How to Fix a Hot Tub Air Lock: Simple Steps to Restore Jet Power
If your hot tub jets are weak or not working at all after refilling, you may be dealing with a hot tub air lock. This common issue happens when air becomes trapped in the plumbing, blocking water flow to your jets. Fortunately, it’s an easy fix you can handle yourself. Follow this guide from Central Jersey Pools to get your spa back to normal quickly and safely.
What Is a Hot Tub Air Lock?
A hot tub air lock occurs when air pockets get stuck in the plumbing lines after draining and refilling your spa. Instead of circulating water through the jets, the trapped air prevents the pump from working correctly.
Here’s how your hot tub normally circulates water:
- Water is drawn in through the skimmer.
- It passes through the filter and pump.
- The pump pushes the water through plumbing lines to the jets.
- The jets release the water back into the tub.
When air interrupts this process, the system can’t circulate properly. Running the pump dry can cause serious damage, so it’s important to remove the air lock as soon as possible.
When Do Air Locks Usually Occur?
Air locks most often happen right after draining and refilling your spa. As the water drains out, it leaves the plumbing and pump empty. When refilling, water doesn’t always push the air out completely—leaving pockets that block flow to the jets.
Step-by-Step: How to Fix a Hot Tub Air Lock
There are two reliable ways to release trapped air and restore proper circulation.
- Burp the Hot Tub Jets
This quick method often solves the problem without tools:
- If your hot tub has a priming mode, turn it on.
- Run the jets on low speed for 10–20 seconds.
- Switch to high speed for another 10–20 seconds.
- Repeat this cycle several times until the jets run smoothly.
If your jets still gurgle or sputter after a few attempts, move on to the next method.
- Release Air from the Hot Tub Pump
If “burping” doesn’t work, you can manually release the trapped air:
You’ll need:
- A screwdriver
- Tongue-and-groove pliers
Steps:
- Turn off power to the hot tub at the breaker.
- Open the access panel to reach the pump.
- Close the discharge-side gate valve.
- Slowly loosen the bleeder valve until you hear air escaping.
- Once water begins to drip out, tighten the valve again.
- Restore power and test the jets.
Additional Troubleshooting Tips
If your jets still aren’t running at full strength, try these fixes before scheduling service:
- Check for clogs, leaks, or dirty filters.
- Make sure the water level is above the skimmer line.
- Repeat the priming process a few times.
- Never run the pump dry—if it overheats or smokes, shut it off immediately.
When to Call the Experts
If you’ve tried everything and your hot tub still isn’t circulating properly, it’s time to call Central Jersey Pools. Our expert technicians can diagnose and fix air lock issues, repair pumps, and ensure your spa’s water system runs perfectly.
Keep Your Spa in Top Shape
Hot tub air locks are normal after draining and refilling, but with the right steps, you can easily clear them yourself. For ongoing hot tub maintenance, repairs, and professional service, trust Central Jersey Pools to keep your spa clean, efficient, and ready whenever you are.
