Ever had a regulator that breathed perfectly in the pool but left you gasping at 80 feet? The culprit is often something most divers have never heard of: intermediate pressure. In this episode, Marcus Okafor breaks down the critical middle step in your regulator's pressure system—that 120 to 145 PSI zone between your first and second stage that determines whether you breathe easy or struggle at depth. Whether you're troubleshooting breathing problems, preparing for cold water diving, or simply want to understand what your technician is adjusting during service, this episode demystifies the engineering that keeps air flowing smoothly on every dive.

• Intermediate pressure is the reduced air pressure in the hose between your first and second stage, typically maintained at 120 to 145 PSI above ambient water pressure—and your first stage  ...