1/2 Replacement Nipple

The 1/2 Replacement Nipple by Moroso is a precision-engineered pipe fitting designed for crankcase evacuation systems and custom engine plumbing applications. This 1/2 inch NPT threaded component serves as a critical connection point in performance and racing engine builds where reliable fluid routing and pressure management are essential. Whether you're rebuilding a breather system, replacing a worn fitting, or upgrading an existing crankcase evacuation setup, this replacement nipple provides the durability and precision fit that serious engine builders and mechanics demand.

Constructed from steel and finished in natural (bare) steel, the 1/2 Replacement Nipple features a weld-on design that allows for permanent, secure installation on custom fabricated manifolds, tanks, or crankcase housings. The 1/2 inch NPT (National Pipe Thread) connection ensures compatibility with standard industrial and automotive hose fittings, while the weld-on configuration provides superior strength and vibration resistance compared to threaded-only solutions. This engineering approach prevents leaks and disconnections in high-vibration engine environments where conventional fittings may loosen over time.

Motorsports enthusiasts, engine builders, and fabricators benefit most from this Moroso component when constructing or maintaining Moroso-style crankcase evacuation systems on street performance, race, and off-road engines. Installation requires welding the nipple base to your manifold or tank assembly, after which standard 1/2 inch NPT hose barbs or adapters can be threaded in for hose connection. Weighing only 0.22 lbs and dimensioned at 5.45 x 1 x 7.25 inches, this compact fitting integrates seamlessly into tight engine compartments while delivering the reliability professional builds require.