[FrankJ]

Originally Posted by dradel

My team couldn't pass inspection due to being on low side. When the students questioned this the inspector just walked away and wouldn't listen to reading of rules or reason.
Personally I don't think it matters one way or the other, but in the name of safety it is safer on the low side in my opinion.

R89 requires the vent valve release all pressure in the system. If the regulator is set to 0 pressure, a low (working) pressure vent will not vent the high pressure (stored) side.