Hey there! As a supplier of submersible sewage pumps, I often get asked about the difference between submersible sewage pumps and submersible dewatering pumps. In this blog, I'll break down the key differences between these two types of pumps, so you can make an informed decision when it comes to your pumping needs.
What Are Submersible Sewage Pumps?
Submersible sewage pumps are designed to handle wastewater that contains solid particles and debris. These pumps are typically used in applications where the water needs to be moved from a lower level to a higher level, such as in sewage systems, septic tanks, and industrial wastewater treatment plants.

One of the main features of submersible sewage pumps is their ability to handle solids. These pumps are equipped with a cutting or grinding mechanism that can break down large solids into smaller pieces, allowing them to pass through the pump without causing blockages. This makes them ideal for handling sewage and other wastewater that contains solid waste.
Another important feature of submersible sewage pumps is their ability to operate underwater. These pumps are designed to be completely submerged in the liquid they are pumping, which helps to cool the motor and prevent overheating. This also makes them more efficient than other types of pumps, as they can directly pump the liquid from the source without the need for additional piping or equipment.
What Are Submersible Dewatering Pumps?
Submersible dewatering pumps, on the other hand, are designed to remove water from flooded areas, construction sites, mines, and other areas where water needs to be drained. These pumps are typically used in applications where the water is relatively clean and free of solid particles.
One of the main features of submersible dewatering pumps is their high flow rate. These pumps are designed to move large volumes of water quickly, making them ideal for applications where rapid water removal is required. They are also typically more lightweight and portable than submersible sewage pumps, making them easier to move and install.
Another important feature of submersible dewatering pumps is their ability to handle different types of liquids. These pumps can handle water, as well as other liquids such as oil, gasoline, and chemicals. However, it's important to note that not all submersible dewatering pumps are suitable for handling all types of liquids, so it's important to choose the right pump for your specific application.
Key Differences Between Submersible Sewage Pumps and Submersible Dewatering Pumps
Now that we've covered the basics of submersible sewage pumps and submersible dewatering pumps, let's take a closer look at the key differences between these two types of pumps.
Solid Handling Capability
As mentioned earlier, submersible sewage pumps are designed to handle wastewater that contains solid particles and debris. These pumps are equipped with a cutting or grinding mechanism that can break down large solids into smaller pieces, allowing them to pass through the pump without causing blockages. Submersible dewatering pumps, on the other hand, are designed to handle relatively clean water that is free of solid particles. While some dewatering pumps may be able to handle small amounts of solids, they are not designed to handle large solids or debris.
Flow Rate
Submersible dewatering pumps are typically designed to have a higher flow rate than submersible sewage pumps. This is because dewatering pumps are used to remove large volumes of water quickly, while sewage pumps are used to move wastewater at a slower pace. The flow rate of a pump is measured in gallons per minute (GPM) or liters per second (L/s), and it's an important factor to consider when choosing a pump for your specific application.
Head Pressure
Head pressure refers to the amount of pressure that a pump can generate to move the liquid from the source to the destination. Submersible sewage pumps typically have a higher head pressure than submersible dewatering pumps. This is because sewage pumps are often used to move wastewater from a lower level to a higher level, such as in sewage systems and septic tanks. Dewatering pumps, on the other hand, are typically used to remove water from flooded areas or construction sites, where the head pressure requirements are usually lower.
Construction and Design
Submersible sewage pumps are typically more heavy-duty and robust than submersible dewatering pumps. This is because sewage pumps are designed to handle harsh and abrasive wastewater, while dewatering pumps are designed to handle relatively clean water. Sewage pumps are often made of high-quality materials such as stainless steel or cast iron, which can withstand the corrosive effects of wastewater. Dewatering pumps, on the other hand, may be made of lighter materials such as plastic or aluminum, which are more suitable for handling clean water.
Cost
Submersible sewage pumps are generally more expensive than submersible dewatering pumps. This is because sewage pumps are more complex and require more advanced technology to handle solid particles and debris. Additionally, sewage pumps are often used in critical applications where reliability and performance are essential, which can also contribute to their higher cost.
When to Choose a Submersible Sewage Pump or a Submersible Dewatering Pump
Now that you understand the key differences between submersible sewage pumps and submersible dewatering pumps, you may be wondering which type of pump is right for your specific application. Here are some guidelines to help you make the right choice:
Choose a Submersible Sewage Pump If:
- You need to handle wastewater that contains solid particles and debris.
- You need to move wastewater from a lower level to a higher level, such as in sewage systems and septic tanks.
- You need a pump that is reliable and can withstand harsh and abrasive conditions.
- You need a pump that has a high head pressure to overcome the resistance of the piping system.
If you're looking for a high-quality submersible sewage pump, check out our Explosion-proof Submersible Sewage Pump. It's designed to handle tough sewage applications with ease.
Choose a Submersible Dewatering Pump If:
- You need to remove water from flooded areas, construction sites, mines, or other areas where water needs to be drained.
- You need a pump that has a high flow rate to move large volumes of water quickly.
- You need a pump that is lightweight and portable, making it easy to move and install.
- You need a pump that can handle different types of liquids, such as water, oil, gasoline, and chemicals.
Conclusion
In conclusion, submersible sewage pumps and submersible dewatering pumps are two different types of pumps that are designed for different applications. Submersible sewage pumps are designed to handle wastewater that contains solid particles and debris, while submersible dewatering pumps are designed to remove water from flooded areas and other areas where water needs to be drained. When choosing a pump, it's important to consider the specific requirements of your application, such as the type of liquid you need to pump, the flow rate and head pressure requirements, and the construction and design of the pump.
If you're still unsure which type of pump is right for your application, or if you have any questions about our submersible sewage pumps, feel free to reach out. We're here to help you make the right choice and ensure that you get the best pump for your needs. Whether you're a contractor, a homeowner, or an industrial user, we can provide you with the expertise and support you need to make an informed decision. Contact us today to start the conversation about your pumping requirements and let's find the perfect solution together.
References
- Pumps and Pumping Systems Handbook
- Industrial Pumping Applications Guide
