Troubleshooting Common Issues with Submersible Sewage Pumps

Posted by angroup on June 29, 2023

Submersible sewage pumps play a crucial role in efficiently removing wastewater from residential and commercial properties. However, like any mechanical equipment, these pumps can encounter issues that hinder their performance. In this article, we will explore common problems faced by submersible sewage pumps, discuss how to identify these issues, and provide troubleshooting solutions to ensure optimal pump performance

Understanding Submersible Sewage Pumps

Submersible sewage pumps are specially designed to handle and transport wastewater containing solid waste and debris. These pumps are submerged in the sewage or septic tank, allowing them to effectively pump the wastewater to a sewer system or a treatment facility. They are typically more powerful than conventional pumps, capable of handling heavy-duty applications.

Common Issues with Submersible Sewage Pumps

Clogging and Blockages

One of the most common problems faced by submersible sewage pumps is clogging and blockages. Solid waste, debris, and foreign objects can accumulate and obstruct the pump's impeller or discharge pipe, leading to reduced flow or pump failure.

Motor Failure

Motor failure is another issue that submersible sewage pumps may experience. This can occur due to various reasons such as electrical faults, overheating, or excessive wear and tear.

Float Switch Malfunction

The float switch is responsible for activating the pump when the sewage level rises above a certain threshold. If the float switch malfunctions, it may fail to trigger the pump, causing sewage to overflow or the pump to run continuously, leading to potential damage

Overheating

Submersible sewage pumps are designed to operate in water to cool the motor. However, if the pump is exposed to low water levels or the motor becomes overloaded, it can overheat. Overheating can cause the pump to shut down or operate inefficiently.

Leakage

Leakage is another common issue encountered with submersible sewage pumps. It can occur due to seal failure or damage to the pump housing. Leaks not only reduce the pump's effectiveness but also pose a risk of electrical hazards and contamination of the surrounding area.

Pump Not Starting

If a submersible sewage pump fails to start, it can be attributed to various reasons, including electrical issues, motor problems, or a malfunctioning control system. Identifying the underlying cause is crucial to restore the pump's functionality.

Unusual Noises

Unusual noises coming from the pump during operation indicate potential issues. These noises can be caused by debris stuck in the impeller, loose parts, or motor problems. Ignoring these sounds can lead to further damage and eventual pump failure.

Reduced Flow Rate

Power supply issues, such as voltage fluctuations, electrical surges, or improper wiring, can impact the performance of submersible sewage pumps. Inconsistent power supply can lead to motor damage or cause the pump to operate below its intended capacity.

Maintenance Neglect

Neglecting regular maintenance can contribute to various problems with submersible sewage pumps. Lack of cleaning, inspection, and servicing can lead to clogs, motor issues, and reduced lifespan of the pump.

How to Identify Issues with Submersible Sewage Pumps

To identify issues with submersible sewage pumps, it is essential to conduct regular inspections and monitoring. Here are some steps to help you identify potential problems:

Visual Inspection

Inspect the pump and its surroundings for any visible signs of damage, leaks, or debris accumulation. Look for cracks, rust, or loose

Monitoring Performance

Monitor the pump's performance by checking the flow rate, sewage level, and any abnormal sounds during operation. Note any deviations from normal operation.

Checking the Motor

Examine the motor for signs of overheating, such as a burning smell or hot casing. Ensure the electrical connections are secure and free from corrosion.

Assessing the Float Switch

Test the float switch by manually raising and lowering it to ensure it activates the pump correctly. Verify that it moves freely and is not obstructed.

Inspecting for Leaks

Inspect the pump housing, seals, and connections for any signs of leakage. Look for water accumulation or dampness in the surrounding area

Troubleshooting Common Issues

Once you have identified the issues with your submersible sewage pump, you can proceed with troubleshooting. Here are some solutions to common problems:

Clearing Clogs and Blockages

To clear clogs and blockages in your submersible sewage pump, follow these steps:

  1. Disconnect the power supply to the pump to ensure safety.
  2. Remove the pump from the sewage or septic tank carefully.
  3. Inspect the impeller and discharge pipe for any debris or obstructions.
  4. Use a brush or a soft cloth to remove any visible clogs or buildup.
  5. If the clog is stubborn, you can use a plumber's snake or a high-pressure water jet to dislodge it.
  6. Once the clog is cleared, reassemble the pump and place it back in the tank.
  7. Restore the power supply and test the pump to ensure it is working properly.

Repairing or Replacing the Motor

If you encounter motor failure with your submersible sewage pump, consider the following steps:

  1. Disconnect the power supply and remove the pump from the tank.
  2. Inspect the motor for any visible signs of damage, such as burnt wires or a seized rotor.
  3. If the motor can be repaired, consult a professional or refer to the manufacturer's guidelines for the appropriate repairs.
  4. If the motor is beyond repair, you may need to replace it. Contact the pump manufacturer or a qualified technician for assistance.
  5. Once the motor is repaired or replaced, reinstall the pump and restore the power supply.

