Can you elaborate on this a bit? My revo uses a basic Draeger DSV (inhale mushroom in a spider on my right, same thing for exhale on my left), and when I mentally flip the DSV I just don't see any problem for the DSV itself. Yes, I'll be pulling gas from the left and pushing it out to the right, and on the revo that's not good for a number of reasons...but it shouldn't hurt the mushrooms themselves. Am I missing something, or is it maybe the Hollis design different?
I did not say it would damage the mushroom valves, If the hoses of the lower loop are put in reverse, it would put the 2 mushroom valves together facing each other, so it would not work on an inhale nor exhale. The Prism2 works opposite- Inhale is on the left & exhale is on the right. One mushroom valve is on the inhale hose going into the DSV & the other is on the exhale side of the DSV. The threads on the DSV & corrosponding loop hose are keyed differently from one side to the other. You would not be able to completely screw the DSV onto the wrong hose without probably destroying the threads & you would not get a successful & proper positive or negative.pressure test
---------- Post added November 27th, 2014 at 06:53 PM ----------
How are the counterlungs attached to the harness?
Do they use identical types of Fastex buckles, like smaller versions of the waistband buckle? Those things are interchangeable, and even work inverted.
The counterlungs are attach up top by a "Y" shaped "yoke" that attches to the H-frame via the backplate & wing bolts, The CL's are held on by a double side flap of velcro, with the CL velcro sandwiched in between & a large buckle (like on a waist belt of a BC). There are straps that attach to the backplate & another to the waist belt attached by QD buckles. I personally use 2 snap bolts on either end of a piece of bungee, from 1 bottm Cl D-ring, routed through my crotch strap, up to the other side bottom CL D-ring (makng a "V") instead of the 2 straps.