{"id":160978,"date":"2026-02-12T21:48:56","date_gmt":"2026-02-12T21:48:56","guid":{"rendered":"https:\/\/poolscouts.com\/mckinney\/?post_type=local-post&p=160978"},"modified":"2026-03-03T14:17:02","modified_gmt":"2026-03-03T14:17:02","slug":"protecting-your-north-texas-pool-from-sudden-freezes-a-complete-professional-guide","status":"publish","type":"local-post","link":"https:\/\/poolscouts.com\/mckinney\/local-post\/protecting-your-north-texas-pool-from-sudden-freezes-a-complete-professional-guide\/","title":{"rendered":"Protecting Your North Texas Pool from Sudden Freezes: A Complete Professional Guide"},"content":{"rendered":"

I\u2019ve been servicing pools in the Dallas\u2013Fort Worth metroplex for more than fifteen years, and I can promise you this: the most expensive phone call a pool owner will ever make in Texas happens between midnight and 5 a.m. on the first night the temperature drops below 25 \u00b0F. The conversation is always the same\u2014panic, then disbelief, then the quiet realization that the backyard oasis they enjoyed in September is now an insurance claim.<\/p>\n

North Texas doesn\u2019t have \u201cwinter.\u201d We have occasional arctic outbreaks separated by weeks of spring-like weather. That unpredictability is exactly why freeze damage here is so severe and so common. A 65- or 70-degree day keeps equipment warm and pliable; a sudden 18-degree night with wind makes plastic brittle in hours. The rapid temperature swing\u2014not just the cold itself\u2014is what splits pipes, cracks pump housings, and destroys heat exchangers faster than almost anywhere else in the country.<\/p>\n

After the February 2021 storm alone, our company replaced more than 400 pumps and repaired over 600 individual plumbing leaks in a single six-week period. Almost every one of those failures could have been prevented with the steps I\u2019m laying out below. This is the same checklist my senior technicians use on multi-million-dollar properties and the same advice we give every residential client from Fairview to Little Elm.<\/p>\n

The Science in Plain English<\/b><\/p>\n

Liquid water that turns to ice expands by approximately 9% in volume. In an open pool, that\u2019s not a problem\u2014the surface just pushes up a little. Inside a closed section of PVC, a pump volute, a filter tank, or a gas heater manifold, that 9 % has nowhere to go. The result is hydraulic pressure that can exceed 500\u2013600 psi in seconds, far beyond what standard Schedule 40 PVC or ABS is designed to contain when cold and brittle. The failure is often explosive. I\u2019ve seen pump housings split completely in half and filter tanks with sides bowed out like a balloon.<\/p>\n

Principle #1: If the Water Is Moving, It\u2019s Almost Impossible to Freeze<\/b><\/p>\n

Moving water can remain liquid down to the low 20s and sometimes lower if the flow is strong enough. This single fact is why continuous circulation is the gold standard of protection in fluctuating climates like ours.<\/p>\n

Modern automation systems (Pentair IntelliCenter, Hayward OmniLogic, Jandy Aqualink, etc.) have air-temperature sensors and built-in freeze-protection logic. When the sensor reads 34\u201336 \u00b0F, the system automatically starts the pump and any auxiliary equipment (booster pumps, heaters set to \u201cspa\u201d mode, etc.). However, we still find a surprising number of these features accidentally turned off after power surges, app updates, or accidental button presses. Take thirty seconds right now to open your app or panel and confirm the freeze guard is active.<\/p>\n

For the thousands of pools still running old mechanical timers or manual breakers, the responsibility falls to you. As soon as the National Weather Service issues a Freeze Warning or Hard Freeze Warning for Collin, Denton, Dallas, or Tarrant counties, manually switch the pump to the ON position (bypassing the timer) and leave it there until the danger has passed\u2014usually when highs are forecast above 40 \u00b0F for at least two consecutive days.<\/p>\n

Complete Pre-Freeze Preparation Checklist<\/b><\/p>\n

Do these in the afternoon or the evening before the front arrives:<\/p>\n

    \n
  1. Raise the Water Level
    \nContinuous circulation increases skimmer draw and surface evaporation. Keep water at the midpoint of the skimmer weir door or slightly higher. A pump that loses prime and runs dry for even ten minutes in freezing weather usually destroys its mechanical seal and often cracks the volute.<\/li>\n
  2. Empty Every Basket and Strainer
    \nSkimmer baskets, pump lint pots, in-line leaf canisters, and even the little hair-and-lint strainer in some heaters\u2014clean them all. Leaves, pecans, and cottonwood seeds that were \u201cno big deal\u201d in October become concrete-like clogs when the pump runs 72 hours straight.<\/li>\n
  3. Remove All Temporary Covers and Insulation
    \nDo not wrap pumps, filters, or heaters in blankets, tarps, or moving pads \u201cto keep them warm.\u201d Condensation becomes trapped, freezes, and can completely encase equipment in ice. Factory equipment is designed to operate in an exposed environment to ambient air.<\/li>\n
  4. Adjust Water Chemistry for Cold Conditions
    \nCold water holds more dissolved oxygen (which accelerates corrosion), dramatically slows chlorine kill rates, and makes calcium far more likely to precipitate out on heat exchangers and salt cells.
    \n\u2022 Lower pH to 7.2\u20137.4 (prevents scaling)
    \n\u2022 Raise free chlorine to 5\u201310 ppm entering the freeze
    \n\u2022 Brush walls, steps, and benches to remove biofilm
    \n\u2022 If you have a salt system, temporarily increase output 10\u201320 %\u2014cold water reduces cell efficiency<\/li>\n
  5. Valve and Feature Management
    \nOpen every return valve fully to maximize flow. If you have raised spas, sheer-descent waterfalls, deck jets, or negative edges, consider closing those valves and diverting all flow to main drains or floor returns. Surface features freeze first and can create ice dams that restrict circulation.<\/li>\n
  6. Outdoor Showers, Fountains, and Auto-Fill Lines
    \nTurn off and drain any outdoor plumbing that is not part of the pool circulation loop. We\u2019ve replaced countless cracked backflow preventers and auto-fill float valves that homeowners forgot about.<\/li>\n<\/ol>\n

    During the Freeze<\/b><\/p>\n