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Seaflo 12V Water Pressure Pump 33 Series 2.8GPM 45PSI SFDP1-028-045-33 Marine RV
Seaflo 12V Water Pressure Pump 33 Series 2.8GPM 45PSI SFDP1-028-045-33 Marine RV
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Seaflo 33 Series 12V Water Pump
Part Number: SFDP1-028-045-33 | 2.8 GPM | 45 PSI
The Seaflo 33 Series is a general-duty, on-demand positive displacement pump engineered for high-volume water flow in moderate pressure environments. Its 3-chamber diaphragm design allows for smooth, quiet operation while supplying up to 3 fixtures simultaneously, making it an essential component for marine vessels, recreational vehicles, and off-grid water systems.
Key Features
- ✔ On-Demand: Built-in pressure switch automatically cycles pump.
- ✔ Self-Priming: Suction lift up to 6 feet (1.8m).
- ✔ Run Dry Safe: Protects pump during tank depletion.
- ✔ Mounting: Industry-standard mounting pattern for easy retrofit.
- ✔ Protection: Thermal overload protection with auto-restart.
Technical Specs
| Voltage | 12V DC |
| Open Flow Rate | 2.8 GPM (10.6 LPM) |
| Shut-off Pressure | 45 PSI (3.1 BAR) |
| Max Amp Draw | 5.61A |
| Inlet/Outlet Ports | 1/2"-14 MNPT |
| Diaphragm / Valves | Santoprene / EPDM |
Compatibility / Fitment Guide
| Make/System | Application | Notes | |
|---|---|---|---|
| Marine & Boat | Freshwater / Potable Systems | Supports 2-3 fixtures (sink, shower) | |
| RV / Caravans | Main Water Distribution | Intermittent duty cycle recommended | |
| Agriculture | Boom/Spot Spraying | Chemical resistant EPDM valves |
OEM Cross Reference
| Shurflo | 4008 / 4009 Series (Direct Performance Match) |
| Flojet | 03526 Series |
| Standard | Fits standard 3.25" x 4.75" mounting patterns |
Questions & Answers
Is this a genuine original part?
This is a genuine Seaflo 33 Series pump, manufactured to meet global ISO 9001:2008 and RoHS standards.
How do I know if it is compatible?
If your current pump uses 1/2" NPT fittings and runs on a 12V system with a flow rate between 2.5 and 3.0 GPM, this is a direct replacement. Check the mounting pattern (3.25" x 4.75") for exact fitment.
Can the pressure switch be adjusted?
Yes, the 33 Series features an adjustable pressure switch located on the pump head, allowing you to fine-tune the shut-off pressure to your specific system requirements.
Note: Please ensure your battery can handle the 5.61A maximum draw and use a minimum 16 AWG wire for installation. For best performance, use the provided strainer to prevent debris from entering the diaphragm.
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