between your pool equipment pad and the point where it goes underground is exposed, and it's where most freeze breaks happen.
Insulating exposed pipe is cheap. Foam pipe insulation from any hardware store costs a few dollars per piece and covers several feet. Wrap every piece of exposed PVC, every fitting, and every valve. Secure it with zip ties or tape. It won't help in a week-long deep freeze, but it buys you hours of protection during a standard DFW overnight freeze.
Pay attention to pipe that runs along north-facing walls or in areas exposed to wind. Wind chill accelerates freezing on exposed surfaces. A pipe in a sheltered corner might be fine, while the same pipe on a windy north wall cracks.
Pool heaters are expensive. $2,500 to $4,500 to replace, depending on the unit. The heat exchanger inside is the vulnerable component. It's a thin-walled metal tube or bundle that holds water, and it cracks easily when that water freezes and expands.
If you have automation with freeze protection, the controller should keep water moving through the heater during a freeze. If you don't have automation, you can manually run the pump, but make sure the heater is included in the circulation loop. Some plumbing configurations allow the heater to be bypassed. If yours is bypassed, water isn't flowing through it, and it's unprotected.
Salt cells are also vulnerable. The cell housing holds a small volume of water that can freeze and crack the cell or the housing. Salt cells cost $400 to $800 to replace. Same rule applies: keep water flowing through it, or drain it.
Once temperatures come back above freezing, do a walk-around before turning equipment back on. Check every visible pipe fitting and valve for cracks or leaks. Look at the pump housing for hairline cracks. Check the filter for damage. Inspect the heater housing.
Turn the pump on and watch for leaks at every connection point. A small crack might not be visible until the system pressurizes. Listen for hissing or spraying. Check the filter pressure gauge to make sure it's reading normally.
If you drained the equipment for a prolonged freeze, reverse the process: close all drain plugs, prime the pump, and restart the system. Run it for at least an hour while you watch for issues. Test the water chemistry because the pool sat stagnant during the freeze event. Chlorine will likely need topping up.
If you find cracked pipe, a damaged pump, or a leaking heater after a freeze, don't try to patch it. PVC pipe repair done wrong creates weak points that fail again. Pump housing cracks can't be reliably sealed. Heater heat exchangers need professional assessment.
Call your pool company and describe what you see. Most DFW pool companies are slammed with repair calls after every significant freeze, so call early. The first week after a freeze event, response times stretch out. If you can identify and report the damage early, you'll get service faster.
Freeze damage covered under homeowner's insurance varies by policy. Some policies cover burst pipes; others exclude pool equipment. Check your policy before filing. Document the damage with photos either way.
We'll check your equipment, insulate exposed pipe, and make sure your freeze protection is working before the first cold snap.
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