1-1/2in to 1-3/4in Inch Hose Barb Splice Coupler

The 1-1/2in to 1-3/4in Inch Hose Barb Splice Coupler is an essential fluid transfer component designed for automotive cooling systems and custom cooling loops. This stepped barb adapter serves as a bridge between two different hose sizes, eliminating the need for multiple hose assemblies and reducing connection points that can leak under pressure. Whether you're upgrading a radiator setup or installing a custom water-cooling system, this coupler provides a reliable solution for connecting mismatched hose diameters.

Constructed from durable aluminum, this splice coupler features dual barbed ends—one sized for 1-1/2-inch hose and the other for 1-3/4-inch hose—allowing you to transition fluid flow between incompatible hose dimensions. The barbed design creates a mechanical lock with hose material, preventing slippage even under sustained vibration and pressure cycles common to engine bay environments. Each barb is precisely machined to optimize hose grip without puncturing or damaging the hose wall.

This hose barb splice coupler is ideal for automotive enthusiasts looking to enhance their vehicle's performance. Its compact footprint allows installation in tight underhood spaces, making it a versatile choice for various applications. Weighing only 0.14 lbs, the aluminum construction resists corrosion while keeping overall system weight minimal—a critical consideration in performance and racing applications.