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
- Clean the plug and cable with Deoxit Gold www.amazon.com/s?k=Deoxit+gol...
- Mineral oil can be useful on deep dives to prevent cable flooding, but not required

[@incoldblooderz]

Is there any chance to split one cable and use two computer at the sametime?
And i can use in all rebreathers?

[@jamesd9306]

Good video. What is it being replaced with?. I like the idea of a detachable connection (usually only to avoid having to send the entire thing in for service if a single part was playing up) but wonder what other options are out there. Is there anything like wet plugable EO connectors or something more robust?

[@DivetechLtdWestBay]

Over the past few years, most rebreather manufacturers have switched to a a 4-pin wet mate-able plug.

[@bobdankert]

@@DivetechLtdWestBay Is that what the KISS 4-pin connector is? If so - how does one get a Shearwater compatible with that connection?

[@DivetechLtdWestBay]

@@bobdankert Hi Bob. The 4-pin is something different than what's in this video. The 4-pin connectors are available from your respective rebreather manufacturer, for both the rebreather side and your computer side. Send us an email if you have more questions and we can help you figure it out. [e-mail].

[@bobdankert]

@@DivetechLtdWestBay Correct - I wasn't referring to what's in the video, I was referring to the newer KISS 4-pin connector. Anyways, the lack of 4-pin dive computer availability (ie Shearwater) seems a bit concerning, currently, for devices using the 4-pin web mate-able plug previously mentioned.

[@DivetechLtdWestBay]

​@@bobdankert Hi Bob. I understood your question. The 4-pin wet mate plug is common to any rebreather using an analog set. For digital sets, they use 5-pin. But you cannot buy them from Shearwater dealers, you must go through your rebreather manufacturer. They are very common, most rebreathers use these wet-mate plugs now.