Omnipure - Q5720 - 14" x 2.5" Q-Series Twist Off Carbon Block Filter - 1 MicronOmnipure Q Series Q5720 14" x 2. 5" Twist Off Carbon Block Filter 1 micron carbon block filtration with automatic shut off valve system for residential and commercial applications 1 Micron Carbon Block Twist Tap System 3500 Gallon Capacity WHY IT WORKS Solid carbon block filtration with built in convenience Twist Tap Valve System Automatically shuts off water supply when filter body disconnects from head. No manual valves, no spills, no complicated