1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your SEAFLO 12V 1.2 GPM 35 PSI Water Pressure Diaphragm Pump. This pump is designed for reliable and efficient water flow in various applications, including RVs, boats, and off-grid systems. Please read this manual thoroughly before installation and use to ensure proper function and safety.
2. Safety Information
Observe the following safety precautions to prevent injury and damage to the pump:
- Always disconnect power before installing, servicing, or performing maintenance on the pump.
- Ensure the power supply matches the pump's voltage requirements (12V DC).
- Do not pump flammable liquids. This pump is designed for water transfer.
- Protect electrical connections from water exposure.
- Ensure proper ventilation around the pump to prevent overheating.
- Wear appropriate personal protective equipment during installation and maintenance.
3. Product Overview and Components
The SEAFLO 12V 1.2 GPM 35 PSI Water Pressure Diaphragm Pump is a compact and durable unit. Key components include:
- Motor: Features a new copper core motor for durability and efficiency.
- Diaphragm: Made from Santoprene for reliable performance.
- Valves/Seals: Constructed from EPDM/Viton for chemical resistance.
- Housings: Made from Nylon/Polypropylene for durability.
- Pressure Switch: Adjustable for customizable pressure settings.
- Inlet/Outlet Ports: 3/8" hose barb connections.
- Mounting Base: Rubber mounting bracket base minimizes vibration and reduces noise.
- Thermal Protection: Built-in to prevent overheating.
Image 3.1: Overview of the SEAFLO 12V 1.2 GPM 35 PSI Water Pressure Diaphragm Pump.
Image 3.2: Diagram illustrating the durable and corrosion-resistant materials used in the pump's construction, including Nylon/Polypropylene housings, Santoprene diaphragm, EPDM/Viton valves/seals, and stainless steel screws. Also shows built-in thermal protection and 2-pin wire connections.
4. Specifications
| Feature | Specification |
|---|---|
| Model | SFDP1-012-035-21 |
| Voltage | 12V DC |
| Open Flow | 1.2 GPM (4.5 LPM) |
| Shut-Off Pressure | 35 PSI (2.4 BAR) |
| Self-Priming | Up to 4 ft (1.2 m) |
| Diaphragm Material | Santoprene |
| Inlet/Outlet Ports | 3/8" Hose Barb |
| Max Temperature | 140°F (60°C) |
| Max Current Draw | 4.0A |
| Dimensions (L x W x H) | 6.65" x 3.86" x 2.44" |
| Item Weight | 1.32 Pounds |
Image 4.1: Performance curve illustrating flow rate (GPM/LPM) versus pressure (PSI/BAR) for the 12V pump, alongside a table detailing flow and current draw at various pressure points.
Image 4.2: Detailed technical drawing showing the dimensions of the SEAFLO diaphragm pump in both inches and millimeters.
5. Installation
5.1 Mounting the Pump
The pump should be mounted in a dry, well-ventilated area, protected from direct sunlight and freezing temperatures. The rubber mounting bracket base helps minimize vibration and noise.
- Select a secure, flat surface for mounting.
- Position the pump and mark the locations for the mounting screws. Refer to the dimensions in Section 4.
- Secure the pump using appropriate fasteners (not included) through the rubber mounting feet. Do not overtighten.
Image 5.1: The pump features a rubber mounting bracket base designed to minimize vibration and reduce noise during operation.
5.2 Plumbing Connections
Use flexible hose on both the inlet and outlet to reduce vibration and noise. Ensure all connections are secure to prevent leaks.
- Connect the inlet hose (suction side) to the pump's inlet port. The pump is self-priming up to 4 feet.
- Connect the outlet hose (discharge side) to your water system.
- Use 3/8" hose barb fittings for all connections. Secure hoses with hose clamps to prevent disconnections and leaks.
- Consider installing a filter on the inlet side to protect the pump from debris.
5.3 Electrical Connections
Ensure correct polarity and use appropriate wire gauges for your installation.
- Connect the red wire from the pump to the positive (+) terminal of your 12V DC power source.
- Connect the black wire from the pump to the negative (-) terminal of your 12V DC power source.
- Install an appropriate fuse (e.g., 5A) in the positive line close to the power source for circuit protection.
- Ensure all electrical connections are clean, tight, and protected from moisture.
6. Operating Instructions
The SEAFLO pump features an adjustable pressure switch for automatic operation.
- Initial Priming: Ensure the water source is available. Open a faucet in your system to allow air to escape. Turn on the pump. The pump will self-prime and begin to move water. Once water flows steadily from the faucet, close it.
- Automatic Operation: The pump will automatically turn on when a faucet is opened and the system pressure drops. It will turn off when the faucet is closed and the system pressure reaches the shut-off setting.
- Adjusting Pressure Switch: The pressure switch is factory set to 35 PSI. If adjustment is needed, locate the adjustment screw on the pressure switch housing.
- Turn the screw clockwise to increase the shut-off pressure.
- Turn the screw counter-clockwise to decrease the shut-off pressure.
Note: Adjustments should be made incrementally. Excessive adjustment can damage the pump or lead to inconsistent operation. The pressure range is typically 17-80 PSI.
Image 6.1: Detail of the adjustable pressure switch on the SEAFLO pump, allowing users to customize water flow and pressure settings.
7. Maintenance
Regular maintenance ensures optimal performance and extends the life of your pump.
- Inspect Connections: Periodically check all plumbing and electrical connections for tightness and signs of wear or corrosion.
- Clean Inlet Filter: If an inlet filter is installed, clean it regularly to prevent debris from entering the pump and reducing flow.
- Winterization: In freezing conditions, drain all water from the pump and plumbing system to prevent damage. Running RV antifreeze through the system is recommended.
- Storage: If storing the pump for an extended period, ensure it is clean, dry, and stored in a non-freezing environment.
8. Troubleshooting
Refer to the following table for common issues and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump runs but no water flows. |
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| Pump cycles on and off rapidly (short cycling). |
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| Low flow or pressure. |
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| Pump does not run. |
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| Excessive noise or vibration. |
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9. Warranty and Support
The SEAFLO 12V 1.2 GPM 35 PSI Water Pressure Diaphragm Pump is backed by a 4-Year Limited Warranty. This warranty covers defects in materials and workmanship under normal use.
For warranty claims, technical assistance, or replacement parts, please contact SEAFLO customer support. Keep your proof of purchase for warranty validation.
For more information, visit the official SEAFLO website or contact your local dealer.
