A sewer pump plays a vital role in handling wastewater and sewage in municipal, industrial, and residential settings. When sewer systems face high flows, solids, or grit, choosing the right sewer pump ensures reliable performance, fewer blockages, and long service life. In this blog you’ll learn:

• What a sewer pump is
• How it works
• How to select the right model for your application

We’ll draw on industry best practices, Gorman‑Rupp product types, and real‑world scenarios to help you make well-informed decisions.

What is a sewer pump?

A sewer pump is a pump designed specifically to handle sewage and wastewater that contains wipes, solids, suspended solids, grease, grit, and other contaminants. Its purpose is to move sewage from one location to another—for example from a building to the sewer main, or from a low‑lying area to a treatment facility.

Key characteristics of a sewer pump:

• Ability to pass solids without clogging
• Resistance to abrasion and corrosion
• Reliable operation under variable flow and head conditions
• Designed for messy, difficult media

How does a sewer pump work?

Sewer pumps can operate in different ways depending on their design. Below are common types and their operation principles:

Standard Centrifugal Pumps

• These use an impeller spinning at high speed to throw fluid outward, converting mechanical energy into kinetic energy, then into pressure energy.
• Standard centrifugal pumps are good when solids are small and suspended. They are simple, robust, and relatively easy to maintain.

Self‑Priming Centrifugal Pumps

• These pumps can evacuate air from the suction line so that the pump can start pumping even when partly filled with air.
• Useful in applications where the pump is located above the liquid level or when suction lift is required.

Pump Sets & Reliasource Systems

• For large flows or critical applications, pump sets (multiple pumps working in parallel or series) provide redundancy and capacity.
• Systems like Reliasource offer enhanced monitoring, serviceability and parts availability.

Which sewer pump is suitable? Key Selection Criteria

Choosing the right sewer pump depends on several important parameters. These include:

Flow rate (capacity):
This defines how much liquid the pump needs to handle per hour or per minute. It’s crucial to determine the maximum expected flow, and you should always add a safety margin—typically 20 to 30 percent above the normal peak flow.

Total head / lifting height:
This is the pressure required to move wastewater vertically and through the piping system. To calculate this, add the vertical lift, the horizontal distance, and any friction losses caused by the type and length of pipework. Also, factor in any valves, bends or other connections that may cause added friction in the pipework.

Solids handling:
Sewage often contains solids, grease, and fibrous materials. If the pump’s solids capacity is too low, clogging and damage will occur. Always check the maximum solids diameter the pump can handle.

Fibrous, stringy material in the fluids
Sewage often contains fibrous, stringy material such as sanitary wipes. In Industrial wastewater, ropes, plastic waste and other contaminants can be found. It is important to select a pump that can handle these difficult contents without failure or frequent clogging. Gorman-Rupp offers Eradicator® or Eradicator+® options on most of the sewage pump to prevent problems in such cases.

Pump type:
Different pump types perform differently depending on the conditions. You’ll need to decide between standard centrifugal or self-priming designs, dry vs wet installations, and ensure the pump can handle the required solids passage size.

Material and durability:
Sewage is corrosive and abrasive. The pump’s casing, impeller, seals, and wear rings must be built to withstand harsh media. Using the right materials reduces maintenance and extends the life of the pump.

Power and efficiency:
Pumps consume energy during operation, so efficiency matters. Choosing a pump with a motor and curve that match your system’s operating point helps reduce lifecycle costs.

Service and maintenance:
Downtime can be costly. The easier a pump is to maintain and clean, the better. Look for pumps with easy access to the impeller, simplified cleaning processes, and good spare parts availability.

Safety and Hygiene
Working on sewage equipment presents challenges when it comes to safety and hygiene. Above ground, self-priming pimps provide the optimized solution when looking at safety risks and hygienic working conditions during maintenance, inspections and repair.

