4Boats
SEAFLO 12V Water Pressure Pump 4.0 GPM 55 PSI 42-Series Marine RV SFDP1-040-055-42
SEAFLO 12V Water Pressure Pump 4.0 GPM 55 PSI 42-Series Marine RV SFDP1-040-055-42
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SEAFLO 42 Series Water Pressure Pump
Model: SFDP1-040-055-42 | 4.0 GPM | 55 PSI
The Seaflo 42 Series is a premium 4-chamber positive displacement diaphragm pump designed for high-demand water systems in marine and RV environments. This model features advanced internal bypass technology, which significantly reduces pump cycling (on/off switching) under low-flow conditions. This allows for a smoother, quieter water flow and often eliminates the need for an external accumulator tank.
Key Features
- ✔ Internal Bypass reduces rapid cycling
- ✔ Self-priming up to 6 vertical feet (1.8m)
- ✔ Run-dry capable without damage
- ✔ Rubber mounting base for noise reduction
- ✔ Automatic pressure switch (on-demand)
Technical Specs
| Voltage: | 12V DC |
| Flow Rate: | 4.0 GPM (15.1 LPM) |
| Shut-off Pressure: | 55 PSI (3.8 BAR) |
| Max Draw: | 13.0 Amps |
| Ports: | 1/2"-14 MNPT |
| Max Temp: | 60°C (140°F) |
Compatibility / Fitment Guide
| Application | Use Case | Notes |
|---|---|---|
| Marine / Boating | Pressurised Fresh Water Systems | Supports multiple fixtures |
| RV / Caravans | Potable Water Supply | Quiet operation for night use |
| Agricultural | Spraying & Transfer | Chemically resistant valves |
OEM Cross Reference
| Shurflo Equivalent | 4008 / 4148 Series (e.g. 4148-153-E75) |
| Flojet Equivalent | 4325 Series / 04405143A |
Questions & Answers
Is this a genuine original part?
This is a premium SEAFLO original product, manufactured to international ISO 9001:2015 standards and certified with CE and RoHS for quality assurance.
Do I need an accumulator tank with this pump?
In most applications, no. The internal bypass allows the pump to bleed off excess pressure when demand is low, preventing the "hammering" or rapid cycling typically solved by an accumulator tank.
Can this pump handle saltwater?
Yes, the materials (Santoprene/EPDM) are resistant to corrosion, making it suitable for both fresh and saltwater transfer and washdown applications.
Note: Please verify your plumbing requirements and electrical fuse ratings before installation. Domain: 4boats.co.uk
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