Oceanic regulator - questions about maintenance and repair

[halocline]

the Adapter will make it easier for water to leak in the first stage even if it has a tight dust cap in place. The leakage will come through the threads where the adapter is screwed on the DIN connection on the regulator especially if it is even slightly loose.

That's not true unless he deliberately unscrewed the adapter from the regulator. The adapters seal against the regulator exactly the same way the tank does, using the o-ring in the regulator. Since this was a post-dive soak, it's safe to assume that the adapter was screwed on correctly or it would not have worked on the dive.

The threads in the adapter are exposed during a soak, just like they are exposed during a dive, just like the threads on all DIN tank valves are exposed in use. This doesn't cause a leak. It does occasionally cause an adapter to be very difficult to remove after salt water use if it's not removed immediately or soaked thoroughly.

 

[BoltSnap]

That's not true unless he deliberately unscrewed the adapter from the regulator. The adapters seal against the regulator exactly the same way the tank does, using the o-ring in the regulator. Since this was a post-dive soak, it's safe to assume that the adapter was screwed on correctly or it would not have worked on the dive.

The threads in the adapter are exposed during a soak, just like they are exposed during a dive, just like the threads on all DIN tank valves are exposed in use. This doesn't cause a leak. It does occasionally cause an adapter to be very difficult to remove after salt water use if it's not removed immediately or soaked thoroughly.

Not entirely true from a practical point of view. When removing the first stage from the tank valve and depressurizing the unit and unscrewing the Yoke screw, the yoke adapter will inevitably turn and loosen enough to create path for the water to get in the first stage through the DIN connector. Any careless handling after the removal of the Yoke adapter from the valve until the unit is submerged in water will make it even worse. It is better to remove the Yoke adapter and reinstall the DIN dust cap and soak the DIN first stage in fresh water. The Yoke adapter should also be rinsed in fresh water by itself and then dried properly and completely before next use. I would also put the first stage on a tank with pressure afterward to dry any possible water inside the first stage by pressing the purge button on the second stage as pointed out in a couple of posts above.