-20an Swivel Water Neck

The Peterson Fluid -20AN Swivel Water Neck is a 90-degree aluminum water outlet adapter engineered for high-performance cooling systems in Chevy V8 engines. This black anodized fitting combines directional flexibility with corrosion resistance, making it essential for custom cooling line routing in street machines, race cars, and engine swaps where standard water neck configurations won't fit.

The swivel design allows 360-degree hose orientation without repositioning the neck itself—a critical advantage when packaging tight engine bays or integrating aftermarket radiators and heater cores. The -20AN (AN20) male connection accepts standard braided stainless steel hose with AN20 female fittings, ensuring leak-free integrity under pressure. Aluminum construction keeps weight minimal while the black anodized finish provides corrosion protection against coolant chemistry and moisture exposure. The compact envelope (5.05" x 3.4" x 5.25") fits within typical engine compartment constraints without requiring structural modifications.

This fitting serves engine builders, hot rodders, and restoration specialists who need precise cooling line control. Whether upgrading to a modern electric fan setup, installing a remote thermostat housing, or fabricating a custom coolant loop, the swivel water neck eliminates common plumbing conflicts. Peterson Fluid is recognized in racing and performance circles for precision coolant system components that perform reliably at sustained high temperatures.

Verify your specific engine's water outlet port configuration and hose size before ordering. AN20 fittings are not interchangeable with other sizing standards, and the 90-degree angle assumes your line routing path. Pair with quality braided hose, proper hose clamps, and thread sealant for permanent installation.