This how-to video goes through the detailed instructions on the procedure and the tools needed to change your Elkhart Brass Chief nozzle stem. Changing the stem allows you to change the gallonage that your nozzle flows. Call Elkhart Brass customer service to discuss the correct stem for your specific model or for questions on this video. Our main number is 800-346-0250 (domestic US) or 1-574-295-8330 (US and international).