Connecting a male and female coupler does not take training or effort, unlike other fluid connectors. Simply use the ergonomic push-button for a quick disconnect. Neither action will put strain on someone using these several times a day. Keyed connection options were designed for systems requiring error-proofing, as well as any sensitive application where lines can be crossed. The push-buttons and valves are color coded so it can be easily identified as a keyed or non-keyed coupler.