Jabsco 12V Self-Priming Marine Macerator Pump – 12 GPM (18590-2092)

Jabsco 12V Self-Priming Marine Macerator Pump – 12 GPM (18590-2092)

A heavy-duty 12V macerator pump built for holding tank discharge on recreational and commercial vessels. The Jabsco 18590-2092 delivers 12 GPM flow with a four-bladed chopper, triple-sealed motor, and run-dry protection — engineered for reliable, clog-resistant operation in demanding marine environments. The most common choice for 12V vessels needing a standalone macerator for their sanitation system.

Key Features

• 12V DC operation: Compatible with standard 12V electrical systems on the vast majority of recreational vessels.
• 12 GPM flow rate: High-volume discharge clears holding tanks quickly and efficiently.
• Four-bladed chopper: Macerates waste thoroughly to minimize clogging in the discharge line.
• Triple-sealed motor: Three-stage sealing prevents both internal and external motor corrosion — built for long-term reliability in salt water environments.
• Run-dry protection: Self-priming pump can operate safely without liquid present, protecting the motor during discharge cycles when the tank runs low.
• Self-priming to 4 ft (1.2 m): Primes automatically without manual intervention, even when mounted above the tank outlet.
• Ignition-protected: Complies with USCG 183.410 and ISO 8846 Marine ignition protection standards — safe for installation near fuel systems and in enclosed spaces.

Specifications

• Part Number: 18590-2092
• SKU: 6-185902092
• Voltage: 12V DC
• Flow Rate: 12 GPM
• Self-Priming Lift: Up to 4 ft (1.2 m) vertical
• Chopper: Four-bladed
• Motor Sealing: Triple-sealed
• Certifications: USCG 183.410, ISO 8846 Marine (ignition protection)
• Dimensions: 11⅜" L × 4¾" W × 3⅝" H
• Inlet Port: 1½" hose barb + 1½" NPT
• Discharge Port: 1" hose barb

Related Products

• Jabsco 24V Self-Priming Marine Macerator Pump – 12 GPM (18590-2094) — The 24V version of this pump for larger vessels and commercial applications with 24V electrical systems.
• Jabsco 12V Self-Priming Macerator Pump (JAB-18590-2092) — Earlier listing of the same pump model — confirm stock and pricing before recommending.
• Seachoice 12 GPM Marine Macerator Pump – 12V, 12A (17888) — Alternative 12V macerator with universal mounting bracket and easy-access unclogging knob.
• Johnson Pump 12V Macerator Pump — Another 12V macerator option for side-by-side comparison.
• Jabsco Type III MSD Waste Management System – Holding Tank & Macerator (38110-0092) — All-in-one holding tank and macerator system for vessels building a complete sanitation setup from scratch.

Parts Desk Insights

This is the standard recommendation for any 12V vessel that needs a standalone macerator pump for holding tank discharge — it’s Jabsco’s most widely used macerator model and a proven performer. The triple-sealed motor and run-dry protection are the key durability differentiators over cheaper alternatives; worth highlighting for customers who’ve had macerators fail from corrosion or dry running. The ignition-protection rating matters if the pump is going near the engine compartment or a fuel tank — confirm this before recommending a non-rated pump. Note that there is also an older listing for this same model (JAB-18590-2092) — these should be consolidated to avoid customer confusion. For customers on 24V systems, specify the 18590-2094 instead.