Name this tool!

[derekf]

The 3 regs are "relieving" type that do exactly what you said, they bleed off pressure to maintain the setting. The 4th is non-relieving which is used a lot on bottled gasses (welding, torches, etc). I would use relieving on the air lines.

Thanks, Darren.



Can you give some insight as to why one would be better off using the relieving style on air lines? I would (with my uninformed opinion) have thought that not bleeding off air would give a more consistent pressure since it would reduce the amount of running the compressor would have to do?