Warhammer
Guest
detroit diver.....From what I was told, and I verified it from a few other sources, was that the counterbalance cylinder on Apeks regs shipped to distributors in the US were different from those sold in the UK. This US version cylinder improves breathing at greater depths by reducing the tension on the shuttle valve spring. The reason it wasn't installed on UK models had something to do with the European CE standards, as I recall, it caused the reg to be more proned to freeze-ups in extremely cold water, but don't quote me on that part. At first, this change was implemented in shop by US dealers on their stock. Apeks started shipping the US regs with the new cylinder last fall sometime I believe. So chances are yours bought in March already had it.
I was also told that the Apeks had changed some other parts like shuttle valve, shuttle valve spring, high pressure spring, and O-rings since severing ties with Zeagle.
I was also told that the Apeks had changed some other parts like shuttle valve, shuttle valve spring, high pressure spring, and O-rings since severing ties with Zeagle.