1100 GPH Automatic Bilge Pump

Rule Electronic Sensing Automatic Bilge Pumps: Intelligent, Reliable, and Built for the High Seas

The Rule 27SA is a compact, fully automatic 12V bilge pump built for boaters who want reliable bilge protection without wiring in a separate float switch. An internal sensor checks the impeller for water resistance every two and a half minutes, running only long enough to clear the bilge before shutting back down. That means less unnecessary cycling, lower battery draw, and one less mechanical float switch to foul with debris or fail. The pump is rated at a true 1100 GPH at 12 volts rather than the 13.6V some ratings are based on, so it delivers the flow you're actually paying for under real onboard battery conditions.

An optimized impeller boosts output without increasing amp draw, while a built-in thermal cutoff, backflow check valve, and hidden air vents work together to protect the motor, keep the bilge drier between cycles, and prevent airlock in tight plumbing runs. The snap-off strainer base pops free for fast debris clearing, and threaded discharge ports simplify hose hookup during installation or replacement. Ideal for small to mid-size boats, trailer boats, and any setup where panel space makes a standalone float switch impractical, the 27SA is fully submersible, ignition protected, and built from rustproof, corrosion-resistant materials for long service in salt or fresh water.

Key Features

• Electronic sensing operation: Internal sensor checks the impeller every 2-1/2 minutes and runs the pump until the bilge is clear, eliminating the need for a separate float switch
• True 1100 GPH rating: Flow capacity is rated at 12V DC, so the pump delivers its advertised output under real battery conditions
• Optimized impeller: Increases flow without increasing amperage draw for more efficient pumping
• Built-in Thermal Cut-Off (TCO): Protects the pump motor and vessel electrical system from overheating
• Backflow prevention: Integrated check valve reduces water left in the discharge line and keeps the bilge drier between cycles
• Anti-airlock design: Hidden air vents in the pump body help prevent airlocks in tight or complex plumbing installations
• Snap-off strainer base: Detaches for quick debris removal and easy cleaning
• Threaded discharge ports: Simplify installation and future maintenance
• Three-way wiring: Connects to an optional manual override switch or indicator light for added control and visibility
• Durable, submersible construction: Fully submersible, rustproof, corrosion-resistant, and ignition protected for long-term marine use

Specifications

• Flow Rate: 1100 GPH (4,164 LPH), rated at 12V DC
• Voltage: 12V DC
• Sensing Cycle: Checks for water approximately every 2-1/2 minutes
• Housing: Rustproof, corrosion-resistant, submersible, ignition protected

What's Included

• Rule 27SA bilge pump with integrated electronic water sensor
• Backflow check valve
• Snap-off strainer base