"Kaiser" wrote in message
...

snip

Spray guns, Blow guns, Tyre inflators don't need lubrication.

Another point is that the above tools often require any lubricant in the air
supply to be removed using a suitable trap, especially spray guns.

Nail guns /
staplers do need lubrication, you can lubricate them manually or buy an
inline oiler for constant use.

But there should be a water trap before the tool.


The variable pressure regulator normally controls pressure on one of the
outlets, the outlet other may be unregulated.


If the unregulated outlet is low down on the tank it could be intended as a
tank drain, and certainly if it is at the bottom, to allow trapped water to
be removed.