The DuPont WFQT270005 is the correct system that uses the following:
The DuPont QuickTwist Undersink Filtration System is a Quick Twist 2-stage drinking water filtration system that helps to optimize undersink water filter performance and life. Also known as part number WFQT270005, the Quick Twist change system is designed with an auto shut-off for easy replacement. Do not use water that is microbiologically unsafe or of unknown quality without proper disinfection before or after the system.
DuPont Drinking Water Filtration System specifications:
The DuPont Undersink Filtration System is tested and certified according to NSF/ANSI Standards 42 and 53 by WQA. This undersink filtration system contains the 300 series sediment filter and 7000 series carbon filter. The operating temperature of this DuPont Quick Twist Filtration System ranges from 40 to 100 degrees Fahrenheit (4.4 to 37.7 degrees Celsius). Actual performance of this system may vary depending on usage and water quality.