Embodiments of the present invention allow an operator to select one, two, or more tires in the system to have their individual pressure measured or equalized and set by either connecting it to a compressed air supply or by bleeding out excess air to reduce tire pressure. This is all done by operating the push-button valves on the gauge handle to read and/or bleed when the push-button valve for reading is not actuated; it isolates the gauge from the compressor's air pressure during a filling phase to prevent its being damaged.