Atomic ST1 First Stage


Valve Option
DIN 3-5 Business days until dispatch
INT 3-5 Business days until dispatch

To receive on , order within
0 day(s)
0 hr(s)
0 min
0 sec
Choose Next Day Delivery at checkout (in stock items)

The Atomic ST1 first stage is made from Stainless Steel rather than chrome plate marine brass as it offers better thermal characteristics than brass for improved cold water performance and provides virtually the same corrosion resistance of titanium but at a lower cost to manufacture. As an environmental benefit, Stainless Steel does not require protective chrome or nickel plating processes that can be harmful to the environment and is 100% recyclable.

The ST1 first stage uses a flow-through, high performance balanced psiton design for outstanding flow rates and consistent performance regardless of depth or cylinder pressure. It is fitted with five low pressure situated on a swivelling and two high pressure ports on the main body.

  • First stage machined from solid 316 Stainless Steel
  • Atomic Jet Seat high-flow piston first stage
  • Freeze protected factory-sealed first stage also prevents contamination such as silt and sand
  • Nitrox ready for mixtures up to 40%
  • First stage ports: 2 HP fixed / 5 LP on swivel cap


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


Need it tomorrow?

We offer next day delivery.

Not ready to commit

30 day returns.

Not enough Money?

Financing available.

Let's help our oceans

1% goes to Sea-Changers