Johnson Pump 1600 GPH Ultima Combo Automatic Bilge Pump (01674-001)

The Johnson Pump 1600GPH Ultima Combo Bilge Pump - 12V - 01674-001 is a high-performance, automatic bilge system that merges the rugged durability of the 1600 GPH Heavy Duty pump with the advanced technology of the Ultima solid-state switch. This "Combo" unit is specifically designed for boaters who require a high-capacity pump that operates automatically without the risks associated with traditional mechanical float switches.

Smart, Solid-State Automation

The integrated Ultima Switch uses patented Mirus field-effect detector cells to sense water levels. Because there are no moving parts, the switch cannot be jammed by bilge debris, seaweed, or fish scales. The electronic sensors are designed to detect water only; they are not triggered by a film of engine oil or fuel, helping you stay compliant with environmental discharge regulations.

Key Features:

• High-Volume 1600 GPH Flow: Capable of moving 100 Liters per minute, providing a significant safety margin for medium-to-large pleasure craft and workboats.

• Maintenance-Free Switching: The solid-state Ultima switch is completely sealed against moisture and corrosion, offering superior reliability over mechanical floats.

• Heavy-Duty Motor: Features a 12-pole motor with double ball bearings and a liquid-cooled design to ensure a long service life under heavy use.

• Mechanical Shaft Seal: Utilizes a professional-grade mechanical seal that eliminates shaft wear and provides a much better moisture barrier than standard lip seals.

• Removable Strainer Base: The snap-on base allows for quick inspection and cleaning of the impeller without the use of tools or disconnecting your plumbing.

• Standard 1-1/8" Discharge: Fits most standard medium-to-large bilge plumbing systems for easy installation or retrofitting.

• Ignition Protected: Fully compliant with USCG and ISO 8846 standards for installation in gasoline engine compartments.

Technical Specifications:

• Model Number: 01674-001

• Flow Rate (0ft Head): 1600 GPH (6056 LPH)

• Voltage: 12V DC

• Amperage: 7.0 Amps

• Fuse Size: 10 Amps

• Discharge Size: 1-1/8" (28.5mm)

• Max Head: 15 feet (4.5 meters)

• Weight: 3.2 lbs

Why Choose the 1600 GPH Ultima Combo?

The Johnson Pump 1600GPH Ultima Combo Bilge Pump - 12V - 01674-001 is the perfect "set-and-forget" solution for offshore anglers and cruisers. It bridges the gap between smaller consumer pumps and massive commercial units, offering the durability of a mechanical-seal motor with the intelligence of electronic sensing. It is widely considered one of the most reliable automatic pumps in its class due to the lack of moving switch parts.

Installation Pro-Tip:

For a true "Auto/Off/Manual" setup, wire this pump to a 3-way switch panel. This allows you to leave the pump in "Auto" mode for 24/7 protection while still giving you the ability to manually override the sensor to pump the bilge completely dry or test the pump's operation during your pre-departure check.