A closure assembly for a container of a spray system, the closure assembly comprising: a closure; and a dispensing fitment, said closure including a closure body having an upper deck, a tubular hub extending downwardly from said upper deck, and a recessed fitment seat surrounding said tubular hub, said tubular hub having a bottom wall and an entrance orifice within said bottom wall, said tubular hub further including a sleeve wall extending downwardly from said bottom wall for receiving therein a dispensing tube, said recessed fitment seat having a vent hole radially spaced from said tubular hub, said dispensing fitment including a fitment body, an arbor extending downwardly from said fitment body, a cantilevered arm extending radially outwardly from said arbor, a vent plug extending downwardly from said cantilevered arm, said vent plug being positioned for radial alignment with said vent hole, a dispensing neck extending upwardly from said fitment body, and a flow conduit extending longitudinally through said arbor, said fitment body and said dispensing neck, said arbor being slidably and rotatably received in interfitting mating relation within said tubular hub of said closure body whereby said cantilevered arm is positioned in facing engagement with said recessed fitment seat, said dispensing fitment being rotatably movable between an open venting position where said vent plug is circumferentially displaced and not engaged with said vent hole and a closed position where said vent plug is circumferentially aligned and engaged with said vent hole, said arbor including an annular locking ledge on an outside surface thereof which engages with a complementary annular groove formed on an inner surface of said tubular hub to maintain said dispensing fitment in assembled relation with said closure body. a closure; and a dispensing fitment, said closure including a closure body having an upper deck, a tubular hub extending downwardly from said upper deck, and a recessed fitment seat surrounding said tubular hub, said tubular hub having a bottom wall and an entrance orifice within said bottom wall, said tubular hub further including a sleeve wall extending downwardly from said bottom wall for receiving therein a dispensing tube, said recessed fitment seat having a vent hole radially spaced from said tubular hub, said dispensing fitment including a fitment body, an arbor extending downwardly from said fitment body, a cantilevered arm extending radially outwardly from said arbor, a vent plug extending downwardly from said cantilevered arm, said vent plug being positioned for radial alignment with said vent hole, a dispensing neck extending upwardly from said fitment body, and a flow conduit extending longitudinally through said arbor, said fitment body and said dispensing neck, said arbor being slidably and rotatably received in interfitting mating relation within said tubular hub of said closure body whereby said cantilevered arm is positioned in facing engagement with said recessed fitment seat, said dispensing fitment being rotatably movable between an open venting position where said vent plug is circumferentially displaced and not engaged with said vent hole and a closed position where said vent plug is circumferentially aligned and engaged with said vent hole, said arbor including an annular locking ledge on an outside surface thereof which engages with a complementary annular groove formed on an inner surface of said tubular hub to maintain said dispensing fitment in assembled relation with said closure body. a fitment body, an arbor extending downwardly from said fitment body, a cantilevered arm extending radially outwardly from said arbor, a vent plug extending downwardly from said cantilevered arm, said vent plug being positioned for radial alignment with said vent hole, a dispensing neck extending upwardly from said fitment body, and a flow conduit extending longitudinally through said arbor, said fitment body and said dispensing neck, said arbor being slidably and rotatably received in interfitting mating relation within said tubular hub of said closure body whereby said cantilevered arm is positioned in facing engagement with said recessed fitment seat, said dispensing fitment being rotatably movable between an open venting position where said vent plug is circumferentially displaced and not engaged with said vent hole and a closed position where said vent plug is circumferentially aligned and engaged with said vent hole, said arbor including an annular locking ledge on an outside surface thereof which engages with a complementary annular groove formed on an inner surface of said tubular hub to maintain said dispensing fitment in assembled relation with said closure body.