Another option in quick tubing connectors.

Made from stainless steel and silicone, the Blichmann Stainless Steel QuickConnector sets are durable and cool to the touch, with ribbed grips for comfy, tool-free operation. They work with all 1/2" male NPT fittings. The silicone o-ring seal is retained for perfect positioning, but is easily cleaned or replaced. They also come in multiple different sizes and configurations.