The Ambient Pressure Diving Automatic Diluent Valve
With the Inspiration Classic, in the early days it was normal to manually add diluent to the loop during descent. This because rising ambient pressure compresses the gas in the breathing loop. Soon an automatic diluent (ADV) valve was available and was called ADV. Ambient Pressure Diving developed a service-friendly ADV a proven concept which remains virtually unchanged to this day.
Therebreathersite was founded by Jan Willem Bech in 1999. After a diving career of many years, he decided to start technical diving in 1999. He immediately noticed that at that time there was almost no website that contained the history of closed breathing systems. The start for the website led to a huge collection that offered about 1,300 pages of information until 2019. In 2019, a fresh start was made with the website now freely available online for everyone. Therebreathersite is a source of information for divers, researchers, technicians and students. I hope you enjoy browsing the content!