Quick-disconnect fittings (often abbreviated as QDCs or QDs) provide fast and easy connection and disconnection of fluid lines. There are a myriad of quick-disconnect fitting types for low-pressure liquids, high-pressure hydraulics, air, and other gases – and even vacuum – and they are found in virtu­ally every industry that must handle fluids.

Quick-disconnect fittings simplify and speed fluid line assembly while preventing leaks and spills. In this guide, we’ll review the different types and design considerations.