Regulator and Tank Valve Terminology

[CRT2]

When did the octopus (alternate 2d stage) terminology change to third (3d) stage and why?

When did the K valve become yoke valve and why?

 

[BoltSnap]

third (3d) stage

Say whaaa?

When did the K valve become yoke valve and why?

A "K valve" can be "Yoke/International" or a DIN Valve.

 

[Rilelen]

When did the octopus (alternate 2d stage) terminology change to third (3d) stage and why?

I have never heard this. It’s an alternate second, or an octo.

 

[BoltSnap]

I have never heard this. It’s an alternate second, or an octo.

NASDS used to call it "safe second" but never heard what the OP said.

 

[macado]

I've never heard the term third stage in reference to a scuba regulator. It doesnt actually make any sense. Where is this being referenced / taught?

K Valve originally was called that because it was labeled K in the Aqualung catalog. I'm not sure where the terminology Yoke / A-Clamp came from but I am sure someone knows the origin. The irony is it used to be called the International Valve

 

[CRT2]

Say whaaa?



A "K valve" can be "Yoke/International" or a DIN Valve.

From “The Chairman” December 27, 2002: “I use DIN... and a DIN is not a K valve with different threads. The names K and J came from a Scubapro catalog long before I started diving. They numbered all of the items on their pages, A, B etc. Well the "reserve" valve was labeled "J" and the basic valve was labeled "K". That's it. DIN came later from Germany as their engineers can't seem to leave well enough alone.”

Really confusing and it seems the tank valves are DIN and K but a “Yoke” adapter is necessary to use DIN 1st stage on K valve.

 

[lexvil]

From “The Chairman” December 27, 2002: “I use DIN... and a DIN is not a K valve with different threads. The names K and J came from a Scubapro catalog long before I started diving. They numbered all of the items on their pages, A, B etc. Well the "reserve" valve was labeled "J" and the basic valve was labeled "K". That's it. DIN came later from Germany as their engineers can't seem to leave well enough alone.”

Really confusing and it seems the tank valves are DIN and K but a “Yoke” adapter is necessary to use DIN 1st stage on K valve.

It all becomes easier to understand when you realize it doesn’t matter when or why.

 

[CRT2]

It all becomes easier to understand when you realize it doesn’t matter when or why.

Words and definitions are important - I dislike all the verbiage changes occurring today in this country.

 

[lexvil]

Words and definitions are important - I dislike all the verbiage changes occurring today in this country.

It’s doesn’t change anything, when I started the were just called valves.

 

[Johnoly]

Some shops doing reg rebuilding are charging " per stage ' and separating out labor and parts cost on different customer invoice lines. So they list 1st stage, 2nd stage, & 3rd stage. It helps their computerized inventory and subtracting the correct parts kit SKU numbers for on hand and reordering.
Not that it's right/wrong/correct,,,,,,it's just helps when a customer asks why they are being charged for two 2nd stages on the invoice.