45V06 - 45V06 Water Hose Coupling 3/16 ID x 5/8-18 LH

Technical Overview of the ESAB 45V06 Hose Coupling

The ESAB 45V06 is a precision-machined brass hose coupling designed specifically for the fluid dynamics requirements of water-cooled TIG welding systems. This component serves as the critical interface between the flexible coolant lines and the power source or water cooler unit. It is engineered to accommodate a 3/16-inch Inner Diameter (I.D.) hose, providing a secure barbed connection that resists detachment under standard operating pressures.

The coupling features a 5/8"-18 Left Hand (LH) thread, a standard safety configuration in the welding industry to differentiate water and fuel gas lines from inert gas lines (which typically use Right Hand threads). This mechanical keying prevents the accidental connection of water lines to shielding gas regulators, thereby protecting equipment and weld quality. The brass construction offers excellent thermal conductivity and corrosion resistance, essential for components constantly exposed to coolant fluids which may contain additives or contaminants.

Installation involves inserting the barbed stem into the 3/16" hose and securing it, typically with a crimp ferrule or hose clamp (not included), while the nut threads onto the standard water outlet. This part is compatible with a wide range of TIG torches, including 18 and 20 series models that utilize external water return or supply lines. It is a direct replacement for standard industry part number 45V06.