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Electric and diesel Fire Pump Maintenance

Fire pumps and the electric motors or diesel engines that drive them are the heart of a facility’s fire suppression system. These systems save lives and extinguish fires, yet, a surprising number of facilities don’t have fire suppression systems in proper working order. 

With diesel fire pump maintenance, you have a safeguard against fires. Secure a maintenance plan that fits your facility and your budget by partnering with the qualified maintenance team at LionHeart Critical Power Specialists. 

Begin Your Partnership 

man in a grey hard hat looking at a large red commercial generator

Why is Fire Pump Maintenance Important?

Fire pumps ensure ample water pressure and volume are delivered to your entire fire protection system. 

Properly operating fire protection systems can reduce the average property loss by 71% in the event of a fire, however improper fire pump maintenance can result in less effectiveness – or even failure – for the fire protection system. 

Whether you require diesel fire pump maintenance or have a unit that is driven by an electric motor, LionHeart offers the expertise to keep your pump operating efficiently.  

Our preventative maintenance practices follow proven guidelines for diesel fire pump maintenance of emergency generator engines. LionHeart technicians perform a comprehensive fire pump inspection of the diesel engine, as well as full maintenance to include replacement of engine oil, oil filters, and fuel filters. With approval, an operational churn test (no flow test) is performed to ensure proper engine and control operation. 

Additionally, we provide comprehensive services for all electric driven units to ensure your drive and drive control systems are functioning at peak performance. Our Field Service Engineers (FSEs) are ESGA certified to provide repairs to your control system and power sources, including repair, maintenance, and/or replacement of the Automatic Transfer Switch (ATS)

You can view our blog to learn more about the differences between an electric motor pump and diesel pump. 


NFPA Electric and Diesel Fire Pump Maintenance Standards



If you are considering a maintenance plan for your fire pump, LionHeart recommends that all clients become familiar with baseline requirements from the National Fire Protection Agency (NFPA) called NFPA 25. This is the standard for inspection, testing, and maintenance of water-based fire protection systems.

It will also document any requirements that may not be covered under your current maintenance or service agreements. These additional requirements are typically handled by clients, due to frequent maintenance intervals (weekly, monthly, and quarterly). Requirements include, but are not limited to:

  • Running the diesel fire pump
    engine for 30 minutes each week.
  • Running the electric fire pump for
    10 minutes each month.
  • Testing the diesel fuel tank float
    switch(s) and interstitial space float or supervisory signals each quarter. 
By meeting NFPA requirements, you will not only be assured your system meets all critical inspection and testing points, but you will also maximize the system’s reliability.

Additional Testing Guidance

When completing weekly, monthly, and quarterly tests, we recommend that you or your designated staff member receive NFPA training, prior to examining.

Testing can be completed for a variety of functions (with and without water) by checking temperature and pressure readings, motor operations, operating speeds, leaks, sound, vibration level, and more. 

NoteLionHeart does not perform annually required NFPA 25 flow testing, but we recommend our annual diesel fire pump maintenance for your engine be performed in conjunction with annual flow test. This coordination ensures a qualified mechanic is onsite and prepared to address any engine or engine control issues which may occur during the annual required flow test.



 LionHeart is well-versed in the repair, rebuild, and complete replacement of fire pump engines. To ensure system readiness and reliability, LionHeart has also developed extensive knowledge of NFPA 20, which is the standard for the installation of stationary pumps for fire protection. Engine failures, long-term repairs, and complete replacement projects require the use of portable, rental fire pump systems. We supply and install, both, so you are never without the resources you need to keep your facilities and your staff safe. 

Maintain Your Fire Pumps with Lionheart Critical Power Specialists

From preventative maintenance to providing you with guidance for the NFPA requirements you will need as an organization, LionHeart Critical Power Specialists are here to help you every step of the way. 

We are staffed by EGSA-certified FSEs are mechanical, electrical, and diesel engine experts who are well-versed in the unique installation and operational aspects of diesel engine fire pumps and motor driven fire pumps. 

Talk with our team about your unique pump and suppression system requirements for a customized maintenance plan. 

To get started or to learn more about how we can assist you, contact us online, email us at info@LHCPS.com or call 844-LHPOWER (844-547-6937), today!

Unmatched Expertise

We believe no organization should ever be at risk due to the failure of their critical power systems. LionHeart is the team you need for peace of mind.

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