Met Pro Corp.’s Keystone Filter Division, of Fort Wayne, Ind., has the answer for those seeking an economical, lightweight, high capacity, high temperature cartridge housing. It’s the company’s Giant reinforced nylon cartridge housings, which are suitable for hot water/high pressure service. These units offer a lightweight alternative to costly metallic vessels. Both 1-1/2?? and 1″ NPT connections are included in every Giant filter head. The price allows the installation of a preferred “duplex system?? for uninterrupted flow.