Abstract: A metering valve for introducing media into a pressurized fluid including media passaging extending through a housing. A plunger is movable between a closed position in which the plunger prevents flow of media in the media passaging and an open position in which the plunger permits flow of media in the media passaging. The plunger moving a distance between the open and closed positions. A plunger adjuster sets the distance by operatively bracing the plunger to limit movement of the plunger and changes the distance to adjust an amount of media flow permitted in the media passaging by the plunger. The plunger adjuster including an actuator to be actuated to change the distance. A bearing is operatively disposed between the actuator and the plunger and permits the actuator to be actuated to change the distance when the plunger is in the open position and operatively braced by the plunger adjuster.