Quick Disconnect Plastic 1/2" Hose Barb x Female with Check (Hi-Temp) - $24.99 - Quirky Homebrew Supply
Amazon.com : Plastic Garden Hose Quick Connect with Shutoff Valve Set Male and Female, 3/4” Quick Connectors with Valve for Water Hose Coupling, Quick Release Kit Hose Fittings and Adapters (5 Sets/