Minn. R. 4626.0563
PRESSURE MEASURING DEVICES; MECHANICAL WAREWASHING EQUIPMENT. 4-203.13
Pressure measuring devices that display the pressures in the water supply line for the fresh hot water sanitizing rinse must have increments of 1 pound per square inch (7 kilopascals) or smaller and must be accurate to plus or minus 2 pounds per square inch (plus or minus 14 kilopascals) in the range indicated on the manufacturer's data plate.