How to Remove an Airlock from an Ice Bath Chiller | KOVE Guide
Mar 20, 2026
If your ice bath chiller is running but not circulating water properly, there’s a high chance you’re dealing with an airlock.
This is one of the most common setup issues with ice bath chillers and cold plunge systems — especially after installation, draining, or filter changes — and it’s usually quick to fix.
In this guide, we’ll show you exactly how to remove an airlock and get your system running properly again.
What Is an Airlock in an Ice Bath Chiller?
An airlock happens when air becomes trapped inside your chiller system, preventing water from circulating through the pump and pipework.
Because cold plunge chillers rely on continuous water flow, even a small pocket of air can stop cooling performance entirely.
Signs You Have an Airlock
- Little or no water returning to the bath
- Weak or inconsistent flow
- Chiller running but not cooling effectively
- Gurgling or bubbling sounds
- Pump sounding louder than usual
This is particularly common when first setting up systems like:
Step-by-Step: How to Remove an Airlock
1. Turn Off the Chiller
Always switch the unit off before making adjustments to protect the pump and prevent dry running.
2. Check Water Level
Ensure your ice bath is filled to an adequate level. Low water levels are one of the main causes of air entering the system.
3. Use the Drain Valve (Recommended Method)
This is the fastest and easiest way to clear an airlock.
- Open the drain valve slightly
- Allow water to flow for a few seconds
- Watch for bubbles clearing
- Close once flow becomes steady
This works by allowing water to push trapped air through the system naturally.
4. Prime the System (If Needed)
If flow is still inconsistent:
- Lift or reposition hoses
- Gently squeeze hoses to push water through
- Pour water into the inlet hose (if accessible)
The goal is to replace trapped air with water so the system can circulate properly.
5. Check Connections
- Ensure all hoses are tight
- Check seals and fittings
- Confirm filters are correctly installed
6. Restart the Chiller
Turn the unit back on and check for smooth, consistent water flow and normal operation.
Why This Matters (And Why Cheaper Chillers Struggle)
Airlocks are normal — but how easily they’re resolved depends heavily on system quality.
KOVE chillers are designed for practical, repeat use:
- Strong pump performance
- Stable flow rates
- Proper filtration systems
- Designed for daily use
Cheaper alternatives often:
- Struggle to self-prime
- Have weaker pumps
- Use restrictive filters
- Lose flow more easily
Choosing the Right Ice Bath Chiller
If you're setting up a proper cold plunge system, choosing the right chiller reduces issues like airlocks significantly.
- 1.0HP: Best for larger tubs and heavy use
- 0.8HP Heat & Cool: Ideal for contrast therapy
- 0.5HP: Perfect for compact home setups
All KOVE chillers use standard 1/2 inch connections, making them compatible with most ice baths.
How to Prevent Airlocks
- Always fill the bath before switching on
- Keep hoses straight and level
- Avoid running the pump dry
- Maintain clean filters
- Prime the system after draining
KOVE Tip
If your system ever loses flow:
Open the drain valve first, then restart.
This resolves most airlocks in under 30 seconds.
Final Thoughts
Airlocks are a normal part of any water-based system — but they shouldn’t be a recurring issue.
With the right setup and a properly designed chiller, your system should be reliable, low maintenance, and ready whenever you are.
Explore KOVE Ice Bath Chillers
Looking to upgrade your setup? Explore the KOVE chiller range for reliable, consistent cold plunge performance:
