The Flow Switch for 3M™ APPM Series Iron Reduction System is used to control oil-less air pumps. When water flows, it activates the flow switch, controlling the operation of the air pump. It aids in reduction of staining, odor and taste associated with iron bearing water. Excellence in Filtration Technology3M branded water filtration products have been addressing water quality issues for over 50 years. 3M products offer a wide range of solutions designed to address many types of water quality concerns. Many 3M products have the advantage of being backed by third-party certifications, such as NSF and WQA. For these reasons, 3M is a household brand name and a known leader in filtration technology. 3M is recognized for innovation, trust and quality around the world. This translates to cleaner and clearer drinking water in homes and for families. 3M Purification water filtration systems can provide excellent filtered drinking water for homes and businesses. From whole home water filtration to drinking water systems, look to 3M Purification to help find the right solution. A History of Innovation For more than a century, 3M has applied innovation and technology to improving 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. The 3M brand, across thousands of products, represents consistency, superior quality and value. Success begins with a culture of creative collaboration that inspires a never ending stream of powerful technologies and product solutions that make life better. 3M has an ability to apply technologies – often in combination – to an endless array of real-world customer needs. Of course, all of this made possible by the people of 3M, and their singular commitment to make life easier and better for people around the world. 3M is committed to providing innovative, cost-effective products that help protect people, equipment and our environment. 3M Purification Inc. (formerly CUNO Incorporated), provides filtration and separation solutions for residential, food service, science labs, industrial, marine and other applications.