NEOPERL offers a line of compact flow regulators (OD sizes 1/4" to 15/16") that are easy to insert (press-fit) and available in flow rates from 0.1 gpm to 30 gpm. They provide a reliable flow rate control from 15 to 150 psi, are noiseless and trouble-free for several years, the company says. The flow regulators are certified to ANSI/NSF 61-372.