This week we look at the age old advice of "Always turn the tank valve back a quarter or half turn once on". This rule has been around for a very long time and had good intentions in the beginning but it is now something that should not be followed.
Orginally, SCUBA tanks had valves that would sometimes stick open if the full pressure from the tank was allowed to flow through them. The "rule" continued even after valves were changed to no longer