Example applications

Here are typical scenarios and how you’d approach pump selection:

• Municipal sewer mains: High flow, occasional surges, lots of debris. Likely solution: standard or dry self‑priming centrifugal pump with large solids passage, multiple pumps in parallel.
• Government/wastewater treatment plants: Regulations, continuous operation, need for reliability. Consider pump sets, redundancy, support by services like Reliasource.
• Industrial waste water: Typically includes large contents such as ropes, plastic bags, and even tools and other hard particles. Self-Priming centrifugal pumps with a large solids handling capacity, often used in series or parallel to offer redundancy and additional performance, are often used as plug- and play electric powered pump sets.

At Gorman‑Rupp we offer several pump ranges that match different needs related to sewer pumping:

Gorman‑Rupp Pump Types

• Standard Centrifugal Pumps – ideal for general wastewater and sewage applications. [https://grpumpseurope.eu/pumps/standard-centrifugal/] link internal.
• Self‑Priming Pumps – when suction lift or priming above liquid level is required. Link: [https://grpumpseurope.eu/pumps/self-priming/].
• Prime Assisted Pumps – useful where frequent intermittent flows are expected (ideal for temporary or emergency situations). Link: [https://grpumpseurope.eu/pumps/prime-assisted/].
• Pump Sets – parallel or alternating sets for redundancy and high capacity. Link: [https://grpumpseurope.eu/pumps/pump-sets/].
• Reliasource SCS – our service, parts and monitoring support to ensure your sewer systems stay operational. Link: [https://grpumpseurope.eu/pumps/pump-sets-systems/reliasource-scs/].

Also, in terms of applications, sewer pumping is critical in construction (temporary bypass) and government/wastewater contexts. You can read more on Gorman‑Rupp’s work in [Construction and mining/ Sewage and wastewater] and [government/ Sewage and wastewater] applications.

Installation, Operation & Maintenance Best Practices

Even the best pump fails early without proper installation and care. Here’s how to ensure long life and reliable performance:

1. Correct Installation
   • Size piping properly to minimize friction lossesEnsure proper sealing at suction and discharge
   • Provide for adequate ventilation and cooling of motor
2. Priming & Start‑up
   • For self‑priming or dry priming pumps, follow manufacturer’s priming procedures
   • Avoid prolonged dry running (no fluid in the pump)
3. Monitoring & Controls
   • Use level sensors to prevent overflow or excessive run‑time
   • Monitor motor current to detect overload or blockages
4. Regular Maintenance
   • Inspect impeller and wear components periodically
   • Clean screens or strainers of debris
   • Lubricate bearings as recommended
5. Spare Parts & Support
   • Keep spare impellers, seals, wear rings in stock
   • Use the manufacturer’s authorized service providers to ensure parts compatibility

Common Mistakes & How to Avoid Them

• Undersizing flow/capacity → results in overload and short life
• Not allowing for solids → frequent clogging
• Flush installation without consideration of hose/piping losses → pump working further off its best efficiency point
• Skipping maintenance → reduces reliability

Conclusion

A sewer pump is more than just a motor and impeller: it must be matched to your flow, solids load, head requirements, and operating environment. At Gorman‑Rupp we combine a full product range—including standard and self‑priming pumps, dry self‑primers, pump sets, and complete packages like Reliasource—to help you get the right pump, installed and maintained properly.

If you’re evaluating a sewer pump for your project, our experts are here to help: whether you need to size a pump, assess materials, or plan for long‑term maintenance, we partner with you to ensure dependable performance.

What Are Industrial Pumps and Why Are They Essential?

In nearly every industrial sector, pumps play a critical role. Whether it’s transferring water, chemicals, oil, slurry, or wastewater, operations would simply stop without reliable industrial pumps.

An industrial pump converts mechanical energy into hydraulic energy to move fluids. Depending on the application, this may involve continuous flow, high pressure, or large volumes.

The right pump selection has a major impact on efficiency, service life, and maintenance costs. That’s why engineers, maintenance technicians, and procurement specialists must understand pump technology in detail.

1. The Role of Pumps in Industrial Processes

Industrial pumps are used to transport, mix, or dose fluids. They are found across a wide range of industries:

• Chemical industry: handling acids, solvents, and process liquids
• Food and beverage: hygienic pumps for liquid foods and CIP cleaning
• WastewaterWastewater treatment: self-priming pumps for dirty water and sludge
• Oil and gas: high-pressure pumps for oil transport and refining
• Construction and water management: drainage, stormwater and flooding control,  and mobile pumping systems

A well-designed pumping system ensures continuity, safety, and energy efficiency across every industrial process.

