ATX 40 DS4 + ATX 40 Octopus (DIN)
The performance of the DS4 first stage is the same as the TX-40 and 50 first stage (DST first stage, DIN) but has no swivel turret for the LP ports
The ATX40 2nd stage and octopus is smaller and 25% lighter than its TX predecessor. This results in less jaw fatigue and less drag. The pneumatically balanced 2nd stage is ideally suited for an over-balanced Apeks first stage. The diver has full control of the venturi by means of a lever so as to prevent accidental freeflow when the octopus is not being used. The excellent coldwater performance of this regulator is due to the highly efficient heat exchanger on the second stages.
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First Stage
- No swivel turret
- 4 medium pressure ports, 4 x 3/8" UNF
- 1 high pressure port, 1 x 7/16" UNF
- Environmentally dry sealed system
- Polished chrome finishBalanced for superior performance
Second Stages
- Pneumatically balanced system - reduces breathing effort
- Heat exchanger for cold water diving
- Integrated Venturi Control
- Micro adjuster
- Extremely efficient exhaust valve
- Compact integrated exhaust
- 25% lighter than TX models
- Comfo Bite mouthpiece - for comfort and to reduce jaw fatigue


















