On a spring evening in 1956, company president and founder Dick Meissner sat down in his garage to begin work on his first sewing contract. Phil Anthony of Anthony Pools had just given him his first order to produce the Anthony McIntosh filter bag. Working alone and at night, Dick laid the foundation for the company that has grown to become the largest manufacturer of swimming pool and spa filter elements in the world. By staying focused and specializing in filtration, Unicel has developed expertise in a very critical area of the pool and spa industry. Today, Unicel is the nation's leading manufacturer of swimming pool filter replacement cartridges. Finding the exact filter cartridge you need is easy.