Our 3M™ Drop-In Style Single Prefilter Housing Featuring Pressure Relief Valve & Transparent Sump, Model CFS12T is designed for use with 19-1/2" cartridges and features a non-valved head design. Compatible cartridges and pressure gauges are sold separately. This housing accommodates our line of particulate and chlorine taste and odor reduction cartridges. The housing with cartridge can be used to help protect equipment at point-of-entry.Creative Filtration Technology3M™ Water Filtration Products systems and cartridges offer a wide range of solutions designed to address many types of water quality concerns. Third-party certifications, such as NSF and WQA, are an advantage provided on many 3M Water Filtration Products. 3M Purification is a known leader in filtration technology recognized for innovation, trust, and quality around the world.Recipe Quality Water™Having cleaner and clearer water for your business is both a pleasure and a reassurance that you're giving your customers recipe quality water. With a water filtration system from 3M Purification, you can provide filtered water that may help protect your equipment and your profits. From commercial point-of-entry to dedicated point-of-use water filtration systems, look to 3M Purification to help you find the right solution.A History of InnovationFor more than a century, 3M has applied innovation and technology to improve our customers' lives and support their business goals. From our headquarters in St. Paul, Minnesota, we serve industrial and commercial customers and consumers in nearly 200 countries. Across thousands of products, the 3M brand represents consistency, superior quality, and value. Our success begins with a culture of creative collaboration that inspires a never ending stream of powerful technologies and product solutions that make life better. We have an ability to apply our technologies - often in combination - to an endless array of real-world customer needs. Of course, all of this is made possible by the people of 3M and our singular commitment to make life easier and better for people around the world. Toward that end, 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, foodservice, science labs, industrial, marine and other applications.