NEOPERL’s plastic cartridge check valves are auto-assembled and tested to provide durable drip-tight operation. The units range between 1/4” to 2” for applications up to 200° F and 260 psi. Select models come combined with a pressure-compensating flow regulator (0.5 to 4 gpm). All units are certified to ANSI/NSF 61-372 and many have ASME A112.18.3M certification.