Quick Disconnect Coupling for Liquid Cooling Solutions The CGQ Series is the quick connector member of our liquid cooling coupling family, made for light load lines where a technician couples and releases the loop many times a day. The steel balls fasten directly into the mating groove, so a single short hand movement completes the joint - there is no sleeve to slide back first, no wrench and no torque setting. Because it runs on glycol and aqueous solution , the seal package