Mag Drive Pump FAQ

Everything You Need to Know about a Mag Drive Pump

What is a mag drive pump?

A mag drive pump derives its name from the magnets that are used to rotate the impeller. This innovative design features magnets at the end of the motor shaft and the impeller. This creates a magnetic connection between the motor and the drive—when the drive magnets rotate, the impeller rotates. The result is a pump design that allows sealless operation.

What are the main features of a mag drive pump?

Sealless Technology

The magnetic connection in a mag drive pump eliminates the need for a mechanical seal on the shaft. By providing two separate contained areas for the impeller and motor, the pump offers a fully sealed environment that does not rely on a mechanical seal. The result is a pump that can handle the harshest chemicals without the inevitable leaks that occur with the use of a mechanical seal.

Run-dry Capability

Operator error or other system issues can result in a run-dry situation. For some pumps, this scenario can prove disastrous. Very quickly, the pump can be damaged or destroyed. Some mag drive pumps, however, can withstand a run-dry situation without issue. In fact, some models can run dry for hours without suffering damage.

Chemical Resistance

A chemical mag drive pump is ideal for transferring harsh chemicals. With no mechanical seal to be worn away by strong chemicals, a mag drive pump is the go-to-choice for tough chemical applications. Its high resistance decreases maintenance and replacement costs, and the absence of leaks increases safety.


Other pump designs are susceptible to harsh chemical environments and run-dry situations. These tough environments can shorten the lifespan of some pumps. In contrast, a mag drive pump is built to withstand each of these scenarios, offering durability that operators can count on for top performance over the long haul.

Low Maintenance

A chemical mag drive pump can deliver years of maintenance-free operation. Because it is resistant to chemicals, it is not susceptible to corrosion. Plus, it has no mechanical seal that would have to be replaced periodically. With little to no maintenance, pump owners can count on a mag drive pump for continuous, smooth operation.

What are the benefits of a mag drive pump?

Eliminates mechanical seal

Because a mag drive pump has no seal, the seal can never leak, and the seal will never need to be replaced. This significantly reduces maintenance costs over the life of the pump.

Improves productivity

Mechanical seals inevitably fail and must be replaced, which results in downtime and lost productivity. A mag drive pump eliminates these disruptions by providing sealless operation, effectively improving productivity.

Enhances safety

A chemical mag drive pump is designed to handle harsh chemical transfers without the risk of leaks. The lack of seal provides a safer environment for employers, their workforce, and the public.

Prevents fugitive emissions

A mag drive pump helps prevent the release of VOCs and VHAPs. This increases the overall safety of an organization and aids in compliance to local and federal health standards.

Simplifies selection

Choosing the right mechanically sealed pump for a specific application can be complex, due to the variety of factors that affect the seal. A mag drive pump eliminates these seal options, making the selection process easier.

Runs dry

For some pump types, a run-dry situation spells the end of the pump’s life. Some mag drive pumps can run dry for hours without issue, which is particularly beneficial for applications where pumps are not under constant supervision.

Resists corrosion

Heavy-duty applications that involve corrosive and hazardous fluids are too harsh for many pump designs. A chemical mag drive pump offers a resilient option for tough jobs that require tough solutions.

What are common applications for a mag drive pump?

Aquariums & Aquatic Life

A mag drive pump provides the precision circulation that is crucial for aquatic environments. These durable, low-maintenance pumps are ideal for aquatic applications including focus tanks, aquatic life zones, and waste water treatment.

Discover how aquariums are tapping into the benefits of mag drive pumps.

Read more

Chemical Manufacturing & Distribution

For chemical applications, a sealless mag drive pump is ideal. These heavy-duty pumps are equipped to handle the transfer of harsh substances, without the potential for hazardous leaks.

Get an inside look at the benefits of a mag drive pump for chemical transfers.

Read more

Diesel Exhaust Fluid/AdBlue

DEF/AdBlue is crucial to myriad machinery and equipment operations and requires special handling for safe transfers. Built for harsh environments, a mag drive pump has become the go-to solution for diesel exhaust fluid applications, including dispensing, blending, and transfers.

Find out how mag drive pumps have proven ideal for DEF systems.

Read more

Electroplating & Anodizing

In this industry, there’s no margin for error. Mag drive pumps offer precision pumping for the transfer of harsh chemicals used in electroplating and anodizing applications, from filters, to sumps, to eductors.

Learn how a mag drive pump meets the challenges of this demanding industry.

