#20 AN W/P Fitting - Blue

The #20 AN W/P Fitting - Blue from MEZIERE is a precision aluminum water pump adapter designed for straight-flow cooling system integration on 100 Series water pumps. This fitting converts a 1-inch NPT male inlet to a 20 AN male outlet, offering a direct solution for high-performance cooling plumbing where space and flow efficiency are critical. The blue anodized finish provides both corrosion resistance and visual identification of the coolant circuit.

Constructed from aluminum, this fitting is lightweight yet robust enough to handle the pressures found in modern engine cooling systems. The straight design minimizes turbulence and pressure drop compared to 90-degree elbows, making it ideal for applications where maximum coolant flow velocity is required. The 1 in NPT male thread accepts standard water pump ports, while the 20 AN male outlet connects to braided steel or rubber cooling hoses fitted with compatible 20 AN fittings. At 0.33 lbs, the fitting adds negligible weight to the cooling system assembly.

This adapter is engineered for builders and enthusiasts using MEZIERE electric or mechanical water pumps in custom cooling configurations. Common applications include high-horsepower engine swaps, off-road builds, and race vehicles where factory cooling hardlines cannot be adapted. The blue anodized aluminum body resists corrosion in humid and maritime environments while remaining easy to inspect for leaks or loose connections. The NPT-to-AN conversion accommodates both metric and SAE cooling system standards, making it a versatile transition fitting for complex plumbing layouts.