Diving regulators are a divers life support equipment and critical to every dive. For many divers this is one of their earliest purchases after the basics and dive computers. Having your own regs is more hygienic as the mouthpiece belongs to you. Safe in the knowledge it’s clean and hasn’t been by anyone else. Many divers buy their own regulators once they have logged a few dives or had bad poor quality rental kit when learning to dive. Regulators include a 1st stage, two 2nd stages (a primary and alternate) and a gauge.