2. The Main Types of Industrial Pump

Centrifugal Pumps

The most common pump type in industrial applications. A rotating impeller creates flow and pressure to move the liquid outward. Ideal for high flow rates with low to medium pressure.

Applications: water transport, cooling systems, irrigation, process water.

Positive Displacement Pumps

These pumps move a fixed amount of fluid per revolution, making them suitable for viscous or high-pressure applications.

Common types include vane pumps, lobe pumps, and gear pumps.

Applications: food products, oil, and chemicals.

Self-Priming Pumps

Self-priming pumps, such as the Gorman-Rupp Super T Series, combine high reliability with easy maintenance. Perfect for dirty water and setups where the pump is positioned above the liquid level.

Applications: wastewater, construction, and industrial cleaning.

3. How to Choose the Right Pump for Your Industrial Application

Selecting an industrial pump requires understanding key process parameters such as viscosity, temperature, pressure, and chemical composition of the fluid.

Important criteria include:

• Flow rate and head: how much fluid must be moved per time unit
• Fluid properties: is it abrasive, corrosive, or viscous?
• Installation conditions: horizontal or vertical, wet or dry setup?
• Maintenance and reliability: how easily can the pump be serviced or cleaned?

An incorrect selection can cause overloading, cavitation, or excessive maintenance costs. Partnering with a specialized pump supplier ensures accurate calculations and optimal performance.

4. Sustainability and Efficiency in Modern Pumping Systems

Today’s industries demand high energy efficiency and sustainability. Modern industrial pumps are equipped with:

• Variable Frequency Drives (VFDs): to optimize motor speed and energy consumption
• High-quality mechanical seals: to prevent leakage and downtime
• Corrosion-resistant materials: such as stainless steel, cast iron, or engineered plastics

Modern level control systems can also help to run the pumps at their optimal performance level and to reduce energy costs.

With smart design and regular maintenance, the lifespan of pumping systems can be greatly extended. Gorman-Rupp pumps are known for low maintenance costs, easy serviceability, and outstanding reliability.

5. Maintenance and Reliability, Keys to Continuity

Even the best industrial pump requires regular maintenance. A preventive maintenance plan typically includes:

• Inspection of bearings, seals, and impellers
• Monitoring for vibration and noise
• Cleaning of filters and suction lines
• Replacing worn components

Preventive service minimizes downtime and costly repairs. Manufacturers like Gorman-Rupp design pumps with easy access to internal components, ensuring minimal disruption and maximum uptime.

Conclusion

Industrial pumps are the beating heart of countless production processes. Selecting a reliable, low-maintenance, and efficient pumping system determines not only operational performance but also long-term cost savings.

With in-depth knowledge of pump technology and a trusted partner like Gorman-Rupp, every industrial operation can count on a robust, future-ready pumping solution.

At construction and infrastructure sites, groundwater often presents an invisible challenge. When an excavation pit fills with water, progress can quickly come to a halt. A dewatering pump provides the solution. This type of pump temporarily lowers the groundwater level so that work can continue safely and efficiently.

In this article, you’ll learn about the various pumps used in dewatering, what a dewatering pump does, how it works, and what to consider when selecting and maintaining one. We’ll also explain why a self-priming pump from Gorman-Rupp is a reliable choice for any dewatering project.

What is a dewatering pump?

A dewatering pump is designed to remove groundwater around an excavation or infrastructure site. The goal is to lower the water level temporarily so the soil remains stable and workable. This process is also commonly known as wellpointing, drainage, dewatering or groundwater control.

The various techniques used in dewatering, requires the use of various types of pumps.

Wellpointing is a technology where a network of vertical filter hoses or wellpoints draw water from the ground. The discharged water is then released into a drain, ditch, or temporary storage area.

(Horizontal-) drainage uses a series of horizontal underground hoses or pipes to extract the water. 

General dewatering refers to pumping surface water from an excavation pit or trench.

