This Pentek EP-10 carbon block filter cartridge reduces fine sediment and chlorine taste and odor in residential and commercial drinking water. It has a nominal (85%) filtration rating of 5 microns. The filter will reduce free available chlorine (FAC) at 2 parts per million (ppm) by at least 90% in up to 6 000 gallons at a flow rate of 1 gallon per minute (gpm). This cartridge is made of bonded powdered activated carbon (PAC) filter media wrapped in a polyolefin pre-filter with polyethylene outer netting. The nitrile butadiene rubber (Buna-N) gaskets seal the cartridge against the housing (sold separately). The cartridge has an initial pressure drop of 3.4 pounds per square inch (psi) at a flow rate of 1 gallon per minute (gpm) and operates over a temperature range of 40 to 180 degrees F (4.4 to 82.2 degrees C). This carbon block filter cartridge meets National Sanitation Foundation/American National Standards Institute (NSF/ANSI) standard 42 for quality assurance and is used for purification of residential and commercial drinking water. Specifications Nominal filtration rating 5 microns Initial pressure drop at 1 gpm 3.4 psi Chlorine reduction capacity 6 000 gallons at 1 gpm Temperature range 40 to 180 degrees F (4.4 to 82.2 degrees C) Maximum dimensions (H x W) 9-3/4 x 2-7/8 inches (248 x 73 mm) Materials certification NSF/ANSI standard 42 The nominal filtration rating is for a particle removal efficiency of 85%. Chlorine reduction capacity is the minimum total amount of water for which the free available chlorine (FAC) at a concentration of 2 ppm is reduced by at least 90%. H is height the vertical distance from lowest to highest point; W is width the horizontal distance from left to right; D is depth the horizontal distance from front to back. Water filters remove undesirable particles chemicals and microorganisms from water by means of a semipermeable barrier adsorption or biological processes. They are made of densely packed synthetic or natural fibers that trap suspended particles materials that block microbes or adsorb unwanted chemicals or substances that cause a chemical change such as acid neutralization. For most residential commercial and industrial applications water filters are manufactured in the form of replaceable cartridges that fit inside permanent housings. Filtration systems typically consist of a series of two or more types of filters each designed to remove different contaminants. The performance of filters is measured by the minimum particle size that is blocked the percentage of particles or microorganisms that are removed the downstream concentration of unwanted chemicals the maximum flow rate and the amount of water that can be filtered before the filter must be replaced. Water filters are used in a wide range of applications including drinking water purification swimming pools industrial processes and irrigation among others. Pentair manufactures industrial commercial and residential water filtration components and systems. The company founded in 1966 and headquartered in Minneapolis MN meets International Organization for Standardization (ISO) standards 9001 and 14001 for quality assurance.