This is a technical schematic drawing labeled "AS BUILT" depicting a pressure switch replacement system at Tinker Air Force Base, Oklahoma City, Oklahoma. The document shows the installation design for replacement of pressure switches in Buildings 2119 and 3202 of the N.O.C. area. The schematic illustrates a piping and instrumentation system that includes multiple components: a master test gauge (5000 PSI diameter) designed for test purposes, a union connection to a gate valve for left closing except for testing, a footer gauge connection, a handle drain cock mechanism, a solenoid gauge with drain cock and shutoff valves, a petitioner expansion chamber, a piston check valve, and floor line reference. The drawing identifies specific personnel responsible for the project, including the Principal Engineer (dated 7-3-DEC-35) and an Installation Engineer (CSS-490-C1). The document is marked with a scale notation "NONE" and includes identification numbers ABC and 16-2119-F1-3 at the bottom. This appears to be a construction or facility modification document rather than a contract solicitation.
