The Culligan 201 water filters contain a three-step activated carbon and lead reduction mineral, The Culligan System 201 filter effectively reduces lead levels in your drinking water, The Culligan 201 water filter system also reduces chlorine taste and odor, and particles as small as 5 microns which can cloud water, Operating pressure range: 5-120 psig (0, 4 - 8, 4 kg/cm²), Maximum influent lead: 165 ppb (parts per billion mg/l), Minimum operating temperature: 33F, (1C), Maximum operating temperature: 100F, (38C), Nominal flow rate: 1/2 Gallon per minute, (1, 9 Liters/minute), The Culligan 201 water filters are easy to install in Culligan System 201 under sink water filter systems, Change the filter cartridge at least every 1000 Gallons or 1 year: whichever occurs first, or whenever you detect a change in taste, odor, or decrease in water flow, This system requires regular replacement of the filter cartridge to maintain proper operation, Varying chlorine, sediment, or organic substance level may affect replacement frequency, SKU: CWD1948