Section 408.4292. Pressure or altitude gauges.

Each hot water boiler shall have a pressure or  altitude   gauge connected to it or to its flow connection in such a manner that it cannot be shut off from the boiler except by a cock with tee or level handle, placed on the pipe near the  gauge.  The handle  of  the  cock   shall   be parallel to the pipe in which it is located when the  cock is open.  The scale on the dial of the pressure or altitude gauge shall  be  graduated   to not less than 1 1/2 times the  maximum  allowable  working   pressure.  The gauge shall be provided with effective stops for the indicating pointer at the zero point and at the maximum pressure point. Pressure  or altitude-gauge connections shall be of nonferrous composition when smaller than 1-inch pipe size and longer than 5 feet between the gauge and point of connection of pipe to boiler, and also when smaller than 1/2-inch pipe size and shorter than 5 feet between the gauge and point of connection of pipe to boiler.

History: 1979 AC.