SEAFLO 55 Series RV water pump system, 12V | 5.5 GPM, 2‑gal accumulator and smart pressure switch, 60 PSI

The SEAFLO 55 Series pump system is a compact 12V, 5.5 GPM self-priming water pump with a built-in 2‑gallon accumulator tank that delivers steady 60 PSI water pressure for RVs, boats and off-grid systems.

This all-in-one kit combines a five-chamber diaphragm pump, a pre-pressurized 2 gallon accumulator tank and a smart pressure switch to give quiet, low-cycle performance for potable water systems. It’s designed for installations that require reliable pressure at multiple fixtures while protecting pump life and conserving battery power. The unit meets NSF potable water standards and carries UL, CE and RoHS approvals plus a four-year limited warranty for long-term dependability.

How does this pump keep water flow smooth across multiple taps?

The integrated accumulator tank stores pressurized water so the pump doesn’t fire every time a tap opens, cutting pulsation and producing steady flow. The five-chamber diaphragm pump and smart pressure switch work together to maintain consistent output under varying demand.

• 2 gallon pre-pressurized tank reduces cycling and pulsation
• Smart pressure switch turns on at 18 PSI and shuts off at 60 PSI
• 5.5 GPM (20.8 LPM) supports several fixtures at once

Will it handle marine and RV environments safely?

Yes — the SEAFLO 55 Series is ignition-protected for marine installations and constructed with potable-water-safe materials, suitable for both freshwater and saltwater use. It passes NSF potable water testing and carries UL/CSA safety certifications for approved drinking water service.

• USCG 183.410 and ISO 8846 ignition protection
• NSF tested and UL/CSA certified for potable water
• Santoprene and EPDM components resist corrosion and scaling

How energy-efficient and durable is this pump system?

The accumulator significantly reduces on/off cycles, which lowers average amp draw and heat buildup, extending both battery runtime and pump life. The diaphragm design and quality elastomers provide wear resistance for long service intervals in RV, boat, and remote installations.

• Max draw 18.9A with lower average draw due to reduced cycling
• Self-priming up to 6 ft (1.8 m) and run‑dry capable
• Durable Santoprene/EPDM diaphragms and valves for longevity

What are the key installation and performance specs?

The unit is compact and designed for simple inline mounting with standard 1/2" NPT ports; it’s tuned for mobile and off-grid systems where space and power are limited. Self-priming capability and a smart switch reduce installation complexity while delivering reliable pressure control.

• Model SFWSK1-055-060-0021 — 12V DC operation
• 5.5 GPM flow, 60 PSI shut-off, 18 PSI turn-on
• 2 gallon tank, 1/2" NPT ports, self-priming 6 ft

Who is this for: this pump system is suited for RV owners, liveaboard boaters, tiny‑home and off-grid households, and professionals installing potable water systems that need steady pressure, quieter operation, and extended pump life. If you need certified drinking-water compatibility, reliable self-priming performance, and a compact package with a generous warranty, the SEAFLO 55 Series is built for those applications.