Poseidon Xstream Deep Mk3 Regulator 0100-000 033284

Mfg Part #: 0100-000
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  • For cylinders fitted with a DIN valve only (for cylinders fitted with a standard yoke valve order adapter above)
  • Regulator of choice for demanding divers using air or trimix
  • 2nd stage is lightweight and engineered to be utilized at the divers left or right side
  • Maximum of 21% oxygen
  • Built in Anti-Freeze Protection 
  • Side exhaust for less bubble interference 
  • Features: 2 high pressure and 5 low pressure ports

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Questions and Answers for Poseidon Xstream Deep Mk3 Regulator:

  • Onn:

    this item includes first and 2nd stage right?

    Bob  (Certified Scuba Instructor at Scuba.com):


  • Mr.:

    Hi fellow divers, Having used poseidon regulators (Cyklon & Jetstream) for almost two decades without a single problem do think Xstream would so much better than previously mentioned ones that it would be worth purchasing? Is there need to do so called users settings for the first/second stage? I so are You guys able to do it for me or is it on my own responsibility? How long the delivery (Poseidon Xstream + Octo set) would take to Hong Kong? Thanks a lot and looking forward to hear from you. Best regards, Jukka Jaatinen (A Finn living in Hong Kong)

    Bob  (Certified Scuba Instructor at Scuba.com):

    Being the newest and re-eingineered design does not always equate into the item being the "best". In this case Poseidon has simplified and streamlined much of their existing technology to create one of the best performing regulators they have ever designed. There should be no settings the user would need to make. For more details on availability and delivery please contact our inscructors at info@scuba.com or 800-34SCUBA

  • Jerome:

    With your opinion about poseidon. Xstream deep regulator and it warrant and parts program?.

    Bob  (Certified Scuba Instructor at Scuba.com):

    Poseidon makes very high quality equipment for divers and has a very good warranty.


The Jetstream Mk3 is an updated version of the classic Jetstream
The Jetstream Mk3 is an updated version of the classic Jetstream regulator. We have now connected a Jetstream second stage with an Xstream first stage, thus creating a high performing regulator.

Colours: Blue, Red, Black, Brown, Grey, Yellow


Durable PVC housing with metal mechanism and rubber parts

Technical features:

Use either way up, Robust, durable, Approved for cold water diving, Reliable high performance

2nd Stage

The number of feature has greatly improved safety and ease of use:

If debris has degraded the function of the exhalation check valve, it can easily be reached and corrected by just twisting off the diffuser. It is the only part which neeeds to be disassembled, and if it gets lost during the operation, the regulator will continue to function but must only be used for immediate ascent.

In case of a malfunction in the 1st stage causing excessive intermediate pressure, the safety valve integrated in the 1st stage will bleed off the excessive gas. This system both indicates to you that something is wrong so that you can take action, and because of the up stream servo valve technique, allows the regulator to continue to breath normally. Conventional downsteam regulators are likely to free-flow in such a situation.

Integrated surgical hose fixing points safely secures the regulatorto the diver, but in an emergency allows a distressed buddy to retrieve the regulator without undue stress to the diver. The dead air space is low at just 49.5 mi making CO2 figures minimal. Inhalation resistance is incredibly low and unaffected by depth and breathing pattern. Because of the unique Poseidon valve technology, there is no need for external adjustments. XStream is fitted with the new ergonomic mouthpiece Poseidon AIR, with asymmetrical lugs for the most comfortable bite. 

All diaphragms are protected so that a strong current or using a scooter or tug does not affect either inhalation or exhalation. A minimal number of moving parts, coupled with thermodynamic engineeering, ensures the safe use in an extremely cold environment.

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