DIR-Atlanta
Contributor
DIR divers do not distinguish between "stage" and "deco" regs. We just have "stage regs", which are interchangeable between either type of bottle and are not dedicated to any particular purpose. So from that standpoint, your argument that "it makes more sense to have a button gauge on a deco bottle" is specious, at least from the DIR standpoint. In our view, there is no such thing as a "deco reg". They are all "stage regs", and they are all configured the same way (with a standard SPG on a 6" hose).All that said, on a stage I prefer a very accurate conventional SPG on a 6" or 7" hose since the turn pressure matters and accuracy and discrimination count. ... On a deco bottle, I'd argue you don't need one at all. ... On the other hand if you feel you have to have one on a deco bottle, it makes more sense to have a button gauge.
And as Sloth pointed out, the ability to purge-check that you are breathing the right gas is very useful, particularly when you are managing multiple bottles. So from that standpoint, there is actually some value to using a larger gauge face on a [sic] deco reg (besides the obvious one of equipment interchangeability).