Pool Freeze Protection Checklist and Customer Notice
Free pool freeze protection checklist: pre-freeze run order, power-loss drain plan, post-freeze restart check and a printable customer notice. No signup.
How this checklist works
A pool freeze protection checklist is an event protocol for an operating pool (not a seasonal close; that is a different checklist). It covers three phases: the pre-freeze run order before the temperature drops, the power-loss drain plan if the pump loses power during the freeze, and the post-freeze restart check once the event has passed.
The checklist asks for two temperatures. The freeze-protocol trigger is the air temperature at which you activate the protocol. One company's practice is to activate the freeze sensor as the ambient air temperature approaches freezing so the main pump runs automatically (Gohlke Pools). The drain-down threshold is the forecast low at or below which you drain equipment that cannot run continuously. Three freeze-severity presets set both values; choose Custom to enter your own. The customer notice tells the homeowner to keep the pump running until the air is above freezing (32 F / 0 C).
There is no chemical dosing on this checklist. The freeze protocol is about water movement and equipment protection, not chemistry. The customer notice section is a printable or emailable one-pager that tells the homeowner what to do (and what not to do) during the freeze.
A hard freeze is forecast and you have a route of open pools. The seasonal close checklist covers the northern winterization sequence (blow out lines, antifreeze, cover), but it does not help when the pool is still operating and the temperature is about to drop below freezing overnight. This checklist covers that event: the pre-freeze run order before the temperature drops, the power-loss drain plan if the pump loses power during the freeze, and the post-freeze restart check once the event has passed, plus a printable customer notice you hand the homeowner before the freeze.
Three sections, no chemicals
This is a water-movement and equipment-protection protocol, not a chemistry checklist. There are no dosing steps and no chemicals to add. The three sections cover the three phases of a freeze event:
- Pre-freeze run order. Run the main pump continuously, run or drain the spa blower, water-feature and spillover pumps (the booster does not need to run, since main-pump water circulates through it), open all valves, override timers, inspect and insulate exposed pipes, drain anything that cannot run, and confirm the freeze sensor if one is installed.
- Power-loss drain plan. If the pump loses power, switch off the equipment breaker or disable the freeze sensor first (so power returning does not restart a pump with its plugs out), then open every drain plug on the pump, filter, heater and chlorinator immediately. Open the air-relief valve to break vacuum. Blow out or gravity-drain above-ground pipe runs if possible. Cover equipment with blankets as a last resort.
- Post-freeze restart check. Wait for the air temperature to rise above freezing, reinstall drain plugs, prime the pump, walk the pad and pipe runs for cracks and leaks, read the filter pressure gauge, remove temporary insulation, restore timers and log any damage found.
Two thresholds, both operator-entered
The checklist asks for two temperatures:
- Freeze-protocol trigger: the air temperature at which you activate the freeze protocol (pump on, valves open, insulate pipes). One company’s practice is to activate the freeze sensor as the ambient air temperature approaches freezing so the main pump runs automatically (Gohlke Pools). That practice is cited as one company’s approach, not an industry standard.
- Drain-down threshold: the forecast low at or below which you drain all equipment that cannot run continuously. Single-digit temperatures call for extra precautions.
Three freeze-severity presets (light, hard, severe) set both values at once. Choose Custom to enter your own. The customer notice tells the homeowner to keep the pump running until the air temperature is above freezing (32 F / 0 C).
The customer notice
The last section is a standalone customer notice you can print or email to the homeowner before the freeze. It covers the four things the homeowner needs to know: do not turn off the pump, what to do if the power goes out, do not cover the pool with a solid cover while the pump is running, and do not restart equipment until the air temperature is above freezing. It states that it is a courtesy guide, not a guarantee against freeze damage.
For the seasonal close or open checklist (a different protocol), see the pool opening and closing checklist. For weekly maintenance during normal operation, use the weekly pool maintenance checklist. If the freeze damages equipment, price the replacement with the pool equipment replacement pricing calculator, and for pump run-time calculations during normal operation, use the pool pump run-time calculator.