1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your SEAFLO 55-Series Diaphragm Pump. Designed for reliability and efficiency, this 12V DC pump is suitable for various water systems, including RVs, marine vessels, and off-grid applications. Please read this manual thoroughly before installation and operation to ensure proper use and longevity of the product.
Image 1.1: SEAFLO 55-Series Diaphragm Pump with 1/2" barbed hose adaptors and 50 mesh inlet strainer.
2. Safety Information
- Always disconnect power before installing, servicing, or performing maintenance on the pump.
- Ensure all electrical connections are secure and properly insulated to prevent short circuits.
- Do not pump flammable liquids or operate the pump in an explosive atmosphere.
- Protect the pump from freezing temperatures.
- Wear appropriate personal protective equipment during installation and maintenance.
3. Specifications
| Specification | Value |
|---|---|
| Model Number | SFDP1-055-060-55 |
| Voltage | 12V DC |
| Open Flow Rate | 5.5 GPM (20.8 LPM) |
| Shut-off Pressure | 60 PSI (4.2 BAR) |
| Priming Capabilities | 9 FT (2.7 M) Suction Lift |
| Max Draw | 17A |
| Material (Valves) | EPDM |
| Material (Diaphragm) | Santoprene |
| Ports | 1/2"-14 MNPT Threaded |
| Max Recommended Temperature | 140°F (60°C) |
| Dimensions (L x W x H) | 8.5" x 5.75" x 5.16" |
| Item Weight | 6.1 Pounds |
Image 3.1: Comparative specifications for SEAFLO 55-Series pump models.
4. Included Components
The SEAFLO 55-Series Diaphragm Pump package includes the following items:
- SEAFLO 55-Series Diaphragm Pump
- Installation Instructions (this manual)
- (2) 1/2" Barbed Hose Adaptors
- 50 Mesh Inlet Strainer
- 16 AWG, 9" (22.8 cm) Leads
5. Key Features
5.1 High Flow Rate with 5-Chamber Design
The pump features an advanced 5-chamber diaphragm design, enabling a high flow rate of 5.5 GPM. This design allows the pump to supply water to multiple fixtures simultaneously, reducing pump cycling and providing consistent water pressure for various uses like showering, washing, or dishwashing.
Image 5.1: The 5-chamber diaphragm design for efficient water flow.
5.2 Heavy-Duty Smart Pressure Switch with Built-in Bypass
The integrated Smart Pressure Switch automatically activates the pump when water is needed and stops it when demand ceases. This non-adjustable switch provides optimal pressure control. A built-in bypass mechanism minimizes rapid cycling by maintaining consistent pressure, allowing water to flow back from the outlet to the inlet if necessary. This extends the pump's lifespan and ensures a seamless water supply, offering a lifetime of over 200,000 on/off cycles.
Image 5.2: The Smart Pressure Switch ensures automatic operation and consistent pressure.
Image 5.3: The internal bypass mechanism helps prevent excessive cycling and maintains smooth operation.
5.3 Self-Priming & Run Dry Capability
The pump's self-priming feature allows for a suction lift of up to 9 feet, offering flexibility for remote installations where the pump may be positioned above the water source. Additionally, the pump is designed to run dry without sustaining damage, protecting internal components during low-water conditions or accidental dry operation.
5.4 Quiet & Efficient Operation with Noise Reduction
Engineered for quiet performance, the SEAFLO 55-Series pump operates at a noise level comparable to a ceiling fan (65 dB). A semi-rigid rubber mounting base reduces vibrations, significantly lowering noise levels and contributing to a peaceful environment, making it suitable for indoor use in RVs or boats.
Image 5.4: The rubber mounting bracket minimizes vibration and noise.
5.5 Durable & Corrosion-Resistant Materials
Constructed with premium Santoprene for the diaphragm and EPDM for the valves, the pump is built to withstand harsh marine and RV environments. These materials provide excellent abrasion and corrosion resistance, ensuring durability and long-lasting reliability in both freshwater and saltwater applications.
