Installed across solenoid valve to allow for bypass of some air flow, FRIGID-X™ PANEL COOLER BY-PASS SYSTEM consists of 316L Stainless steel tee and 316L Stainless steel combination tee and flow control valve connected together with stainless bypass stainless hose. Control valve on bypass sets desired flow level for particular control panel. This ensures constant purge is maintained and level of purging air can be set to optimum level depending on control panel size.