1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Flojet Roller Sprinkler Pump. Please read this manual thoroughly before attempting to install or operate the pump. Keep this manual for future reference.
2. Safety Information
WARNING: Failure to follow these instructions may result in serious injury or property damage.
- Always disconnect power before servicing the pump.
- Ensure the pump is installed in a dry, well-ventilated area.
- Do not operate the pump with flammable liquids.
- Verify correct voltage (12V or 24V) before connecting to power.
- Use appropriate fuse as specified (7 Amps for 24V model R3B21503A).
- Keep hands and loose clothing away from moving parts.
- Do not exceed the maximum liquid temperature of 170°F (77°C).
3. Product Overview
The Flojet Roller Sprinkler Pump is designed for various fluid transfer applications, offering reliable performance and durability. Below are images illustrating the pump and its key features.

Figure 3.1: Front view of the Flojet R3B21503A pump, showing the main body and the attached specification label. The label details model number, voltage, flow rate, pressure, current draw, fuse rating, and maximum liquid temperature.

Figure 3.2: Side view of the pump, highlighting the electrical wiring connections.

Figure 3.3: Top view of the pump, clearly showing the blue inlet and outlet ports.

Figure 3.4: Angled view of the pump, illustrating the integrated mounting bracket for secure installation.

Figure 3.5: Bottom view of the pump, displaying the serial number (R2019236).
Video 3.1: A short video demonstrating the physical handling and various angles of the Flojet Roller Sprinkler Pump.
4. Specifications
| Feature | Specification |
|---|---|
| Brand Name | Flojet |
| Model Numbers | R3B21503A (24V), R3B21504A (12V), R3B21502A |
| Voltage (R3B21503A) | 24V |
| Flow Rate (R3B21503A) | 2.2 GPM (Gallons Per Minute) |
| Pressure (R3B21503A) | 50 PSI / 3.5 BAR |
| Max Current Draw (R3B21503A) | 4 Amps |
| Recommended Fuse (R3B21503A) | 7 Amps |
| Max Liquid Temperature | 170°F (77°C) |
| DIY Supplies Category | Electrical |
| Origin | Mainland China |
| Warranty | 3 months |
5. Installation
5.1 Mounting
- Select a dry, secure location for mounting the pump.
- Ensure adequate ventilation around the pump.
- Use the integrated mounting bracket to secure the pump to a stable surface.
- Mount the pump in a position that allows for easy access for maintenance and inspection.
5.2 Plumbing
- Connect appropriate hoses to the inlet and outlet ports. Ensure connections are tight to prevent leaks.
- Use flexible hoses to minimize vibration and noise.
- Install a filter on the inlet side to protect the pump from debris.
- Ensure the plumbing system is free of kinks or restrictions.
5.3 Electrical Connection
- Confirm the pump's voltage (12V or 24V) matches your power supply.
- Connect the pump to a fused power source. For the 24V R3B21503A model, a 7 Amp fuse is recommended.
- Ensure all electrical connections are secure and insulated to prevent short circuits.
- If unsure, consult a qualified electrician.
6. Operation
- Priming the Pump: Before first use, ensure the pump is properly primed. This usually involves filling the inlet line and pump head with liquid to remove air.
- Power On: Connect the pump to the power supply. The pump should start operating.
- Monitor Performance: Observe the pump for proper flow and pressure. Listen for unusual noises.
- Power Off: Disconnect the pump from the power supply when not in use or for maintenance.
7. Maintenance
- Regular Inspection: Periodically check the pump for leaks, loose connections, or signs of wear.
- Clean Inlet Filter: If an inlet filter is installed, clean it regularly to prevent clogging and maintain optimal flow.
- Winterization (if applicable): If operating in freezing conditions, drain the pump and lines to prevent damage from ice expansion.
- Motor Care: Keep the motor clean and free from debris. Do not obstruct ventilation openings.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not start | No power; Blown fuse; Motor fault | Check power supply; Replace fuse (ensure correct rating); Contact support. |
| Low flow or pressure | Clogged inlet filter; Air in system (not primed); Kinked hose; Worn pump components | Clean filter; Prime pump; Check hoses for obstructions; Contact support for parts. |
| Pump runs but no water flows | Loss of prime; Inlet blocked; Suction leak | Re-prime the pump; Check inlet for obstructions; Inspect suction line for leaks. |
| Excessive noise or vibration | Loose mounting; Air in system; Debris in pump; Worn bearings | Tighten mounting bolts; Bleed air from system; Inspect pump for debris; Contact support. |
9. User Tips
- Always ensure the pump is adequately primed before starting to prevent dry running and potential damage.
- Regularly check and clean any inline filters to maintain optimal pump efficiency and longevity.
- For prolonged periods of inactivity, especially in cold environments, drain the pump and associated lines to prevent freezing and damage.
10. Warranty and Support
This Flojet Roller Sprinkler Pump comes with a 3-month warranty from the date of purchase, covering manufacturing defects. For warranty claims, technical support, or inquiries regarding replacement parts, please contact the seller:
Zhengzhou Xingye Machinery Equipment Co., Ltd.Email: 16686685783@163.com
WhatsApp: +86 17680648261
Please provide your model number and purchase date when contacting support to expedite assistance.





