Apeks DS4 1st Stage DIN Dive Regulator

This compact first stage is a time-proven workhorse that has been embraced by the technical community around the world.

DS4 First Stage:
• No rotating turret.
• Unique over-balanced diaphragm design - as the diver descends, the over-balancing feature allows the medium pressure gas in the hose to increase at a rate faster than ambient. This results in superior performance at depth.
• An environmental dry system keeps water out of the main spring chamber, preventing ice buildup and keeping silt and contamination out.