Read more


For safe, effective mining applications, a mag drive pump is key. These heavy-duty pumps offer the durability needed for transferring harsh chemicals and unloading tank trucks and rail cars.

Go behind the scenes of the mining industry to discover how a mag drive pump is key to mineral extraction.

Read more

Power Plants

Power plant applications require reliable pumps to prevent safety hazards and avoid costly down time. A mag drive pump offers the necessary durability to pump treatment chemicals, clean heat exchangers, and transfer antifreeze.

Discover how a mag drive pump meets the challenge of harsh fluid transfers for power plant applications.

Read more

Printed Circuit Boards & Electronics

These applications require precision performance to meet stringent industry standards. A mag drive pump offers accuracy and reliability to filter solutions, transfer chemicals, provide appropriate pressure, and eliminate microbubbles.

Read about the cutting-edge solutions a mag drive pump is providing for circuit board manufacturers.

Read more

Renewable Energy

Manufacturers and suppliers are looking to sustainable solutions to create a greener future. A mag drive pump is ideal for diverse renewable energy applications involving bio-fuels, wind turbines, and solar panels.

Get a glimpse of a greener future made possible by mag drive pump sustainable solutions.

Read more

Steel Processing

The harsh applications of the steel processing industry require heavy-duty pumps to withstand highly corrosive chemicals. A mag drive pump steps up to the challenge for galvanizing, steel pickling, and managing waste acid and wastewater.

Find out how steel manufacturers are using a mag drive pump to strengthen their systems and improve production.

Read more

Water & Waste Water Applications

When facilities need to manage large volumes of water, a mag drive pump is key. These pumps offer constant flow and durability for the applications involved, including chemical transfers, sampling, and emptying batch treatment tanks.

Check out the benefits water treatment facilities are reaping from the use of a mag drive pump.

Read more

Other Industries

Robust solutions are needed in a variety of industrial settings to safely handle corrosive and toxic fluids. Wherever processes require harsh chemicals, a mag drive pump can meet the demands to provide reliability and safety. The applications are nearly limitless.

Get the scoop on how these pumps offer a “triple play” for industrial applications.

Read more

How do I choose the best mag drive pump for my application?

Selecting the right mag drive pump for a particular application is key. Fortunately, it’s also a simple process. Use an online pump selector to enter the basic application parameters and discover the best mag drive pump to use for your setting.

What parameters should you consider? Check out this guide for more details on factors that influence pump selection.

What are best practices for mag drive pump operation?

For successful mag drive pump operation, follow this seven-step process.

For detailed, how-to assembly and maintenance videos, visit this resource page.

While adhering to these best practices will minimize operational problems, it is important to understand the most common issues you may encounter with a mag drive pump. Learning how to troubleshoot in these situations is an important part of best practices for mag drive pump applications. Use this troubleshooting guide for:

  • Insufficient pressure
  • Insufficient discharge
  • Loss of prime
  • Excessive power consumption
  • Vibration/Noise

More Questions? We’re here to help

If you need additional information about mag drive pump operation or repair, our experts are standing by to assist you. Contact our team with general inquiries about mag drive pumps, or get detailed answers and support via our toll-free Technical Service Hot Line, 1-800-888-3743.

To learn more about our mag drive pump series, use the guide below.

Meet Finish Thompson’s Mag Drive Pumps

Finish Thompson DB Series Mag Drive PumpDB Series – Flooded Suction Design Mag Drive Pump Series

  • High efficiency
  • Hours of run-dry capability
  • Strongest neodymium magnets
  • Rugged construction

Finish Thompson MSDB Series Mag Drive PumpMSDB Series – Multi-stage Design Mag Drive Pump Series

  • Much higher heads at lower flows
  • Heads up to 300 feet (91.5 meters)
  • 2- and 3-impeller models
  • 5-year warranty

Finish Thompson SP Series Mag Drive PumpSP Series – Self Priming Mag Drive Pump Series

  • Run-dry capability
  • Lightning-fast priming
  • No seals, so there are no leaks
  • Powerful deep vacuum, capable of lifting fluid from as deep as 25 ft. (7.6 meters)

Finish Thompson ULTRAChem Series Mag Drive PumpULTRAChem® Series – ANSI Dimensional Mag Drive Pump Series

  • ETFE lining for superior corrosion resistance
  • Tough ductile iron construction
  • Run-dry capability
  • Sealless design for leak-free performance