Pressure measuring devices that display the pressures in the water supply line for the fresh hot water sanitizing rinse shall have increments of seven (7) kilopascals (one (1) pound per square inch) or smaller and shall be accurate to within fourteen (14) kilopascals (two (2) pounds per square inch) in the range indicated on the manufacturer's data plate.
Okla. Admin. Code § 310:257-7-25