evil_xander
Contributor
Stormbringer:James,
Scubapro makes the MK17 diaphram 1st stage...which is enviromentally sealed. Along with the S555 or G250 or even S600 you would have one of the best regulators around.
I agree, MK17/X650/S600/G250 would be my first choice if I was looking for a sealed 1st stage.
Iron William Flint