in relation to additive passageway fnac again element mt rotates with rnb by virtue of a keyway and slot mechanism between them element mt translates with respect to nozzle elements by virtue of movement of a lug or pin of element mt in a helical or spiral slot of element ft fig1 illustrates a mixing chamber plate mtmp typically affixed to the downstream end of element mt providing the bafflehead fig1 and 15 provide two cross section views of the nozzle of the embodiment of fig1 by virtue of fig1 and 15 the assembly of the above referenced parts into the nozzle is illustrated and the flow of fire fighting fluid blue and additive orange is indicated in fig1 fitting hft is a fitting provided for attachment between a hose or line and nozzle element fnb element fts attaches to fixed element fnb element fts provides a seal to separate a high pressure zone from a low pressure zone within the nozzle element fts helps permit element mt of the nozzle to translate and rotate within it fig1 illustrates additive chamber fnac defined in element fnb with tubular element ft shown as providing an additive port ftap port ftap and whichever additive port mtap of element mt that is rotated within and aligned.