How to Remove a Motor Air Lock: A DIY Safety Guide

Quick answer (read this first)

• Immediately turn off power to the water pump.
• Locate the air release valve on the pump.
• Carefully bleed air until water flows steadily.
• Tighten the valve and check for leaks.
• Restore power and verify water supply.

Safety first

• Always disconnect the main power supply to your water pump before any inspection or repair.
• Wear appropriate safety gear, including gloves, to protect from sharp edges or hot surfaces.
• Exercise extreme caution when dealing with water; potential for hot water and high pressure exists.
• Ensure your work area around the pump is dry to mitigate electrical shock risks.
• Do not attempt any electrical repairs. If electrical issues are suspected, contact a certified electrician immediately.

Tools you may need

• Adjustable wrench or pliers
• Clean bucket or absorbent cloths
• Work gloves
• Screwdriver (Phillips or flathead, if pump casing access is required)

Step-by-step

Step 1

Cut Power Safely: Before touching the pump, immediately switch off its main power supply from the circuit breaker or dedicated switch. Confirm it’s off.

Step 2

Locate the Air Release Valve: Find the small, often brass, air release valve or plug on the pump body or near its outlet pipe. Some pumps may have a bleeder screw.

Step 3

Prepare for Water Discharge: Position a bucket or place absorbent cloths directly beneath the air release valve to catch any water that will be expelled.

Step 4

Slowly Bleed the Air: Using an adjustable wrench or pliers, carefully and slowly loosen the air release valve. You should hear a distinct hissing sound as trapped air escapes.

Step 5

Wait for Steady Water Flow: Keep the valve slightly open until all air has been expelled, and a continuous, steady stream of water (free of bubbles) begins to flow out. This indicates the air lock is cleared.

Step 6

Secure the Valve: Once the water stream is consistent, securely tighten the air release valve. Avoid overtightening to prevent damage.

Step 7

Inspect and Clean Up: Thoroughly check the pump and surrounding connections for any signs of leaks. Clean up any spilled water immediately to prevent hazards.

Step 8

Restore Power and Test: Turn the main power back on to the water pump. Listen for the pump to prime and observe if normal water flow and pressure have been restored throughout your home.

Common mistakes

• Failing to disconnect the pump’s power supply before beginning, posing a severe electrical shock hazard.
• Overtightening the air release valve, which can strip threads or damage the valve, leading to leaks.
• Ignoring persistent or recurring air lock problems, which often signal a more significant underlying issue.
• Not preparing for water discharge, leading to water damage or slip hazards.
• Attempting to dismantle the main pump casing without specialized tools or expertise, which can void warranties or cause further damage.

When to call a professional

• If you feel uncertain or uncomfortable at any point during the process, prioritize your safety and call a professional.
• If the water pump fails to prime or your water supply does not return to normal after attempting these steps.
• If you observe persistent leaks, unusual loud noises, or any burning smells emanating from the pump.
• If you suspect the issue is electrical in nature, always consult a certified electrician.
• If air locks reoccur frequently, this indicates a deeper problem that requires professional diagnosis and repair.