SEAFLO 51 Series Heavy-Duty Water Pressure Pump – 5.5 GPM, 60 PSI, 24V DC, 1/2" MNPT Ports - NSF, UL, CSA & IAPMO CERTIFIED FOR SAFETY - Self-Priming, 5-Chamber Diaphragm, Marine RV – 4-Year Warranty

The SEAFLO 51 Series Heavy-Duty Water Pressure Pump (Model SFDP2-055-060-51) is designed to deliver high-volume performance for boats, RVs, cabins, and off-grid systems. With its 5-chamber diaphragm design, this pump provides up to 5.5 GPM (20.8 LPM) while greatly reducing cycling, even when running multiple fixtures—no accumulator tank required. This automatic demand pump includes a built-in pressure switch that activates the unit at 60 PSI when faucets or outlets are opened. Built to run dry without damage, it features self-priming up to 6 ft (1.8 m) and is constructed with EPDM valves and a Santoprene diaphragm for superior chemical and thermal resistance. Compact and easy to install with its industry-standard mounting pattern, the 51 Series is ideal for continuous-duty or intermittent high-flow applications. Perfect for marine fresh water systems, RV pressurized setups, and mobile utility tanks, this pump combines quiet operation, long service life, and SEAFLO’s 4-Year Limited Warranty.

• [ SPECIFICATIONS ]: Model: SFDP2-055-060-51 | Voltage: 24V DC | Flow Rate: 5.5 GPM (20.8 LPM) | Shut-Off Pressure: 60 PSI (4.1 BAR) | Max Draw: 8.5A | Priming Capabilities: 6 ft (1.8 m) suction lift | Ports: 1/2"-14 MNPT | Material: Santoprene (Diaphragm), EPDM (Valves) | Max Temperature: 140°F (60°C) | Mount Pattern: 2-1/4" × 3-3/16" | Warranty: 4 Year
• [4-YEAR WARRANTY]: Backed by SEAFLO’s 4-Year Limited Warranty, this pump is engineered for rugged marine, RV, and off-grid use. Designed to withstand long hours of operation and variable duty cycles without failure.
• [ 5-CHAMBER DIAPHRAGM FOR HIGH FLOW & LOW CYCLING ]: Heavy-duty diaphragm design delivers consistent flow up to 5.5 GPM while minimizing cycling. Runs up to 5 fixtures with no accumulator tank needed.
• [ SELF-PRIMING & RUNS DRY WITHOUT DAMAGE ]: Designed to self-prime up to 6 ft (1.8 m), this pump won’t fail or overheat when run dry—ideal for variable or intermittent use in off-grid or mobile systems.
• [ BUILT-IN 60 PSI PRESSURE SWITCH ]: Automatically starts and stops when a faucet or nozzle is opened or closed. Provides steady pressure output and improved water control for a home-like experience.
• [ QUIET, THERMALLY PROTECTED MOTOR ]: Engineered for silent performance, the sealed motor includes built-in thermal overload protection, extending pump life and preventing burnout under load.
• [ EASY INSTALLATION WITH UNIVERSAL PORTS ]: 1/2"-14 MNPT threaded ports fit standard fittings. Compact footprint and standard 2-1/4" × 3-3/16" mount pattern make replacement and upgrades simple.
• [ MULTI-PURPOSE APPLICATIONS ]: Perfect for RV pressurized systems, marine fresh water setups, remote cabin tanks, agriculture spray rigs, and mobile cleaning units. Built for versatility and reliability.
• [ NSF, UL, CSA & IAPMO CERTIFIED FOR SAFETY ]: Certified to rigorous standards including NSF/ANSI/CAN 61 & 372 (potable water safety), NSF 24 (RV plumbing), UL 778 (motor-operated pumps), CSA C22.2 No.108 (liquid pumps), and IAPMO TS-14 (RV-specific standard)