A regulator should not be used for Hookah diving unless it is in conjunction with a "chest harness." The harness serves three principle functions: 1. It keeps the air hose from getting in the diver's way when he is working underwater. The harness has a "back plate" which is automatically positioned over the center of the diver's back when the harness is worn. The back plate holds a "check valve," which acts as a "junction point" for the air hose and the regulator. Since the air hose terminates at the diver's back, it prevents potential entanglements around the diver's body. |
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| 2. The regulator intake hose that attaches to the check valve prevents any pulling motion from the regulator while working underwater. For example; if a diver were moving around underwater and inadvertently came to the end of the air hose, the harness would absorb the shock and the regulator and would not be jerked from the diver's mouth. |  |
| 3. The check valve that is found on the back plate performs the third very vital function. It acts as a "safety gate" by shutting down the air system, allowing the air to travel in only in one direction. Should a burst or leak occur in the air line somewhere between the output of the compressor and the input of the check valve, it could prevent a vacuum occurring in the mouthpiece of the regulator or cause a diver to breath in a large amount of water that could cause panic. “ Never, ever, dive without a harness and check valve!" | |
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