The first stage of a diving regulator is the component that attaches directly to the scuba tank, responsible for reducing the high pressure of the compressed air in the tank to a more manageable intermediate pressure. It is typically made of durable materials like brass and chrome to withstand the harsh underwater environment and the high pressure of tank air. This critical component features multiple ports to connect to the second stage regulator, the submersible pressure gauge (SPG), and other accessories, ensuring a steady and reliable air supply to the diver at varying depths.
