https://www.123articleonline.com/rss/author/370146/precip-filterArticles written by Precip Filter from 123ArticleOnline.comen-usCopyright (c) 123ArticleOnline.com All rights reserved. https://www.123articleonline.com/articles/1337917/the-importance-of-refrigerator-filters Inline filters are installed outside the refrigerator, usually behind the refrigerator or under the sink. These filters are connected to the water supply line that runs to the refrigerator. Inline filters are usually larger than internal filters and are designed to filter larger volumes of water. They are also more expensive than internal filters and require professional installation.