Air Control Valve Product Type Air Control Valve For Use With Drinking Fountains Includes Inline Mesh Y-Strainer Compatible Manufacturer Part Number VRK2AV VRK3AV Compatible Grainger Part Number 33W223 Color Multicolored Connection Type NPT Pipe Size 1/2 in Standards California Health and Safety Code 116875 (AB 1953-2006) Federal Safe Drinking Water Act NSF/ANSI Standard 61