The industrial/municipal division of Pentair Water Treatment, of Chardon, Ohio, has added a pre-piped rack assembly to its CodeLine product mix. Used in large-scale water treatment systems for both brackish and salt water, the pre-assembled racks, vessels and piping arrive in one easy-to-install unit, guaranteeing proper fit-up. The rack assembly holds 12 housings. Rated at anywhere from 150 to 1,200 psi, the pre-piped units are configured for port to port, or header assembly.