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Apeks US1 First Stage

The Apeks US1 First Stage is a compact unsealed diaphragm first stage designed for use in warm water and is intended as the first stage for a redundant gas system that only requires a second stage and pressure gauge.

The US1 has just one low pressure port and one high pressure port which significantly reduces the size of the first stage.


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


Valve type
INT 2-3 days
DIN 2-3 days
More Info on Shipping

Collections: All, Apeks Dive Equipment, Regulators

Category: Apeks Regulators

Type: Regulators

Vendor: Apeks