These check valves are pre-assembled and 100 percent tested to provide durable drip tight operation. Available in 12 OD sizes between 3/8 and 2 inches, for applications up to 200F and 230 psi. The CV14FR and CV15FR come combined with a pressure compensating flow regulator, from 0.5 to 4 gpm. All units are certified to ANSI/NSF 61. NEOPERL. www.neoperl.com