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Compact cylindrical 12V bilge pump with stainless-steel shaft and integrated check valve

Rule

Rule 500 GPH 12V Bilge Pump

SKU CH-MFHB-T8R1Y

Submersible 12 V bilge pump moves 500 GPH with ignition protection, stainless-steel shaft, thermal cut-out and built-in backflow preventer

  • 500 GPH flow rate clears water quickly
  • 12 V DC operation suits standard boat electrics
  • Submersible, ignition-protected design runs safely below waterline
  • Built-in thermal cell shuts down motor if overheating occurs
  • Stainless-steel shaft resists corrosion for longer service life

Rule 500 GPH 12V Bilge Pump — Manual Operation

This 12 V DC submersible pump delivers a flow rate of 500 gallons per hour. It is a non-automatic unit that requires a separate panel switch or float switch for activation. The design includes a hidden air vent to prevent airlocking during operation. Ignition protection makes it suitable for marine engine compartments.

Check Power Supply and Switch Compatibility

Verify that the vessel electrical system provides 12 V DC and that wiring can handle the motor current. A compatible panel switch or Rule float switch must be sourced separately because the pump has no built-in automatic sensor. Ensure the discharge hose matches the outlet barb for a secure fit. Confirm there is space to mount the unit low in the bilge.

Submersible Build With Stainless-Steel Shaft

The pump body is designed for continuous submersion and features a stainless-steel shaft for corrosion resistance. A built-in thermal cell cuts power if the motor overheats, protecting both the pump and the vessel. The included backflow preventer stops water from re-entering the bilge after discharge. True electromagnetic suppression reduces interference with onboard electronics.

How it compares

Measured against everything we stock in Boat Audio & Electronics, at today’s prices. Recalculated every night.

Price $24.99
Cheaper than about 77% of the 312 comparable items (median $69.49).

Specifications

Product
Brand nameRULE

Questions about this item

Does the Rule 500 GPH pump come with a float switch or do I need to buy one separately?

The pump is non-automatic and requires a separate panel switch or Rule float switch for operation, which are not included in the box.

What does the 500 GPH flow rate mean for my bilge?

It indicates the pump can move up to 500 gallons per hour at open flow, though actual output will be lower once plumbing, head height and a check valve are added.

Is the 12V motor protected against overheating during long runs?

Yes, a built-in thermal cell cuts power to protect the pump and vessel if the motor gets too hot.

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