Koolance patented quick disconnect no-spill coupling with automatic shutoff. 3/8 NPT (tapered) thread female fitting for screwing directly into a component of the same threading. It will only fit a Koolance QDT4 male quick disconnect.

After pulling the ring on the female QDC side, the quick-disconnect fittings will separate. Liquid on both sides will be automatically obstructed with approximately 0.2ml freed.