The Lang 80502-04 solenoid valve controls gas flow within compatible commercial griddles through an electrically operated mechanism. When its 120V coil receives power, the valve changes position to regulate the gas supply according to the equipment's control sequence. The 1/2-inch connection identifies its specified pipe size for installation. https://partsfe.com/80502-04-lang-solenoid-valve-12-120v/1-80502-04.html