SEAFLO 53-Series 12V Diaphragm Water Pump — 7.0 GPM, 60 PSI, Self-Priming Continuous-Duty

The SEAFLO 53-Series 12V diaphragm pump delivers up to 7.0 GPM at 60 PSI as a rugged, self-priming unit built for continuous-duty freshwater and saltwater use.

This heavy-duty 12V pump is engineered to supply steady water flow for demanding mobile and stationary systems — from marine washdowns and RV plumbing to agricultural transfer and remote water stations. With integrated bypass and an automatic pressure switch, the unit keeps pressure stable under variable demand while reducing on/off cycling. Its materials and design prioritize corrosion resistance, long life, and easy installation with standard 1/2" NPT ports.

How much water and pressure can this pump deliver?

The 53-Series provides a peak open flow of 7.0 GPM (26.5 LPM) and stops at a shut-off pressure of 60 PSI (4.2 bar), making it suitable for multiple fixtures or high-flow tasks. The performance supports systems with several outlets while maintaining usable pressure under load.

• Open flow: 7.0 GPM (26.5 LPM)
• Shut-off pressure: 60 PSI (4.2 bar)
• Suction lift: self-primes up to 6 ft (1.8 m)
• 1/2" NPT ports for standard plumbing connections

Will it handle continuous or heavy-duty applications?

Yes — the 53-Series is rated for continuous operation and designed for frequent, extended cycles. Its diaphragm and valve materials are selected to resist wear, allowing reliable service in intensive environments like farms, boats, or off-grid systems.

• Continuous-duty rated for extended runtime
• Santoprene diaphragm and EPDM valves for durability
• Bypass reduces short-cycling and mechanical stress
• 4-year limited warranty for long-term protection

How does the pump manage on-demand operation and protect itself?

The integrated pressure switch activates the pump automatically when flow is requested and stops it when demand ends, delivering hands-free operation. An internal bypass smooths pressure transitions and minimizes cycling; the unit is also run-dry safe, adding flexibility where the water source may be intermittent.

• Automatic pressure switch for on/off control
• Integrated bypass to maintain steady pressure
• Run-dry safe design for added protection
• Self-priming up to 6 ft for simple setup

Is this pump suitable for saltwater and what are the installation details?

The construction uses Santoprene and EPDM components to resist corrosion in both fresh and saltwater environments, making it appropriate for marine and coastal use. Installation is straightforward with 1/2" NPT pipe thread ports and 12V electrical requirements common to mobile applications.

• Materials compatible with fresh and saltwater
• Ports: 1/2" NPT pipe thread for secure connections
• Maximum recommended fluid temperature: 140°F (60°C)
• Operates on 12V DC systems, suitable for RVs and boats

Who this is for: technicians, boat owners, RV enthusiasts, and small-farm operators who need a dependable 12V pump that balances high flow, solid pressure control, and durability. Choose the SEAFLO 53-Series when you require continuous-duty performance, easy integration into standard plumbing, and corrosion-resistant materials backed by a 4-year limited warranty.