Do J-Valves Increase Breathing Effort?
- There was a discussion on another forum about how SPG needles will move when you breath using a J-Valve in the up position. I checked out my own J-Valves and they all did it just as Herman said they would. But in the process of breathing with the J-Valve up and with it down, I think I detected the breathing effort to be a little harder when the J-Valve was up (reserve "ON").
- Am I just imagining that?