Atomic Aquatics Regulators 

So glad to hear it! The b2s are great regulators.

Our staff loves their Atomic regulators and BCDs too. That swivel is the best.

Hey Michael, Great question. The B2 has a comfort swivel on the first and second stage. The Z3 only has a swivel on the second stage. Most of our customers and staff like the swivel in both places because it really makes moving effortless and configuring your regulator convenient. There is very little strain when moving around with the B2 because of the swivel in both places. The B2 is essentially the same regulator as the T3 but is made with a chrome-plated Brass 1st stage. While you would be happy with either regulator that is why the B2 is the top seller over the Z3. The Z3's first stage is also made of Zirconium with a Titanium swivel on the second stage. The Zirconium is a less expensive metal than the chrome-plated Brass body of the B2's first stage. That is also why the Z3 is less expensive than the B2. If you would like to see our comparison chart head over to our website: diveaai.com/en/atomic-regulators-comparison-chart - we only have the Z2 in our store (so that is why the Z3 is not on there) this is because, as you pointed out, the Z3 and B2 are so similar. Hope this helps, Happy Diving!

Hello! Yes, if your B2 is environmentally sealed you should be okay to use it in cold water.

@@DiveAAI Thanks so much!

@@Sicel1304 Any time!

All of the current models ( the T3, ST1, B2, Z3 ect) use all the same service kits.

The M1 is a great regulator for cold environments. Monel parts are used internally in the first stage for high strength, corrosion-resistance and oxygen compatibility. 316 Stainless Steel, multi-layer Zirconium-coated Brass, and Titanium are used throughout the second stage. The second stage features a thermal heat sink for cold water, and a surge protected front cover and super-dry exhaust valve for rough water. Add a super-wide exhaust deflector and an exclusive heat-protecting jam nut for freeze protection to cover almost any extreme diving situation. Most of our staff dive this regulator year round in Wisconsin lakes. We use it out on Lake Michigan in 35 degree water and under the ice with confidence. The best part is you don't have to sacrifice ease of breathing for all of these features. It still breathes easy and is a quality regulator for cold water!

I use the Atomic M1, I live in Britian and they are perfect for our British waters. The octo's are superb and are identical to the primary, with the only difference being the colour of the reg. They are superb for cave diving too. I would highly recommend 👌🏻✌🏻