05/23/2025
These are components from an Apeks Flight that was serviced by an authorized Apeks dealer (who has been doing this for long enough to know) right before the dive trip that sent it to my bench. It's diver complained of how hard it breathed, confirmed by it's 50% 1st-stage performance and subsequent 200% 2nd-stage opening effort (molasses through a straw). The cause? The previous service tech used the wrong kit(s) and installed improper components. Pictured top-left, the Flight HP valve (blue) was missing and in it's place I found the Apeks standard HP valve installed (black). You'll notice a significant difference in the shaft length, which accounted for the drop in performance. Additionally, the filter installed was the silver disc instead of the Apeks bronze disc, pictured bottom-left. The previous tech noticed that the filter provided in the standard Apeks 1st-stage kit is the bronze cone, middle, which wouldn't fit, so being an industrious albeit under-supplied fellow, he opened a kit from a different manufacturer to get one that did.
Is that all? Hell, no! The Flight 1st-stage kit also provides a replacement diaphragm clamp, pictured bottom-right with a LP port plug for scale, which, of course, the previous tech did not have so the old one was used. This component is composite and subject to possible damage during disassembly, as well as stress from use, that requires it's replacement during every service. It's counterpart in nearly every other diaphragm 1st stage regulator is metallic so that it can handle it's structural role dive after dive, service after service. It also accounts for the fact that this reg was likely not re-tuned, and that shop never checked it's outbound performance, they simply relied on the previous service's tuning or the pre-setting that assumes correct components, because if they had they would have noticed an Apeks rocking a 73 on the IP gauge.
In sum, this tech had multiple clues that he was proceeding in an unadvisable direction, and a seemingly-ok part swap could have been a contributing factor in a catastrophic situation that might have hung someone out to dry, diver or shop owner.
So, who works on your life support equipment?