Johnson Pump First Mate HP 400 GPH 12V - Threaded Port

The Johnson Pump First Mate HP 400 GPH 12V with threaded port is a compact, submersible bilge pump purpose-built for marine vessels operating in confined spaces where traditional larger pumps cannot fit. Designed specifically for jet skis, pontoon livewells, and personal watercraft bilge systems, this pump delivers reliable water extraction in high-moisture environments where equipment failure directly impacts vessel safety and operational readiness. Law enforcement and military personnel operating small watercraft appreciate the compact footprint and dependable 12-volt performance that keeps critical water removal systems operational during extended deployments.

Operating at 400 gallons per hour, the First Mate HP delivers substantial flow capacity despite its lightweight 0.75-pound construction, making it ideal for rapid bilge clearing during high-water-ingress scenarios. The integrated 90-degree dura-port discharge connector enables flexible hose routing without additional fittings, reducing failure points common in field-improvised installations. Threaded port configuration ensures secure connections under vibration stress encountered during vessel operation or rough water conditions. The submersible design eliminates priming requirements and allows installation directly in the bilge, simplifying both initial setup and field repairs with minimal tools.

This pump performs optimally in small watercraft applications where space constraints prohibit larger pump installations—particularly relevant for tactical waterborne operations, livery management, and emergency water removal on compact vessels. The 12-volt electrical requirement ensures compatibility with standard marine and vehicle battery systems without requiring dedicated power conditioning. Installation requires only bilge access and straightforward electrical connection, allowing operators to maintain pump functionality with field-level maintenance capabilities. For operators requiring reliable, compact bilge management on high-performance or confined-space watercraft, the Johnson Pump First Mate HP 400 GPH represents proven submersible pump technology built to military and commercial marine standards.