The valve body for the J-valve and K-valve is identical. The only difference being the blanking plug that was installed where the reserve mechanism would normally go. This was also the method used on the Trieste and Trieste II DH models.
Now, to the good news.... After more than two years of prodding, Rob agreed to have new blanking plugs produced. The quality is excellent, and I have already converted one of my Trieste regs, along with a J-valve. This is also a safety factor, as I don't need to guess if a particular J-vave has one of Herman's reproduction seats, or if the reserve mechanism is merely cosmetic. Finding yourself low on air during a dive, and pulling the reserve only to find that the tank is truly empty is not a warm and fuzzy feeling.
If you are interested, reach out to Rob, or visit his website. He also has the nylon gaskets that are needed to seal the plug.



