Hydraulic and pneumatic hose safety can be ensured by using quick-connect fittings or quick couplings that make a repeated... moreHydraulic and pneumatic hose safety can be ensured by using quick-connect fittings or quick couplings that make a repeated connection and disconnection between fluid lines and the equipment they are attached to. Quick couplings are used in both hydraulic and pneumatic applications, and are designed for easy hand operation.