-16an Male Water Neck w/O-Ring - Black

The MEZIERE -16AN Male Water Neck with O-Ring in black anodized aluminum is a precision cooling system component designed for serious engine builders and performance enthusiasts who demand reliability in high-temperature applications. This fitting serves as the critical interface between your water pump outlet and radiator hose, handling pressurized coolant flow in modified engines where stock cooling passages no longer suffice.

MEZIERE's engineering focuses on the integrated O-ring seal design, which eliminates reliance on external hose clamps alone and creates a dependable mechanical barrier against coolant weeping at the junction point. The -16AN designation indicates AN16 (AN is Aeronautical Standard) port sizing, meaning this fitting accepts -16 AN hose and hard-line plumbing—the industry standard for custom cooling systems where flow capacity and pressure ratings matter. The black anodized finish resists corrosion and oxidation in corrosive engine bay environments.

The compact 1.55 x 3.75-inch profile allows fitment in tight clearance situations common to engine bay modifications. The lightweight construction of 0.35 lbs adds negligible mass while maintaining structural integrity under sustained pressure cycling. Mechanics and fabricators commonly specify this water neck for custom cooling systems, engine swaps, and high-performance builds.