Regulators: Predive procedures


Do not attempt to connect low pressure hoses to the high pressure ports with the use of an adapter. Improper
connection will cause damage to the equipment and could result in serious personal injury. Low pressure
components are not intended to withstand pressures greater than 28 bar (400 psi). When installing your

accessory hoses, avoid damaging the o-ring. Tighten gently, but firmly into the first stage housing.


SCUBA complying with EN 250 are not intended for more than one user to breathe from at the same time.
If SCUBA are configured and used by more than one diver at the same time, then the cold water and

breathing performances may not fulfill the requirements of EN 250.



1. Position the tank valve so the outlet points toward the diver.


2. Remove the dust cap from the first stage inlet and place the yoke (or DIN adaptor) in the center of the

cylinder valve connection.


3. Position the first stage body so that the second stage hose goes over the right shoulder of the diver.


4. Hand-tighten the yoke screw or DIN adapter screw.


5. Check all hose connections to the first and second stages. If they can be loosened by hand, they should be

tightened with a wrench prior to pressurizing the system.


6. Check the submersible pressure gauge/instrument to make sure it indicates zero pressure.


7. Open the tank valve slowly to gradually allow air into the regulator.

NOTE: During this operation, depress the second stage purge button to reduce shock to the valve
mechanism. Do not perform this operation in a cold environment below 10°C (50°F). Performing this
in a cold environment may cause “freeze-up” of the regulator which can render it inoperable. If this
occurs, you should contact Survival Sports the TUSA authorized service center in Cyprus.


8. Check the submersible pressure gauge/instrument to ensure that it indicates the proper tank pressure.


9. Check the tank/regulator connection for leakage. If leakage exists, it may be caused by incorrect mounting

of the regulator on the tank valve, or by a damaged o-ring in the tank valve.


10. To confirm that the regulator delivers air properly, first exhale through the mouthpiece to blow any foreign

matter out of the second stage, then inhale. A few of these breathing cycles should immediately indicate
proper function.


11. If you are using the second stage as an Octopus regulator, it is strongly recommended to utilize an Octopus

plug to prevent any foreign matter from entering the second stage through the mouthpiece.


12. When the second stage is not in your mouth, uncontrolled air delivery can take place. This can be stopped

by turning the second stage upside down and allowing it to ll with water. Should the air delivery continue,

abort the dive and have the regulator inspected by Survival Sports, the TUSA Authorized Service Center in Cyprus.