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Tank Valve Etiquette

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Don’t be a valve violator

by Jesse Iacono

As with many outdated habits in the scuba industry, there are a couple surrounding tank valves that simply refuse to die. This article serves to identify the two most heinous and commonly occurring of the valve violations. Changing these habits now could save your reputation and even your life.

Take heed of the following advice to avoid becoming branded as a valve violator!

1. The Cap Blaster

Our first valve violator is certainly one who commands the attention of everyone at the dive site. This individual can be found using blasts of gas from their tank to clear excess water off of their dust cap. Although the results of this violation don’t present much of a direct threat to safety, their effects on surrounding divers are often unconsidered.

This method of drying dust caps is no more effective than blowing on them and/or using a towel to accomplish the same task. This method is, however, exponentially louder and completely unnecessary. The sound created can be startling and harmful to the ears of anyone in close proximity as well as a major distraction to the nearby dive professionals, boat crew, and captain. Remember, these are the individuals whose focus on their task has an impact on the safety of those around them. As a dive professional, the sudden sound of gas exiting a tank is interpreted as a red flag that something is wrong and needs to be dealt with immediately. By creating this false alarm, one can expect the focus of the surrounding dive professionals to immediately be drawn to them as a second-nature response. Also, when using a yoke valve, as the gas from the tank is reflected off of the cap and directed back towards the valve face, it can easily dislodge the o-ring, rendering the tank useless until the o-ring is found and replaced or a new one is purchased. The costs associated, although not very significant, can add up over time and are easily avoided.

This habit seems to rampantly spread between divers, sometimes even those who were trained to do the opposite.  Eliminating this one from your repertoire can spread awareness and contribute to the violation’s overall demise.

2. The Quarter Turner

Our second violator is one who finds discomfort in certainty. This individual can be found opening their valve all the way and bringing it back a quarter turn. Such adherence to an antiquated practice could prove to be dangerous and even fatal.

This violation stems from a time when valves could get stuck in the open position if turned all the way open and not backed off by a quarter turn. One can move confidently forward knowing that this situation will not occur when using any of the valves manufactured within the past five decades. For some reason, even though the problem has long been solved, the habit sticks and is still transmitted from some instructors to their students.

When it comes to tank valves, there are only two options – the valve is open or the valve is closed, nothing in between.  When a valve is 100% open, the individual can breathe from their regulator while looking at their SPG and see no movement from the needle that indicates the contained pressure. When a valve is 100% closed, the individual can breathe from their regulator while looking at their SPG and see that it either reads zero or, if previously pressurized, the needle will move towards zero with each breath. During one’s final check, performed immediately before entering the water, this offers no confusion as to whether one will have gas to breathe once in the water.

The danger in the quarter turn violation is due to misinterpretation and inability to distinguish a valve that is a quarter turn opened vs. a quarter turn closed. A valve that is turned on 100% and then a quarter turn off and a valve that is turned off 100% and then a quarter turn on will provide the same results when breathing from one’s regulator and monitoring the SPG at the surface – it will seem as though the valve is sufficiently opened and ready for the impending dive. If one were to enter the water with a valve only a quarter turn open, they would quickly encounter a situation involving a lack of sufficient breathing gas, the results of which would prove to be both undesirable and dangerous.

Although making sure one’s valve is open seems simple enough, a single task can easily be overlooked when combined with the many that are required in preparation for a dive.  Add to this the commotion and excitement typically present at a dive site or on a dive boat and it can be easy to make mistakes. Sometimes it isn’t even oneself that is the violator, but a well-meaning individual attempting to lend a hand. By adhering to the correct valve procedures and making sure to always perform a final check before entering the water, one can begin their dive without question.

In every area of diving, make sure to think smart and safe. Trust the information that dive professionals are presenting, but don’t ever be afraid to ask questions about why certain processes are observed. If something seems counterintuitive, sometimes it just may be…

To find out more about International Training, visit www.tdisdi.com.

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From its humble beginning in 1994 to today, the group of training agencies Scuba Diving International (SDI), Technical Diving International (TDI), and Emergency Response Diving International (ERDI) form one of the largest diving certification agencies in the World – International Training. With 24 Regional Offices servicing more than 100 countries, the company today far exceeds the original vision the founders had when they conceived the idea on a napkin, sitting at a kitchen table in the early 1990’s.

Dive Training Blogs

Dream Dive Locker Build Out. Part I: Demolition (Watch Video)

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It’s finally here! Time to start building the greatest dive locker the world has ever seen! Part I: Demolition! #dreamdivelocker

This is the first of a series of videos showing the evolution of building out my dream dive locker. My dream dive locker needs to be dive gear drying and storage, dry storage, workshop, office, editing suite, You Tube studio and classroom. That’s a lot of functions for a small space!

The first step is planning out the space and demolishing the laminate flooring. Then I taped up the walls to get a feel for the space. We have a lot of work to do!

But finally we will have a purpose built space to house all of our dive equipment! Subscribe to our channel to follow our progress! 

Thanks for watching, Team!

James


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5 Ways To Use Less Gas When Scuba Diving

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5 Ways To Use Less Gas When Scuba Diving. There is no magic wand to having an amazing SAC rate. You have to do the work!

We’re covering how to perfect your core skills as a scuba diver to help you use your gas more efficiently, plus how the art of zen can help you breathe less gas whilst scuba diving.

How can I breath less gas whilst diving? A very common question I get asked all the time and on the subject of breathing itself. There is a right way and many different wrong ways to breath whilst scuba diving. I’ll explain the difference.

Thanks for watching, as always! D.S.D.O James


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