First Stage Features

T2 (Titanium); B2, Z2 (Brass); M1 (Monel, Brass)

The Atomic Aquatics First Stages come in either brass or titanium.  For most, the Atomic Aquatics B2 and Z2 First Stages, constructed of chrome plated brass will fulfill a lifetime of trouble free service.  The Atomic Aquatics T2 First Stage makes for the ultimate lightweight travel regulator.  Whatever your choice, all share these impressive features:

• Compact Size


• Large, balanced, flow-through piston design for stable intermediate pressures and high performance at low tank pressures.


• Exclusive high pressure piston seal system is self lubricating for low friction and low maintenance. 

• Service to 4350 psi (300 Bar) with optional DIN connection. • Optional environmental seal kit for freeze protection at low temperatures. • Enriched air compatible materials to 40% O2 (M1 80%) from the factory with no internal modifications needed. • Single piece computer machined body maintains perfect alignment of the piston and seat to eliminate creeping intermediate pressure problems. • Two high pressure ports and five-port low pressure swivel (B2, T2) or compact, 6-port cap (Z2). • Limited Lifetime Warranty and made in the U.S.A. (all first and second stage models).