Common applications include:

• Foundation and basement construction
• Sewer and utility installations
• Road and railway construction
• Bridge and tunnel works

Depending on the groundwater depth and required flow, different pump types may be used.

Types of dewatering pumps

Self-priming pumps

These pumps can handle air and water simultaneously, and are the preferred choice when the water supply to the pump is intermittent. Gorman-Rupp offers wet- and dry self-priming pumps for this. The latter works with an additional vacuum priming pump, often also referred to as prime-assisted pumps.

Self-priming pumps are ideal for dewatering because they start quickly, require minimal maintenance, and are resistant to debris and solids. Moreover they offer high flow capacity, enabling fast dewatering.

Advantages:

• Automatic priming, even in dry conditions
• Rugged construction for continuous operation
• High flow design
• High reliability and easy access for service

Diaphragm pumps

A diaphragm pump uses a flexible membrane to draw and discharge water. It’s often used for small-scale or temporary dewatering projects.
This type performs well with heavily contaminated water, for example on muddy or silty sites.

Piston pumps

A piston pump uses one or multiple reciprocating pistons. On the suction stroke, water is primed into the cylinder and upon the discharge stroke, the water is pressurised and discharged.

This type of pump is commonly used for vertical well pointing, due to the pump delivering a high vacuum. The low discharge capacity makes them less suitable for other dewatering jobs where self-priming centrifugal- or membrane pumps are more suitable.

Submersible pumps

For deep excavations, a submersible pump may be used. It operates directly in the water and continuously removes groundwater. These pumps are effective at greater depths but require more maintenance and electrical power.

How a dewatering pump works

A standard dewatering setup consists of the following key components:

1. Wellpoints, horizontal filter tubes or suction piping installed in the ground or the well to collect water
2. A vacuum header pipe or hoses connected to the pump
3. The dewatering pump itself, which discharges the water
4. Discharge piping, often consisting of flexible hoses or rigid piping or a combination of these.

The pump creates a vacuum in the pipe network, drawing water from the source. The discharged water is typically pumped into surrounding surface water , or reused for dust suppression or irrigation.

A self-priming centrifugal pump from Gorman-Rupp can handle both air and water, ensuring a stable operation even under fluctuating conditions. This makes it ideal for construction sites that demand high flow rates, high reliability and uptime.

When to choose a dewatering pump

A dewatering pump is essential whenever groundwater interferes with excavation, foundation, or utility work. Key factors to consider include:

• The type of dewatering technique used in your project
• Soil type: sand, clay, or peat affect suction capacity and filtration.
• Water level and flow rate: high groundwater or large flows require stronger pumps.
• Project duration: for long-term use, an efficient pump with low maintenance costs pays off.
• Water quality: trash-handling pumps prevent clogging in dirty conditions.

Gorman-Rupp pumps are known for their high availability and service-friendly design. Thanks to their self-priming system, they require fewer interventions and deliver consistent performance throughout the project.

Importance of regular maintenance

Proper maintenance extends the life of a dewatering pump and prevents costly downtime.
Routine service should include:

• Checking hoses, seals, and valves
• Cleaning the casing and impeller
• Monitoring oil levels and shaft seals
• Inspecting filters and check valves

It’s recommended to have maintenance carried out by trained technicians. This ensures safety, energy efficiency, and reliable operation for future projects.

Advantages of Gorman-Rupp dewatering pumps

Gorman-Rupp pumps are built for performance and durability.
Main benefits include:

• Fast priming and high efficiency with dry self-priming design
• Minimal maintenance due to easy-access pump housing
• Long service life with quality materials and robust construction
• Handles solids and harsh conditions without clogging

These qualities make Gorman-Rupp pumps ideal for construction, industrial, and municipal dewatering projects where uptime and dependability are critical.

Conclusion

A dewatering pump is essential for any project where groundwater obstructs progress. The right pump selection determines both the efficiency and continuity of operations.
Gorman-Rupp’s self-priming centrifugal pumps provide the perfect combination of performance, reliability, and ease of maintenance. Their solid design and straightforward operation make them suitable for long-term, heavy-duty use.

Whether you’re working on an excavation, infrastructure project, or industrial site, a well-chosen dewatering pump helps you work safely, efficiently, and dry.