Johnson Pump Thru-Hull Nut Aerator - Straight/90°

The Johnson Pump Thru-Hull Nut Aerator in Straight/90° configuration is a precision-engineered marine ventilation component designed for boats requiring reliable through-hull aeration. This aerator manages water intake and airflow in marine cooling systems, bilge circulation, and live-well applications where pressure equalization or water exchange is critical to engine performance and fish survival.

The dual-angle design—straight and 90-degree orientations—accommodates varied hull configurations and transom layouts without requiring multiple part numbers. The nut aerator assembly threads directly through the hull with minimal installation footprint. Johnson Pump's thru-hull aerators are engineered to resist corrosion from saltwater environments while maintaining consistent flow rates under normal operating conditions. The compact dimensions (2 x 1 x 2 inches) allow discreet mounting in tight spaces where traditional aerators create obstruction or aesthetic concerns.

This aerator serves weekend recreational anglers and serious offshore operators who depend on stable water circulation in closed-loop cooling systems, raw-water pickups, and livewell systems. It's particularly valuable on center-console, express cruiser, and fishing boat platforms where hull space is optimized for fuel tanks and storage rather than ventilation hardware. The nut-based design simplifies replacement and retrofit upgrades on vessels with existing thru-hull infrastructure.

Johnson Pump has established itself as a marine systems provider for OEM and aftermarket pump, impeller, and accessory applications. This thru-hull nut aerator is a direct-fit component for boats originally equipped with Johnson Pump cooling systems and a compatible upgrade path for vessels migrating from obsolete or corroded aerators to proven, modern replacements.