DennisW
Contributor
If most people will think about the reason for the LP hose failure emptying a tank quicker, they will understand. Someone earlier in this thread mentioned the interior diameter differences between the LP and HP hoses. (I gave them a thank you for that.) The issue here is not pressure, but volume. The LP hose allows a much larger volume of air to escape than the HP hose can allow, therefore emptying the tanks much faster. I was witness to an HP failure years ago (the SPG blew out) and the diver calmly started his ascent. There was plenty of air for him to make it to the surface. BTW, I was taught this in my OW class.