This thread didn't go on as long as I had hoped it would , so the data is inconclusive. I used the term "extend-a-stay" as a generic term and Marshall Brass no longer makes it I used the name "Sturi--Stay" because that appears to be the standard industry replacement for the "Extend-a Stay(Flow)".
Now that the disclaimer is out of the way. Two of the replies were neither before or after the regulator and two and a half were after the regulator, and 6 and a half were before the regulator. The half is actually a forth choice of between the high side regulator and the low side regulator where the respondent had a two stage regulator.
As noted by Dutch_12078, the only difference between the extend-a-flow and the extend-a-stay is the tap for the hose to an external tank. the same terminology is applicable to the Sturgisafe kits. The illustrations for the Camco device show an extend-a-safe type fitting. It should also be noted that in order to use a quick disconnect, the fitting would have to come after the regulator as the only LPGas approved quick disconnects I could find were rated for 11" WC.
I made an assumption that because my oft maligned entry level RV had the extend-a-stay type fitting as standard equipment, that most RV's(Classes A and C) would have one too. I'm not excluding "B"s here and I would assume them to be similar to "A's" and "C"s, but I have never looked.
So I would hope those who say "MOST RV's have the tap off after the regulator" would consider saying for high pressure or for low pressure rather than generalizing that most are low pressure.
