Guide to Buying Submersible Sewage Pumps


May 20,2024

Choosing the right submersible sewage pump requires careful consideration of several factors to ensure it meets your specific needs. Here's a comprehensive guide to help you make an informed decision.

Guide to Buying Submersible Sewage Pumps

Submersible sewage pumps are essential for handling wastewater in residential, commercial, and industrial settings. They are designed to operate underwater, efficiently moving sewage from one location to another, typically to a sewer system or septic tank. Choosing the right submersible sewage pump requires careful consideration of several factors to ensure it meets your specific needs. Here's a comprehensive guide to help you make an informed decision.


1. Understand the Basics

Submersible sewage pumps are designed to handle solid waste, making them different from regular sump pumps. They are typically installed in a sewage basin or pit and are submerged in the sewage they are meant to pump. Key features to look for include:


Solid Handling Capability: Ensure the pump can handle solids of a size that meets your needs. Standard residential pumps usually handle solids up to 2 inches in diameter.

Motor Power: Measured in horsepower (HP), the motor power determines the pump's ability to move sewage efficiently. Common residential pumps range from 0.5 HP to 1 HP.


2. Determine Your Requirements

Before purchasing a submersible sewage pump, assess your specific requirements:

Flow Rate and Head: The flow rate, measured in gallons per minute (GPM) or gallons per hour (GPH), indicates how much sewage the pump can move. The head, measured in feet, indicates the maximum height the pump can move sewage vertically. Calculate these based on the distance and height the sewage needs to travel.

Type of Waste: Determine if the waste includes only liquid or if it also includes solids. This will affect the type of impeller and the pump design you choose.

Usage Frequency: Consider how often the pump will be used. Continuous use pumps are built to withstand more wear and tear compared to those designed for intermittent use.

Submersible Sewage Pump

Submersible Sewage Pump


3. Types of Submersible Sewage Pumps

Single-Phase Pumps: Suitable for residential use, these pumps are easy to install and maintain.

Three-Phase Pumps: Ideal for commercial or industrial use, these pumps are more robust and can handle higher volumes and more demanding applications.


4. Materials and Durability

Construction Materials: Look for pumps made from durable materials like cast iron or stainless steel, which offer better resistance to corrosion and wear.

Seals and Bearings: High-quality seals and bearings are crucial for preventing leaks and ensuring long-term reliability. Double mechanical seals and oil-filled motors provide better protection and durability.


5. Pump Features

Automatic vs. Manual Operation: Automatic pumps come with a float switch that turns the pump on and off as the water level rises and falls. Manual pumps require manual operation but are often less expensive.

Grinder Pumps: These pumps have an additional grinding mechanism that breaks down solids into smaller pieces, preventing clogging and making them suitable for handling tough waste.


6. Installation and Maintenance

Ease of Installation: Some pumps come with user-friendly features that make installation easier, such as quick-connect fittings and comprehensive installation guides.

Maintenance: Regular maintenance is crucial for the longevity of your pump. Consider pumps with easily accessible parts and clear maintenance instructions.


7. Brand and Warranty

Reputable Brands: Choose pumps from reputable manufacturers known for quality and reliability. Brands like Zoeller, Liberty, and Grundfos are well-regarded in the industry.

Warranty: A good warranty offers peace of mind. Look for pumps with at least a 1-year warranty, but preferably longer, to cover any potential defects or issues.


8. Budget Considerations

While it might be tempting to choose a cheaper pump, investing in a high-quality, durable pump can save you money in the long run by reducing maintenance and replacement costs. Balance your budget with the pump's features and expected lifespan.



Selecting the right submersible sewage pump involves understanding your specific needs and the pump's capabilities. By considering factors like solid handling, motor power, construction materials, and additional features, you can ensure efficient and reliable sewage management. Always opt for reputable brands and consider long-term costs to make a well-informed investment.