APEKS DB4 DIN 1st Stage Regulator

First Stage: - 2 high pressure ports. - Compact machined first stage based on the expedition tested Apeks DS4 platform. - Break through, innovative over-moulded first-stage endcap and environmental diaphragm helps prevent ice build-up that can cause first stage free flow in extreme circumstances. - Also protects the first stage from impact damage. - Large surface area heat exchanger diaphragm clamp helps increase the gas temperature inside the first stage, resulting in improved cold water performance. - 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 faster rate than ambient. This results in superior performance at depth.