Image 5.5: Internal components made from durable, corrosion-resistant materials.
6. Installation
6.1 Mounting
- Mount the pump in a dry, well-ventilated area.
- Ensure the mounting surface is stable and secure. The rubber mounting base helps reduce vibration and noise.
- Position the pump as close as possible to the water source to minimize suction lift, though it can self-prime up to 9 feet.
- Allow adequate space around the pump for ventilation and future maintenance.
Image 6.1: Pump dimensions for planning installation space.
6.2 Plumbing Connections
- Install the 50 mesh inlet strainer on the suction side of the pump to prevent debris from entering.
- Use appropriate 1/2"-14 MNPT threaded fittings for secure connections. The included barbed hose adaptors can be used for hose connections.
- Ensure all plumbing connections are watertight to prevent leaks and maintain priming.
- Avoid kinks or sharp bends in hoses, which can restrict flow.
6.3 Electrical Connections
- Connect the pump to a 12V DC power source.
- Ensure the power source can provide the maximum draw of 17A.
- Install an appropriately sized fuse or circuit breaker in the positive (+) power line, close to the power source, to protect the pump and wiring.
- Connect the red wire to the positive (+) terminal and the black wire to the negative (-) terminal.
7. Operating Instructions
- Once installed and connected, ensure the water source is available.
- Turn on the power to the pump. The pump will begin to self-prime.
- Open a faucet or fixture to allow air to escape the system until a steady stream of water flows.
- Close the faucet. The Smart Pressure Switch will detect the pressure buildup and automatically shut off the pump.
- The pump will automatically restart when a faucet is opened and the system pressure drops.
- The pump can run dry without damage, but continuous dry running is not recommended.
8. Maintenance
8.1 Regular Checks
- Periodically inspect all plumbing connections for leaks.
- Check electrical connections for corrosion or looseness.
- Clean the inlet strainer regularly to ensure unrestricted water flow and prevent pump damage.
8.2 Winterization
- In freezing conditions, drain all water from the pump and plumbing system.
- Alternatively, introduce non-toxic RV/marine antifreeze into the system according to the antifreeze manufacturer's instructions.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not run | No power, blown fuse/breaker, loose wiring | Check power supply, replace fuse/reset breaker, tighten connections. |
| Low flow or no water | Clogged inlet strainer, air leak in suction line, low water source, kinked hose | Clean strainer, check suction line for leaks, ensure adequate water supply, straighten hoses. |
| Pump cycles on and off rapidly | Small leak in system, restricted flow on discharge side, air in system | Check for leaks, ensure discharge is open, bleed air from system. The built-in bypass minimizes this, but severe issues may still cause it. |
| Pump runs but no water | Loss of prime, air leak in suction, clogged inlet | Re-prime the pump, check suction line, clean inlet strainer. |
10. Versatile Applications
The SEAFLO 55-Series pump is designed for a wide range of applications due to its robust performance and durable construction:
- RV/Motorhome: Provides reliable potable water supply for sinks, showers, and toilets.
- Marine: Ideal for fresh and saltwater systems on boats and yachts, including washdown and potable water.
- Off-Grid Systems: Suitable for cabins, tiny homes, and other off-grid setups using rain collection or well water.
- Washdown Systems: High flow and pressure are effective for cleaning surfaces.
- Potable Freshwater Systems: Ensures consistent water pressure for drinking and cooking.
- Shower Sub-Pump: Can be used to boost shower pressure.
- Irrigation: Suitable for small-scale irrigation needs.
Image 10.1: Visual representation of the pump's diverse applications.
11. Warranty and Support
The SEAFLO 55-Series Diaphragm Pump comes with a 4-Year Limited Warranty. This warranty covers defects in materials and workmanship under normal use. For warranty claims or technical support, please contact SEAFLO customer service. Keep your proof of purchase for warranty validation.
