Apeks DS4 is an ultra-balanced first stage regulator with a dry silicone chamber for cold water.

In the first stage of the Apeks DS4, a unique membrane design is applied, due to which the intermediate pressure supplied by the second stage increases more than in traditionally balanced regulators, i.e. goes with a certain lead, so the DS4 will provide ease of breathing at any depth, which is especially appreciated in complex deep-sea diving.

4 low pressure ports 3/8 UNF.

1 high-pressure port 7/16 UNF

Maximum operating pressure 300 bar