Stronger Spring for Apeks DS4


In stock

SKU: TMI003 Categories: ,

This spring is stronger than the stock DS4 spring to allow first stage intermediate pressures from 14 bar (200 psi) to 20 bar (290 psi).  This allows divers to run a higher intermediate pressure for increased max depth on an mCCR.

Note: always subtract 2 ATMs from max depth calculations.

Example: (210 psi / (14.7 psi/ATM) – 2 ATM) x (33 fsw/ATM) = 405 fsw


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FATHOM Dive Systems, LLC

4113 NW 6th St, Suite A
Gainesville, FL 32609

+1 352-213-8486
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