Eileen, I will get the website for the Everpure company on Monday and post it to you. The system installs under the kitchen sink or bathroom sink, or at a point where the main waterline comes into your house. It depends on how much water you want to filter [cooking, drinking, etc.] There are several choices, from point of use filters to whole house filters. It's something you have to decide for yourself. It truly does make bad tasting water taste good and does a great purification job. Any good plumber can install the system. WE are about to put a system in the home of a local Internist who is convinced that the lime and minerals in our water are a contributing factor to arthritis in his older patients. Amy in the Ozarks.