This specification provides the minimum requirements for the design, fabrication, pressure rating, marking, and testing for fuel oil meters (volumetric positive displacement type). The components of the meter shall be the following: housing, measuring chamber, adjusting device, direction marker, and register. Meter properties such as capacity, pressure drop, normal flow error, and maintainability shall be determined. Meters shall have all burrs or sharp edges removed and shall be cleaned of all loose metal chips and other foreign substances. A representative fuel oil meter shall undergo calibration and adjustment and hydrostatic test.