NEOPERL check valves are preassembled and 100% tested to provide durable drip-tight operation. Available in 12 OD sizes between 3/8” and 2” for applications up to 200° F and 230 psi. Selected models (CV14FR and CV15FR) come combined with a pressure-compensating flow regulator (0.5 gpm to 4 gpm). All units certify to ANSI/NSF 61.