Freezing temperatures can cause serious damage to pools and spas if proper precautions aren’t taken. When water freezes, it expands — putting pipes, equipment, and surfaces under extreme stress. The good news? Most freeze-related damage is preventable with the right preparation and monitoring. Here’s how to protect your installation during cold periods.

Why freezing is a risk for pools and spas

Water expansion during freezing can lead to:

• Cracked pipes and fittings
• Damaged pumps, filters, and heaters
• Leaks that only appear once temperatures rise
• Costly repairs and delayed reopening

Even short cold spells can cause damage if water is trapped in equipment or circulation stops.

Key areas to protect

The most vulnerable parts of your pool or spa include:

• Plumbing and pipes
• Pump and filtration system
• Heater and heat exchanger
• Skimmers and returns
• Automatic dosing or treatment systems

Protecting these components should be a priority before temperatures drop below freezing.

Preventing freeze damage

1. Keep water moving
   Flowing water freezes far less easily than stagnant water. If your system allows it, keep filtration running during cold nights.
2. Lower the water level when needed
   For pools being winterized, reduce the water level below skimmers to prevent ice damage.
3. Drain and purge equipment
   Remove water from pipes, pumps, filters, and heaters to eliminate freezing risk.
4. Use proper covers
   A winter cover helps reduce ice formation and protects the water surface from debris.
5. Monitor temperature closely
   Sudden drops are often the most dangerous. Early detection allows quick action.

What about spas?

Spas are especially sensitive to freezing due to:

• Smaller water volume
• Higher operating temperatures
• More complex internal plumbing

If a spa remains in use during winter:

• Maintain a minimum operating temperature
• Never shut off circulation during freezing conditions
• Ensure insulation and covers are in good condition

If the spa is not in use, complete draining is the safest option.

How EcO helps prevent freeze damage

The EcO connected water analyzer helps you stay ahead of cold-related risks:

• Continuous temperature monitoring
• Alerts via the iopool app if conditions change
• Better visibility when you’re away from home

Knowing what’s happening in real time allows you to act before freezing causes damage.

Conclusion

Freeze damage is one of the most expensive — yet most preventable — problems for pool and spa owners. With proper preparation, regular monitoring, and the right tools, you can protect your installation throughout winter and ensure a smooth restart in spring. Prevention isn’t just easier — it’s far less costly.