1. Introduction
Thank you for choosing the SEAFLO 31-Series DC Diaphragm Pump. This self-priming, high-pressure water pump is designed for reliable performance in various applications, including RV water systems, boats, agricultural spraying, and cleaning. It features a built-in automatic pressure switch for on-demand operation and a run-dry safe design for enhanced durability. Please read this manual thoroughly before installation and operation to ensure safe and efficient use of your pump.
Figure 1: SEAFLO 31-Series DC Diaphragm Pump. This image shows the compact design of the pump with its inlet and outlet ports, and the electrical connection area.
2. Safety Instructions
WARNING: Failure to follow these instructions may result in electric shock, fire, serious injury, or death.
- Always disconnect power before servicing the pump.
- Ensure the power source matches the pump's voltage (110V).
- Do not operate the pump in an explosive atmosphere, such as in the presence of flammable liquids, gases, or dust.
- Protect electrical connections from moisture.
- Do not pump flammable liquids or chemicals that are incompatible with the pump's materials (EPDM valves, Santoprene diaphragm).
- Ensure proper ventilation around the pump to prevent overheating.
- Keep hands and loose clothing away from moving parts.
- This pump is designed for water transfer. Do not use it for other fluids without consulting the manufacturer.
3. Setup and Installation
3.1 Mounting
- Mount the pump in a dry, well-ventilated area, protected from direct sunlight and freezing temperatures.
- Utilize the industry-standard mounting pattern for quick and secure installation. Ensure the mounting surface is stable and can support the pump's weight.
- Mount the pump with the head down if possible, to prevent potential leaks from dripping onto the motor.
- Allow sufficient space around the pump for ventilation and future maintenance.
3.2 Plumbing Connections
- Use appropriate threaded connections and fittings for your system. The pump is supplied with multiple fittings for seamless integration.
- Ensure all connections are tight to prevent leaks and air ingress, which can affect pump performance.
- Install a filter on the inlet side to protect the pump from debris.
- The pump is self-priming up to 6 feet (1.5m) suction lift. Position the pump as close to the water source as possible for optimal performance.
- Avoid kinks or sharp bends in the hoses, which can restrict flow.
3.3 Electrical Connections
- Connect the pump to a 110V AC power supply. Refer to the pump's label for specific voltage and current requirements.
- Ensure the electrical circuit is protected by an appropriately sized fuse or circuit breaker.
- All electrical wiring should be performed by a qualified electrician and comply with local electrical codes.
- Protect all electrical connections from water and moisture.
4. Operating Instructions
4.1 Initial Start-Up
- Ensure all plumbing and electrical connections are secure.
- Open any valves in the discharge line to allow air to escape.
- Turn on the power supply to the pump.
- The pump will begin to prime itself. Once water flows steadily and all air is purged from the system, close any open valves in the discharge line.
- The built-in automatic pressure switch will stop the pump once the system reaches its shut-off pressure (200 PSI).
4.2 Automatic Operation
- The pump's automatic pressure switch will activate the pump when the system pressure drops (e.g., when a faucet is opened) and deactivate it when the pressure is restored (e.g., when a faucet is closed).
- This provides on-demand water flow and prevents unnecessary motor wear.
4.3 Run-Dry Safe Feature
- The pump is designed to be run-dry safe, meaning it will not be damaged if the water supply runs low or is depleted. However, continuous dry running is not recommended and should be avoided if possible to prolong pump life.
4.4 Quiet Operation
- The SEAFLO 31-Series pump is engineered for low noise and vibration, ensuring a disruption-free experience in RV and marine environments.
5. Maintenance
Regular maintenance ensures optimal performance and extends the life of your SEAFLO pump.
- Inlet Filter: Periodically inspect and clean the inlet filter to prevent debris from entering the pump and reducing flow.
- Connections: Check all plumbing and electrical connections regularly for tightness and signs of wear or corrosion.
- Winterization: In freezing conditions, drain all water from the pump and plumbing system to prevent damage from ice expansion. Running RV antifreeze through the system is also an option.
- Pump Head: Inspect the pump head, EPDM valves, and Santoprene diaphragm for any signs of wear or damage. Replace components as needed.
- General Cleaning: Keep the exterior of the pump clean and free of dirt and debris.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not turn on. | No power, loose electrical connection, blown fuse/tripped breaker, faulty pressure switch. | Check power supply. Verify all electrical connections. Replace fuse or reset breaker. Test or replace pressure switch. |
| Low flow or no pressure. | Clogged inlet filter, air leak in suction line, restricted discharge line, low voltage, worn pump head/diaphragm. | Clean inlet filter. Check suction line for leaks. Clear any obstructions in discharge line. Verify correct voltage. Inspect and replace pump head components if necessary. |
| Pump runs continuously or cycles rapidly. | Leak in plumbing system, faulty pressure switch, air in system, restricted flow. | Check for leaks in pipes, fittings, or fixtures. Test or replace pressure switch. Bleed air from the system. Ensure discharge line is not overly restricted. |
| Pump gets hot and stops pumping (especially in summer heat). | Overheating due to continuous operation, insufficient ventilation, high ambient temperature, motor overload. | Allow pump to cool down. Ensure adequate ventilation around the pump. Reduce continuous run time if possible. Check for any obstructions causing the motor to work harder. |
| Excessive noise or vibration. | Loose mounting, air in system, debris in pump, worn bearings. | Tighten mounting screws. Bleed air from the system. Inspect pump for foreign objects. If noise persists, contact support. |
7. Specifications
| Feature | Detail |
|---|---|
| Model | SFDPA1-015-200-31 |
| Voltage | 110V |
| Flow Rate | 1.5 GPM (Gallons Per Minute) |
| Shut-Off Pressure | 200 PSI |
| Priming Capabilities | 6 feet (1.5m) suction lift |
| Power Source | Corded Electric |
| Material | Stainless Steel (housing), EPDM (valves), Santoprene (diaphragm) |
| Style | Diaphragm Pump |
| Specific Uses | RV water systems, Boats, Agricultural spraying, Sanitation, Cleaning, RV leveling |
| Included Components | 1 Pump |
8. Warranty and Support
SEAFLO products are manufactured to high-quality standards. For warranty information, technical support, or service inquiries, please refer to the warranty card included with your product or visit the official SEAFLO website.
Online Resources: For additional information and support, you may visit the SEAFLO Store on Amazon.
