SEAFLO 55 Series 115V Diaphragm Pump – 5.0 GPM, 60 PSI, 4-Year Warranty (RV, Marine & Off-Grid)

Overview

The SEAFLO 55 Series 115V AC automatic demand diaphragm pump is built for reliable freshwater delivery in demanding environments. Its 5-chamber design delivers robust flow with controlled cycling, making it well-suited for larger RVs, boats, and off-grid water systems where space and performance matter. A compact form, protective housing, and corrosion-resistant materials help this pump perform consistently in challenging conditions.

Designed to be installed where space is tight, the unit combines a powerful open-flow of 5.0 GPM with a practical shut-off pressure of 60 PSI, ensuring steady, usable pressure at multiple fixtures. When water is drawn, the smart on-demand pressure switch activates automatically, reducing energy use and extending component life. The pump is tested for potable water safety and evaluated to motor pump performance standards, supporting confident use in RV and marine potable systems.

Two clear advantages stand out in daily use: steady pressure with less cycling when faucets are partially opened and quiet, low-vibration operation that keeps cabins and cockpits comfortable. Run-dry tolerant design allows temporary dry-running without internal damage, broadening placement options relative to water storage locations. These characteristics combine to create a dependable water supply under varied conditions, from simple sink use to multi-fixture flow in a single loop.

Key specifications at a glance

• Model: SFDPA1-050-060-55 • Voltage: 115V AC • Open Flow: 5.0 GPM (18.9 LPM) • Shut-off Pressure: 60 PSI • Max Draw: 2.56A
• Self-Priming: 6 ft (1.8 m) • Ports: 1/2"-14 MNPT • Max Temp: 140°F (60°C) • Weight: 6.08 lbs • Warranty: 4 Years
• Five-chamber diaphragm for high-flow distribution across fixtures with reduced cycling
• Integrated bypass helps stabilize outlet pressure for smoother flow

Real-world benefits and use cases

• Supports multiple fixtures: sinks, showers, toilets, and spray guns can operate without noticeable pressure drops
• Quiet operation and reduced vibration help keep living spaces comfortable
• Durable construction resists saltwater exposure for marine applications
• Self-priming and run-dry tolerance offer flexible installation in various layouts

Where it shines

This pump is ideal for RVs, boats, and off-grid systems that demand reliable, self-contained water pressure. Its smart on-demand switch helps conserve energy and extend pump life while maintaining a steady flow for daily activities. The 4-year warranty provides additional peace of mind for long trips and challenging environments.

Installation and care tips

• Place the unit above storage tanks when possible to optimize priming
• Ensure hose ports are 1/2" MNPT and tight against leaks
• Keep the motor housing clean and avoid prolonged exposure to extreme heat
• Periodic inspection of electrical connections helps sustain performance