Warning: unclog your sump pump now before this damaging issue strikes!
What To Know
- A hole or crack in the suction line allows air to enter the system.
- When the water level in the sump basin drops below the pump’s intake, air can be drawn into the system.
- A blockage in the discharge line can create backpressure, causing air to leak into the pump.
A sump pump air lock occurs when air becomes trapped within the pump’s impeller chamber. This air prevents the impeller from rotating properly, hindering the pump’s ability to move water. Air locks can lead to inefficient pumping, overheating, and even pump failure.
Causes of Air Locks
- Leaking Suction Line: A hole or crack in the suction line allows air to enter the system.
- Improper Priming: Failure to prime the pump before operation can result in air getting trapped inside.
- High Water Table: When the water level in the sump basin drops below the pump’s intake, air can be drawn into the system.
- Clogged Discharge Line: A blockage in the discharge line can create backpressure, causing air to leak into the pump.
- Pump Wear: Over time, the pump’s impeller and other components can wear down, allowing air to bypass the seals.
Symptoms of Air Locks
- Pump Noises: A noisy pump, characterized by a sputtering or knocking sound, can indicate an air lock.
- Reduced Pumping Capacity: The pump may not be able to move water as efficiently as it should.
- Overheating: Air locks can cause the pump to overheat due to excessive friction.
- Pump Failure: A severe air lock can lead to pump failure if not addressed promptly.
How to Fix an Air Lock
1. Check the Suction Line
Inspect the suction line for any leaks or holes. If found, repair or replace the damaged section.
2. Prime the Pump
Disconnect the discharge line and fill the pump with water until it starts to overflow. Reconnect the discharge line and plug in the pump.
3. Check the Water Level
Ensure that the water level in the sump basin is high enough to cover the pump’s intake.
4. Clear the Discharge Line
Remove any blockages from the discharge line to allow water to flow freely.
5. Inspect the Pump
If the above steps do not resolve the issue, inspect the pump’s impeller and seals for wear or damage. Replace any faulty components as needed.
Prevention Tips
- Regularly inspect and maintain the sump pump system.
- Seal any leaks in the suction line.
- Prime the pump before each use.
- Keep the water level in the sump basin above the pump’s intake.
- Clear any debris from the discharge line.
Troubleshooting Common Issues
1. Pump is Not Priming
- Check the suction line for leaks or clogs.
- Prime the pump manually.
- Ensure that the pump is submerged in water.
2. Pump is Running but Not Pumping Water
- Check for an air lock.
- Inspect the impeller for damage or wear.
- Clear any blockages in the discharge line.
3. Pump is Overheating
- Check for an air lock.
- Ensure that the pump is properly sized for the application.
- Inspect the pump’s motor and bearings for damage.
Answers to Your Questions
Q: Can I fix an air lock on my own?
A: Yes, most air locks can be fixed by following the steps outlined in this guide. However, if you encounter persistent issues or suspect a more serious problem, it is recommended to contact a qualified plumber.
Q: How can I prevent air locks from occurring in the future?
A: Regular maintenance, proper priming, and keeping the water level above the pump’s intake can help prevent air locks.
Q: What is the best way to prime a sump pump?
A: Disconnect the discharge line and fill the pump with water until it starts to overflow. Reconnect the discharge line and plug in the pump.
Q: How often should I inspect my sump pump?
A: It is recommended to inspect your sump pump every 3-6 months, especially before heavy rainfall events.
Q: What are the signs of a failing sump pump?
A: Noisy operation, reduced pumping capacity, overheating, and frequent air locks can indicate a failing sump pump.
