DIN or Yoke?

We had a diver turn up recently for a three dive day package in beautiful Port Barton Palawan with all of his own equipment with the obvious exceptions of weights and tanks and no DIN adaptor!

scuba diving dinMy partner Keith has bought several adaptors and all have gone missing, usually because the person who borrows it forgets to remove it at the end of the diving day! Most of the dive shops here in the Philippines use whats called a yoke regulator first stage. This is the manner in which the regulator attaches to the tank. A DIN regulator screws into a tank valve, and a yoke regulator fits over the top of tank a valve and clamps onto it with a tightening screw. The DIN system is regarded by many as far superior, but a diver may find it preferable to use a yoke regulator depending upon his style of diving and tanks. So here we had a diver with a DIN first stage looking at a no diving day or use our rental gear, remove the inserts from within the top of the tank to expose the DIN screw thread or find that missing DIN adaptor.

I asked the customer why he didn’t carry an adaptor and he said it was really down to weight with all the travelling and in particular flights. We are all aware that just a few extra kilos can really add to the price of that flight ticket. So if you carry your own equipment maybe you should…………………….

Quick Check: Am I Using a DIN or a Yoke Regulator?

The easiest way to determine which kind of regulator you have is to look for an o-ring in the regulator. If there is an o-ring in the part of the regulator that attaches to the tank, you have a DIN regulator. If there is no o-ring visible on the regulator, but your tank has an o-ring, then you have a yoke regulator.

What Is a Yoke Regulator?

A yoke regulator, also known as an A-Clamp regulator, has an oblong metal brace that completely encircles the tank valve when in place. The regulator first stage is located at one end of the brace, and a large screw, called the yoke screw, is located at the opposite end. To attach a yoke-style first stage to a tank, a diver fits the metal brace over the tank valve, and then tightens the yoke screw to clamp the first stage firmly in place.

What Is a DIN Regulator?

A DIN (which stands for Deutsche Industrie Norm) regulator first stage has a threaded post that screws into the inside of the tank valve. A DIN regulator’s first stage fits into one side of the tank valve, and no additional metal or braces run behind the tank valve.

Yoke and DIN Regulators Require Different Tank Valves

Yoke regulators use a more-or-less flat tank valve that has an o-ring pressed into a small grove on the flat side of the valve.

DIN regulators use a tank valve with a large, threaded opening that allows the threaded post of a DIN regulator to be screwed inside the tank valve

scuba diving with turtle PalawanSo what did we do? The customer was desperate to dive that day and really wanted to use his own gear which is understandable as he had carried it half way round the world! So we suggested that we removed his far more complicated balanced first stage and replace with our less complicated piston first stage. The maximum depth of our dives is 24 meters and minimum water temperature around 26 degrees. Job done and the customer enjoyed three hassle free days of diving. If you are carrying your own gear around the world it’s a good idea to have an appropriate adaptor(s) especially if diving in some of the more remote areas with smaller dive operators or be prepared to make a few minor modifications! Aquaholics head office in Puerto Princesa does sell DIN adaptors at 2400 php so if you love your diving and want it to be hassle free maybe drop by at our shop at the start of your diving. Palawan, offers you many stunning dive sites including Tubbataha and the ship wrecks of Coron and don’t forget to visit our dive operation situated in the middle of the beach in the Beautiful town of Port Barton where we can take you to see pristine coral reefs and even a shipwreck!

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