This is a three-position sprayer head with a swivel joint for the boom plumbing of an agricultural sprayer. It holds three individual nozzle bodies, each with its own cap, gasket, diaphragm, and O-ring, allowing the operator to select between three different flow rates or spray patterns without changing the nozzle tip. The swivel feature lets the head pivot to follow the boom’s angle, maintaining a consistent spray distance from the crop. A worn diaphragm inside the head will cause uneven pressure across the three positions, leading to streaky application. On reassembly, ensure each O-ring and gasket is seated cleanly in its groove to prevent leaks at the connection points.