Johnson Pump 4000 GPH Bilge Pump 12V

Keep your bilge under control with the Johnson Pump 4000 GPH Bilge Pump 12V (189-40004). Built for demanding commercial and recreational use, this high-capacity pump is engineered for reliability with a liquid-cooled, tall stack 12-pole motor and low amp draw. It also includes a removable check valve and internally threaded duraport fittings for straightforward installation.

Key Features

• High volume 4000 GPH performance for fast bilge water removal
• Liquid cooled, tall stack 12-pole motor with double ball bearing design for extended service life
• Low amp draw design to help reduce electrical load
• Includes multiple port size internally threaded duraports: 1-1/2 and 2
• Removable check valve included
• Robust high-impact ABS plastic construction with unique threaded port design
• Made in USA
• 3-year warranty

Product Compatibility

• 12V DC marine bilge pump applications (livewell/bilge systems requiring high-capacity pumping)
• Recreational and light commercial inboard/outboard boats with 12V electrical systems
• Systems that use a removable check valve and standard marine discharge connections

Product Details

• Brand/Model: Johnson Pump 4000 GPH Bilge Pump 12V
• SKU/Part number: 189-40004
• Power: 12V
• Capacity: 4000 GPH
• Mounting/Port fittings included: 2 internally threaded duraports, 1-1/2 and 2
• Check valve: removable (included)
• Warranty: 3 year warranty
• Barcode: Omits barcode because the provided value is in scientific notation

Parts Desk Insights

Best Use Case: Ideal for boats that need high-rate, dependable bilge pumping and prefer a pump designed around durable motor cooling and a removable check valve for service access.

Common Issues: For best performance, verify your discharge plumbing matches the included port sizes (1-1/2 and 2) and use compatible marine-grade hoses/fittings. During service, check that the check valve seats cleanly and that the pumps mating surfaces remain sealed to prevent recirculation or air leaks.

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