Rule Mate 800 GPH Automatic Bilge Pump – 12V & 24V is an all-in-one electric bilge pump designed to remove accumulated water automatically from the lower bilge area of a boat or marine vessel. It combines the pump and automatic water-level sensing system in one compact unit, so a separate external float switch is not required. The pump is suitable for controlling routine bilge water caused by rain, spray, minor seepage, washdown water, and normal vessel operation. Its integrated design also reduces the number of separate components required when installing or replacing an automatic boat bilge pump.

This Rule Mate bilge pump has a nominal pumping capacity of 800 gallons per hour, equivalent to approximately 3,028 litres per hour. It is available in two voltage variants for different onboard DC electrical systems. The RM800B-12V model is designed for a 12V DC system, while the RM800B-24V model is intended for a 24V DC system. Both variants provide the same rated 800 GPH capacity and use a 3/4-inch or 19 mm discharge outlet for connection to a compatible marine bilge hose. The manufacturer’s reference information lists the pump at approximately 4.4 inches or 114 mm high and 6 inches or 152 mm wide.

Unlike a conventional non-automatic bilge pump that requires a separate mechanical float switch, the Rule Mate 800 uses an internal level-sensing system. It operates when water is detected and stops after the water has been discharged. The Rule-Mate design also includes a timer-based backup operating mode, allowing the pump to continue checking for water if oil, dirt, or debris interferes with the primary level sensor. Manufacturer information for this Rule-Mate generation also identifies a non-return valve and anti-airlock protection as part of the design. These functions help support dependable automatic operation while reducing the possibility of unnecessary continuous running.

The 12V and 24V versions should be selected according to the vessel’s existing battery bank and electrical system. The manufacturer lists a recommended 5-amp fuse for the 12V RM800B and a 4-amp fuse for the 24V RM800B-24. The listed current consumption is 3.0 amps at 12V and 1.6 amps at 24V, increasing to 3.7 amps at 13.6V and 2.0 amps at 27.2V, respectively. The removable strainer helps prevent larger debris from entering the impeller area and can be accessed when inspection or cleaning is required. Correct mounting, electrical protection, hose diameter, and discharge routing remain important for achieving suitable performance from this automatic bilge pump.

Key Features:

• Rule Mate 800 GPH Automatic Bilge Pump – 12V & 24V combines an electric boat bilge pump and automatic water-level sensor in one practical marine unit.
• Nominal pumping capacity of 800 GPH, approximately 3,028 litres per hour.
• Available as RM800B-12V for 12V DC systems and RM800B-24V for 24V DC systems.
• Integrated automatic level sensing eliminates the need for a separate external float switch.
• Timer-based backup mode continues checking for water if the main sensor is affected by oil or debris.
• 3/4-inch or 19 mm discharge outlet for compatible marine bilge hose.
• A non-return valve helps reduce water flowing back through the discharge connection.
• Anti-airlock protection supports continued water movement through the pump.
• The replaceable and removable strainer provides access for routine inspection and cleaning.
• Approximate manufacturer-listed size of 4.4 inches high by 6 inches wide.
• Recommended fuse rating of 5 amps for the 12V model and 4 amps for the 24V model.

Applications / Suitable For:

• Rule Mate 800 GPH Automatic Bilge Pump – 12V & 24V is suitable for automatically removing normal water accumulation from the bilge compartments of compatible marine vessels.
• Recreational boats require an integrated automatic bilge pumping system.
• Fishing boats, leisure craft, and small workboats with compatible bilge capacity requirements.
• New bilge-pump installations where using a separate mechanical float switch is not preferred.
• Replacement of a compatible Rule Mate bilge pump with a 3/4-inch discharge connection.
• Vessels operating with either a 12V or 24V DC onboard electrical system.
• Bilge areas where rainwater, spray, minor seepage, or routine operational water may collect.
• Marine installations requiring automatic operation with an optional manual control arrangement through a compatible panel switch.

FAQs:

Q: Does the Rule Mate 800 GPH Automatic Bilge Pump require a separate float switch?
A: No. The pump has an integrated water-level sensing system, so an additional external float switch is not required.

Q: What is the difference between the RM800B-12V and RM800B-24V variants?
A: The RM800B-12V is designed for a 12V DC electrical system, while the RM800B-24V is for a 24V DC system. Both models have an 800 GPH capacity and a 3/4-inch outlet.

Q: What discharge hose size is required?
A: Both variants use a 3/4-inch or 19 mm discharge connection. A compatible marine bilge hose and suitable fittings should be used.

Q: What happens if dirt or oil affects the automatic sensor?
A: The Rule-Mate system includes a timer-based backup mode that allows the pump to continue checking for water if the main level sensor becomes affected by oil or debris.