How to best care for your rebreather Fischer plug

While the Fischer plug is being phased out of use by most rebreather manufacturers, there are still a large number of rebreathers in the market that have them. The Fischer plug is not rated for diving use, and it's recessed o-ring can cause issues. As such they require a lot of care that many diver's don't understand. This video covers some of the basics of Fischer cable maintenance, with some explanations of why.

John Routley of Narked at 90 points out an error in the video - this connector is the 103 series, not the 104 series. John also points out a potential 'hydraulic effect' that can occur when too much mineral oil is used in the plug. It's not clear from the video, that the connection is not completely full when I plug it in. All other talking points are correct however.

Remember if the o-ring in the plug goes bad, the plug must be replaced by the manufacturer!

Some tips:

- Unplug the cable from your computer after every dive
- Remember to unplug and plug the cable in a clean environment
- Always cap the plug and cable when not in use.
- Clean the plug assembly frequently, and keep free of corrosion
- Mineral oil can be useful on deep dives to prevent cable flooding, but not required

[AJ_Unlimited]

Excellent info, thank you. I’ve been considering the Petrel 3 Fischer and this vid has nailed that decision.