Behind the garden by the main door is a large storage shed. The door to the shed is not locked, so anyone can access it when they need too. Please use caution, as bees and wasps have been known to use this area to build their nests here.
When running the compressed air on a humid day, a lot of moisture builds up inside the air tank. If left unattended, this moisture will rust a hole though the holding tank causing the compressor to fail. Replacement for compressed air units of this capacity run upwards of $3,000-$7,000 (2016 prices). Needless to say, if this unit fails it will be a bit before NPL can absorb that sort of expense!
To drain the holding tank, just turn the handle to the 'open' position. Leave it open until moisture stops rushing out, then close it all the way . Leaving the drainage pipe open will result in insufficient pressure to run air scribes or abrasion units. If you notice very low pressure, or if you hear the compressor constantly running, please go check the drainage pipe.