Fire protection systems are designed to respond immediately when an emergency occurs. While the fire pump often gets the most attention, another component works quietly behind the scenes every day to keep the system ready. That component is the jockey pump.
Many building owners and facility managers assume a jockey pump is simply a smaller version of the main fire pump. In reality, it serves a completely different purpose. Without it, even minor pressure changes in the sprinkler system could trigger unnecessary operation of the fire pump, leading to increased wear, maintenance costs, and reduced equipment life.
In this guide, we'll explain what a jockey pump does, why it matters, and how it supports the overall reliability of your fire protection system.
What Is a Jockey Pump?
A jockey pump is a small pressure maintenance pump installed within a fire protection system. Its primary job is to maintain the system's water pressure by compensating for minor pressure losses caused by temperature fluctuations, small leaks, valve seepage, or routine testing.
Unlike the main fire pump, a jockey pump is not designed to supply water during a fire. Instead, it ensures the system remains pressurized so the main fire pump only starts during an actual emergency.
Why Is a Jockey Pump Important?
Fire sprinkler systems must remain pressurized around the clock. Even a slight pressure drop can cause the fire pump controller to interpret the change as a demand for water.
Without a jockey pump, the main fire pump may start repeatedly due to insignificant pressure variations. Frequent cycling can result in:
- Increased wear on the fire pump
- Higher maintenance costs
- Greater energy consumption
- Reduced equipment lifespan
- Unnecessary operational disruptions
A jockey pump prevents these issues by restoring pressure before the main fire pump needs to activate.
How Does a Jockey Pump Work?
The operation of a jockey pump is straightforward yet highly effective.
Here's the process:
- The fire protection system remains fully pressurized.
- A minor pressure drop occurs because of a small leak or temperature change.
- Pressure switches detect the reduction.
- The jockey pump starts automatically.
- It restores the system to its preset pressure.
- Once the desired pressure is reached, the jockey pump shuts off.
If a sprinkler head opens during an actual fire, the pressure drops much more rapidly than the jockey pump can recover. At that point, the fire pump controller activates the main fire pump to provide the required water flow.
Jockey Pump vs Fire Pump
Although they work together, these pumps serve very different purposes.
| Jockey Pump | Fire Pump |
|---|---|
| Maintains system pressure | Supplies high water flow during a fire |
| Small motor and lower flow rate | Large motor with high flow capacity |
| Operates frequently for minor pressure changes | Operates only during fire conditions or testing |
| Prevents unnecessary fire pump starts | Delivers water to sprinklers and standpipes |
Understanding this distinction helps facility managers maintain their systems more effectively.
Where Is a Jockey Pump Installed?
A jockey pump is typically installed alongside the main fire pump within the fire pump room. It connects directly to the fire protection piping system and includes:
- Pressure switches
- Isolation valves
- Check valves
- Pressure gauges
- Pump controller
Its location allows it to monitor and maintain pressure continuously without interfering with the operation of the primary fire pump.
Common Causes of Pressure Loss
Several factors can cause small pressure drops that require the jockey pump to operate.
These include:
- Minor pipe leaks
- Packing leakage around valves
- Temperature changes affecting water volume
- Small seepage through fittings
- Routine inspection or testing
- Aging sprinkler components
These pressure losses are normal and do not indicate a fire emergency.
How Is a Jockey Pump Sized?
A jockey pump is intentionally much smaller than the main fire pump.
According to NFPA 20, the jockey pump should have enough capacity to compensate for minor pressure losses but not enough capacity to satisfy the demand created by an open sprinkler.
Proper sizing ensures:
- Quick pressure recovery
- Stable system operation
- Reliable fire pump activation during emergencies
- Compliance with applicable fire protection standards
Improper sizing can either cause unnecessary cycling or delay fire pump operation.
Signs Your Jockey Pump Needs Attention
Like any mechanical equipment, jockey pumps require regular inspection and maintenance.
Watch for these warning signs:
Frequent Cycling
If the pump starts too often, the system may have a leak or incorrect pressure settings.
Pressure Fluctuations
Inconsistent pressure may indicate controller issues, worn components, or sensor problems.
Unusual Noise or Vibration
Grinding, rattling, or excessive vibration often points to bearing or motor wear.
Failure to Maintain Pressure
If the system pressure continues to drop after the jockey pump starts, repairs should be performed immediately.
Excessive Run Time
A properly functioning jockey pump typically runs for only a short period before shutting off.
Maintenance Best Practices
Routine maintenance helps ensure reliable performance and extends equipment life.
Recommended practices include:
- Inspect pressure gauges regularly.
- Verify pressure switch settings.
- Test automatic start and stop functions.
- Check for piping leaks.
- Inspect valves and electrical connections.
- Lubricate components according to manufacturer recommendations.
- Schedule annual professional inspections.
Preventive maintenance minimizes unexpected failures and helps maintain code compliance.
Does Every Fire Protection System Need a Jockey Pump?
Not every system requires one, but most commercial, industrial, and high-rise fire protection systems include a jockey pump because of the significant operational benefits.
Large facilities such as:
- Hospitals
- Office buildings
- Warehouses
- Manufacturing plants
- Educational institutions
- Airports
- Shopping centers
commonly rely on jockey pumps to maintain system readiness and reduce unnecessary fire pump operation.
Choosing the Right Jockey Pump
Selecting the correct jockey pump depends on several factors, including:
- Building size
- Fire protection system design
- Required pressure levels
- Local fire codes
- NFPA compliance requirements
- Pump controller compatibility
Working with an experienced fire protection pump supplier ensures proper sizing, installation, and long-term reliability.
Why Choose Callaghan Pump?
At Callaghan Pump, we provide complete fire protection pumping solutions designed for commercial and industrial facilities. From system design assistance to installation, testing, maintenance, and replacement, our experienced team helps customers keep their fire protection systems operating reliably and in compliance with industry standards.
Whether you need a jockey pump, fire pump, or a complete fire pump package, we deliver dependable solutions tailored to your facility's requirements.
Final Thoughts
A jockey pump may be one of the smallest components in a fire protection system, but its role is essential. By maintaining system pressure, preventing unnecessary fire pump starts, and supporting overall system reliability, it helps ensure your fire protection equipment is always prepared for an emergency.
Regular inspections, proper sizing, and professional maintenance are key to maximizing the performance and lifespan of both your jockey pump and the entire fire protection system. Investing in the right equipment today helps protect lives, property, and business continuity when it matters most.
Frequently Asked Questions
What is the purpose of a jockey pump in a fire protection system?
A jockey pump maintains water pressure within the fire protection system by compensating for minor pressure losses. This prevents unnecessary activation of the main fire pump.
Can a jockey pump replace a fire pump?
No. A jockey pump only maintains system pressure. It cannot deliver the high water flow required during a fire emergency.
How often should a jockey pump be inspected?
Routine visual inspections should be performed regularly, with comprehensive testing and maintenance conducted according to NFPA 20 recommendations and local fire codes.
Why does my jockey pump keep turning on?
Frequent cycling may indicate a small leak, pressure switch issue, or improper pressure settings. A professional inspection can identify the root cause.
Is a jockey pump required by code?
Many commercial fire protection systems use jockey pumps to maintain system pressure and improve reliability. Requirements depend on system design, applicable codes, and project specifications.