Adjusting or Replacing the Float Switch

To address float switch malfunction, try the following:

  1. Ensure the power supply to the pump is disconnected.
  2. Locate the float switch and inspect it for any physical damage or obstructions.
  3. If the float switch is misaligned, adjust it so that it can move freely up and down.
  4. Test the switch manually by raising and lowering it to see if it activates the pump correctly.
  5. If the float switch is faulty and cannot be repaired, consider replacing it with a new one.
  6. Reinstall the pump, restore the power supply, and test the float switch's functionality.

Addressing Overheating

If your submersible sewage pump is overheating, follow these steps:

  1. Disconnect the power supply and remove the pump from the tank.
  2. Check the water level in the tank. If it is too low, add water to ensure proper cooling.
  3. Inspect the pump's motor for any obstructions or debris that may be hindering proper airflow.
  4. Clean the motor and ensure that the cooling vents are free from dirt and debris.
  5. If the pump continues to overheat, consult a professional to assess the motor's condition and make any necessary repairs or replacements.

Fixing Leaks

To fix leaks in your submersible sewage pump, take the following measures:

  1. Disconnect the power supply and remove the pump from the tank.
  2. Inspect the pump housing, seals, and connections for any signs of damage or deterioration.
  3. If you notice any leaks, replace the damaged seals or gaskets.
  4. Tighten any loose connections using appropriate tools, ensuring a secure fit.
  5. If the pump housing is cracked or damaged, consult a professional for repair or replacement options.
  6. Once the necessary repairs are made, reinstall the pump and restore the power supply.

Restarting the Pump

If your submersible sewage pump fails to start, consider the following troubleshooting steps:

  1. Check the power supply to ensure it is functioning correctly.
  2. Verify that the pump's control panel or switch is in the "on" position.
  3. Inspect the power cable and connections for any signs of damage or loose connections.
  4. If the power supply and connections are in proper working condition, check the pump's internal circuit breaker or fuse. Replace it if necessary.
  5. If the pump still doesn't start, consult a professional to assess the motor and electrical components for any faults or damages.

Resolving Unusual Noises

Unusual noises coming from your submersible sewage pump can indicate underlying issues. Follow these steps to address the problem:

  1. Disconnect the power supply and remove the pump from the tank.
  2. Inspect the impeller and surrounding area for any debris, such as rocks or foreign objects, that may be causing the noise.
  3. Remove any obstructions and clean the impeller thoroughly.
  4. Check the motor and bearings for signs of wear or damage. Lubricate the bearings if necessary.
  5. If the noise persists, consult a professional to diagnose and repair the issue, as it may indicate a more significant problem.

Restoring the Flow Rate

If your submersible sewage pump is experiencing a reduced flow rate, consider these steps:

  1. Disconnect the power supply and remove the pump from the tank.
  2. Inspect the impeller and discharge pipe for any clogs, debris, or signs of wear.
  3. Clean the impeller and pipe thoroughly, removing any obstructions that may be affecting the flow.
  4. If the impeller is worn or damaged, consider replacing it with a new one to restore optimal flow.
  5. Reinstall the pump, restore the power supply, and test the flow rate to ensure it has been restored.

Rectifying Power Supply Problems

If you suspect power supply issues with your submersible sewage pump, follow these steps:

  1. Check the electrical connections and ensure they are secure and free from corrosion.
  2. Inspect the power cable for any signs of damage, such as frayed wires or exposed insulation.
  3. Test the power supply using a multimeter to ensure it is providing the correct voltage.
  4. If there are voltage fluctuations or other electrical issues, consult an electrician to address the problem.
  5. Consider installing surge protectors or voltage stabilizers to protect the pump from electrical surges or fluctuations.

Establishing a Maintenance Routine

To prevent common issues with submersible sewage pumps, establish a regular maintenance routine:

  1. Clean the pump and remove any debris or buildup periodically.
  2. Inspect the impeller, seals, and connections for signs of wear or damage.
  3. Lubricate the bearings if necessary.
  4. Check the float switch and control system for proper functioning.
  5. Monitor the pump's performance and address any issues promptly.
  6. Follow the manufacturer's guidelines for maintenance intervals and recommended procedures.

Submersible sewage pumps are essential for efficient wastewater removal, but they can encounter common issues. By learning how to identify and troubleshoot these problems, you can ensure optimal performance and extend the lifespan of your pump. Regular maintenance, timely repairs, and professional assistance when needed will help keep your submersible sewage pump in excellent working condition.

An Pump Machinery is a professional submersible sewage pump manufacturer. If you require assistance with submersible sewage pumps, please contact us at anpump5@angroupcn.com or +86 15032857866; our technical sales engineers have considerable product knowledge and will be able to assist you.

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