... base into cutout detail no nozzle nut. 4.Hold needle in cutout and screw nozzle nut until ... on bottle with a sterile needle . 2.Using hand hold bottle. 3.Looking through bottle mount window ,make ... can be heard.TO REPLACE BETTLE 1.In one hand using thumb and foreinger ,squeeze retention grips firmly ... together. 2.With the other hand grasp base of the blttle and pull firmly out ...