Barb Tubing Coupling ValveUse this Barb Tubing Coupling Valve to connect two sections of tubing with shut-off valve. Valves are great to control, disperse, slow and/or divert water in all low pressure drip irrigation systems.Features: Simple on-off operation and straight through flowGreen cap for standard irrigation applicationsPurple cap is used for reclaimed/recycled waterBlack cap for general purposeUV stabilized materials for long lifeApplications: Secondary zone water diversion and flow controlGravity irrigation flow valve Any situation where fluid restriction is needed Fitting Size Acceptable Tubing IDFitting Use Max Operating Pressure 1/4" .170"Secondary zone water diversion and flow control, can be used as a dripper in gravity systems Up to 30 PSI 1/2" .570" to .620"Secondary zone water diversion and flow control. Up to 50 PSI 3/4" .805" to .820"Secondary zone water diversion and flow control. Up to 50 PSI ID is inside diameter