Atomic B1 2nd stage vs B2 2nd stage

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eelnoraa

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Besides cosmatic changes, what are the differences between these 2nd stages? Is service interval still 2 years/300 dives for B1?
 
There is a slight difference in the housing. The B2 has the high flow version. Everything else is cosmetic and have the same service interval.
 
Not that I have seen. I have used both and have not noticed a difference. But I have not done any rigorous ad hoc tests.
 
Same service interval and for the most part the same
 
https://www.shearwater.com/products/peregrine/

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