The Aqua-Pure APS117 water filter is for use with many Aqua-Pure whole house water filtration systems that use 9 3/4-Inch by 2 1/2-Inch water filters. Unlike the Aqua-Pure AP117, the APS117 also removes Scale. From the Manufacturer The Aqua-Pure xAE; Whole House Replacement Filter AP117, compared to competitive carbon cartridges, delivers more chlorine reduction capacity, higher flow rates, lower pressure drops, and superior ability to handle particulate. As part of a whole-house system the cartridge is an economical, effective solution for common water-quality problems, helping improve the clarity, taste, and odor of water for drinking, laundry, bathing, and other residential uses. Manufactured by 3M Purification Inc., formerly CUNO Incorporated, the Aqua-Pure xAE; AP117 replacement filter cartridge filters at a flow rate of 3 gallons/11.4 liters per minute. Water enters the cartridge at both ends, where it is prefiltered before flowing through a bed of high-absorption carbon. The cartridge has a five-micron filtration rating, allowing it to capture the smallest size particle generally considered to be a problem. It is 9 3/4 in /24.8 cm high. It is for use with systems AP11T, AP101T, AP1610SS, SST1HA, SS4 EPE-316L, SS8 EPE-316L, and SS12 EPE-316L. Almost every home can benefit from a filtration system that filters water as it first enters the home. Called point-of-entry systems, or whole-house water filtration systems, they reduce contaminants, improve taste, and reduce odor. Reduction of particulate, rust, and other minerals helps preserve plumbing and fixtures, while more appealing drinking water may provide a cost-effective alternative to bottled drinking water. In general there are two types of whole-house water filtration systems, cartridge and water treatment, such as backwashing filters and softeners. A cartridge system is typically more compact and requires a lower initial investment, but may have higher long-term operating costs due to the replacement cartridges. Before making a choice on a system for your home, you may want to have a water filtration contractor test your water and discuss your needs. The Aqua-Pure xAE; AP117 Whole House Replacement Filter Cartridge, recommended for use in a whole-house cartridge system, removes particulate (dirt) as small as five microns in size, and helps reduce chlorine taste and odor. For more than a century, 3M has applied innovation and technology to improving our customers ' lives and supporting their business goals. Today the company, from its headquarters in St. Paul, Minnesota, serves industrial and commercial customers and consumers in nearly 200 countries. 3M Purification Inc. (formerly CUNO Incorporated), provides filtration and separation solutions for food service, science labs, residential, marine, and other applications. The 3M brand, across thousands of products, represents consistency, superior quality, and value.