The B2 is Atomic Aquatics' most popular regulator. It pairs the all-titanium second stage design of the T3 with a chrome-plated brass first stage, which brings the same breathing performance and second stage comfort to a lower price.

Main features

• First stage in chrome-plated brass and 316 stainless steel, with Atomic's balanced Jet Seat high-flow piston.
• All-titanium second stage construction, the same as the T3.
• Automatic Flow Control (AFC) adjusts the venturi effect as depth changes, so there is nothing to set during the dive. A Rapid Adjustment Knob is there for special situations such as surf entries or octopus use.
• Patented polished 316 stainless steel Comfort Swivel with black PVD coating lets the second stage turn through 30° without the hose pulling, binding or kinking.
• Patented titanium Seat Saving Dynamic Orifice protects the seat in storage and helps the second stage keep its factory tuning.
• Pneumatically balanced poppet with a high-flow case and lever design, for easy breathing at all depths and tank pressures.
• Dual material second stage cover: the whole front works as the purge.
• Elliptical exhaust valve that reduces exhalation effort at depth.
• Dual silicone comfort fit mouthpiece with tear-resistant bite tabs.
• Optional colour kit (sold separately).

Technical specifications

• Weight: 2.5 pounds (yoke version)
• First stage ports: 2 HP fixed, 5 LP on a swivel cap
• Nitrox: approved for non-dedicated EAN use with mixtures up to 40%
• Materials: chrome-plated brass and 316 stainless steel first stage, titanium second stage
• Sealing: optional factory-sealed first stage, closed to silt and sand (the sealed options below)

Service and warranty

Atomic Aquatics sets the service interval for this regulator at 2 years, or sooner with heavy use (see Atomic's warranty terms for the dive limit). It carries Atomic's limited lifetime warranty for the original owner; mouthpieces, hoses, O-rings, filters and valve seats are covered for 2 years. The warranty applies to regulators bought from an authorized Atomic Aquatics dealer and registered with Atomic within 30 days of purchase.

Options on this listing

First stage connection: Yoke; DIN; Yoke, sealed; DIN, sealed. This page is the Yoke, sealed version (Atomic Aquatics part number 03-0027-6P).