Apeks US4 1st Stage


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INT 2-3 business days until dispatch

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The Apeks US4 first stage uses a balanced diaphragm design like the rest of the apeks range but it is not fitted with a environmental seal making the first stage smaller and lighter but suitable for warm water above 10 degrees C only.

The US4 is fitted with four low pressure ports and one high pressure port which makes it ideal for travelling divers that want the reliability and performace that Apeks regulators offer but won't be using it in cold water.


  • Unsealed system for warm water
  • No turret
  • Four low pressure ports 3/8" UNF
  • One high pressure port 7/16" UNF



If you change your mind, it doesn’t fit, or you become inflicted with buyer’s regret - that's OK!

Mike's Dive Store offer an extended returns policy of 30 days - so you can be rest assured if the suit, piece of diving equipment or gift doesn't suit then just send it back and we will either exchange it or offer a full refund less any postage costs. Too easy!

For step-by-step instructions click here


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