The INT ( yoke) connection uses a clamp type to mount the regulator over the cylinder valve and is tightened into place by screwing the cap. This pushes the first stage into the sealing o-ring of the cylinder valve. With the DIN fitting the male part is screwed into the valve to securely capture the o-ring. We recommend the DIN connection, since this is a safer connection. This connection is mostly used for 300bar cylinders. However, the DIN300 bar connection also works with a 200bar tank valve
A second high pressure port on a 1st stage is necesarry if you are contemplating to dive with a computer that is air integrated. The transmitter will be attached to the second high pressure port so that you will always have backup analogue SPG.
In Europe, it is mandatory to have a special M26 regset and cylinder when diving with Nitrox. The regsets that are shown here, do not have this special M26 thread. However, these are all technically fit to dive with Nitrox up to 40%. Outside of Europe, you can use these regs to dive with Nitrox up to 40%.
When you dive with an unbalanced 1st stage, breathing may become a little harder as your cylinder is being depleted of air. A balanced 1st stage will give you an even resistance during your dive, as long as your cylinder contains more than 20 Bar. An overbalanced 1st stage will give you a little more pressure when at depth, which will make breathing at greater depth easier. You will be able to feel the difference from a depth of 20 to 25 meters.
A piston 1st stage is easier to service, since there are less parts. However, a piston 1st stage needs to be serviced earlier than other 1st stages, since the water does get inside the 1st stage. A membrane 1st stage may be less maintanace- sensitive, however, you’ll have to be more precise in adjusting it. If you would like to dive in cold(er) waters, we would recommend a 1st stage with a membrane.
