Questions and Answers for ScubaPro MK25 / G260 Regulator System:
Harland:
I am considering purchasing a new regulator. looking at scubapro MK25/G260, and Aqualung legend LX, and possibly an Atomic ST1 or Z2X. These are all balanced. I believe one is a piston design and the other a diaphram. What is the major difference in performance and reliability? Also which would be a preferred design to go with.
Bill (Certified Scuba Instructor at Scuba.com)
:
All of these choices are top of the line. Very hard to choose between them. You will not be disappointed with any one of them.
Aimed at technical divers, this system can face any dive situation with rock-solid performances and outstanding reliability. The G260 is a new balanced adjustable second stage featuring metal components for excellent cold water resistance (inlet tube, orifice, inhalation control knob and hose connector). It's high performance makes it a choice for all demanding divers and it will be the natural choice for G250 fans. The new left-right hose attachment option makes it ideally suited for tech diving configurations.
Technical Information MK25 First Stage Air balanced flow-through piston Chrome plated brass body Cold water: Anti-Freeze protection Externally adjustable intermediate pressure Low pressure ports: 5 on swivel turret High pressure ports: 2 Tank connection: INT 230 bar / DIN 300 bar Weight: : INT 230 825g / 29.1 - DIN 300 592g / 20.9oz Air Flow at 200bar: >8500 l/min - 301 SCFM Intermediate pressure: 9-9.8 bar / 130-142 psi
G260 Second Stage Air balanced valve Diver-adjustable inhalation effort Diver-adjustable Venturi-Initiated Vacuum Assist (VIVA) Super-flow hose High comfort orthodontic mouthpiece Full metal valve housing Weight: 275g / 9.7oz Air flow at 200 bar: 1800 l/min - 66 SCFM Maximum low pressure: 14 bar / 203 psi
FULL MANUFACTURER’S WARRANTY 
