How to prepare your diving tank 

Learning to prepare your diving air tank is one of the first things you have to do when you start SCUBA diving. Here is how to go about it, step by step!

How to prepare your diving tank

Before assembling your diving air tank, you should check the pressure in the tank with a pressure gauge. This will prevent you from realising that you have put your buoyancy jacket on a half-empty tank during the pre-dive checks. As a general rule, the average pressure of a diving air tank is 200 bar. Then, check the system on your air tap: a DIN system (Deutsches Institut für Normung) or an INT system, as shown in the photo below. This system determines the connection you use for your regulator and will help you to save time in the next step.

The configuration of a diving air tank

Before assembling your diving air tank, you should check the pressure in the tank with a pressure gauge.

Installing your buoyancy jacket on the diving air tank

Installing your buoyancy jacket

Once you have completed the above checks, you can install the buoyancy jacket on your front in order to fit it onto the tank. Always place the tank’s air outlet facing you for greater ease of assembly. The Subea jackets have two buckles: one to attach the tank, plus a safety buckle. Then, slip the buoyancy jacket onto the tank, placing the two buckles behind the taps. To attach the strap at the right height, take the following measurement. Place three fingers under the shoulder of the tank, then attach the air tank. Once installed, check by lifting the assembly using the carry handle to make sure that the tank is securely attached. This will keep you well balanced in the water for a more comfortable dive.

Installing your regulators 

The first stage is equipped with several hoses, usually four: the main regulator hose, the yellow hose of the backup regulator, or octopus, the pressure gauge hose and the direct system hose used to inflate the buoyancy jacket. Stand behind the tank to avoid connecting the hoses in the wrong places. Take the main regulator hose in your right hand, and the direct system hose in your left hand. Then, put the thread in the orifice of the tank and screw fully home. There is no point in tightening any more. The pressure will do the rest! Then, connect the direct system hose to the jacket inflator, which comprises a ringed hose and a purge used to inflate and deflate the jacket. This hose is attached like a garden hose by simply pulling the ring towards the rear. Now, carefully stow the hoses, with the direct hose along the ringed hose. The octopus can be hooked onto the straps of the jacket or an octopus or hose holder. Keep the pressure gauge in a place where it can be found easily underwater.

Mounting the regulator on the diving air tank

Opening the air tank and checking the pressure gauge 

Now that everything has been installed, slowing turn the tap until fully open. Then, turn back by one-quarter turn and check the pressure on the pressure gauge.

Checking the pressure on the air tank pressure gauge
Checking your diving equipment

General equipment check 

Once assembled, check that all the equipment functions properly: the direct system, the main regulator, the octopus, the pressure gauge position, the purge and any additional equipment you plan to use during your dive. You are now ready to take the plunge and smile underwater! :-)

NOW YOU KNOW HOW TO PREPARE YOUR DIVING AIR TANK! REMEMBER TO DOUBLE-CHECK YOUR EQUIPMENT WITH YOUR DIVING MATE, AND ASK THE INSTRUCTOR TO CHECK EVERYTHING BEFORE EACH DIVE. THESE STEPS ARE ESSENTIAL TO PROTECT YOUR SAFETY AND TO ENJOY A PLEASANT DIVE. NEVER FORGET THEM!

Victor, diving sales assistant at Decathlon Dunkirk

Victor 

Diving sales assistant - decathlon dunkirk 

I work as a sales assistant in the diving and board sports department at Decathlon Dunkirk. I started diving when I was a student.