Scubapro

Scubapro MK25 EVO/S600 (DIN 300)

The same air-balanced flow-through piston as the G260, paired with the lighter, more compact S600 second stage.

Scubapro MK25 EVO/S600 (DIN 300)
3.6Comparison Score
$1099
Buy on AmazonBuy on Scuba.com
Released2015
First stagepiston
BalancedYes
Environmentally sealedNo
Cold-water ratedYes
ConnectionDIN
Max pressure300 bar
HP / LP ports2 / 5
Adjustable 2nd stageYes
Weight919g
Nitrox-ready (EAN40)Yes
Octo includedNo

"HP / LP ports" is the number of high-pressure and low-pressure ports on the first stage, which caps how many accessories (transmitter, SPG, inflator, second second-stage) you can run at once.

Pros
  • Air-balanced flow-through piston keeps breathing effort constant regardless of depth or tank pressure
  • XTIS thermal insulation gives it the same strong cold-water reputation as the G260-equipped MK25 EVO
  • S600's fiberglass-reinforced technopolymer body is noticeably lighter and more compact than the metal-framed G260
Cons
  • Not an environmentally sealed design like Scubapro's diaphragm regs, cold-water performance relies on XTIS rather than a sealed chamber
  • No octopus included in the base set, budget for a second second stage
  • Also sold in an INT/yoke version, so double-check the listing matches the DIN 300 spec here
Diver community sentiment
Mostly positive

Across multiple Scubaboard threads, divers consistently describe the MK25 EVO/S600 as a dependable "workhorse" with easy, effortless breathing that performs well even on deep dives, with several users reporting 10+ years and 450-650+ dives on the same unit without problems. Cold-water performance is generally rated as solid, though for serious ice diving several divers say they'd reach for the diaphragm-based MK17 instead. The most recurring complaint is an occasional high-pressure "squeal" after professional servicing, attributed to insufficient lubrication rather than a design flaw. Some note the cheaper MK17/S600 is functionally indistinguishable in breathing feel for typical warm-water diving.

Scubaboard: MK25/S600 user reviewsScubaboard: comparison across Scubapro second stagesScubaboard: MK17/S600 vs MK25/S600 for warm water

Summarized from public forum discussion (Scubaboard, Reddit, and similar), not a survey we ran ourselves. See the linked threads for the original conversations.

The MK25 EVO/S600 pairs Scubapro’s proven flagship piston first stage with the S600, a lighter and more compact second stage than the G260 it’s more commonly sold with. It’s a solid pick for divers who want the MK25 EVO’s cold-water durability without the bulkier metal-bodied second stage.