Questions and Answers for ScubaPro MK17 / A700 Regulator System:
For many years I dove with a "piston-style" regulator, which was great for several reasons, including the fact that it breathed the same in any position. As a result, I mounted it at an offset angle, and it worked just fine.
However, I recently purchased this ScubaPro MK17 / A700 Regulator combination from Scuba.com. Love it. But I am wondering - as a "diaphram-based" regulator, can I mount the first stage with the main lobe (where the "fins" and black cap are located) in the "down" position, or does a diaphram regulator need to be mounted on the tank with the "lobe" positioned in the "up" position to obtain maximum performance.
I just used this unit in Palau, and loved it. However, I did bang the back of my head against the lobe when craning my neck to see mantas playing in the water above us. I am thinking if I mount it "lobe down," I may be able to minimize this problem.
Any comments from you guys out there (and thanks in advance for any feedback!)
Bob (Certified Scuba Instructor at Scuba.com)
As far as the average diver/user is concerned there is no difference in the operation between a piston and diaphragm 1st stage. They both do the same thing in the same way for you.