Right above the attic access - sloping down the right is the "feed" line from the compressors. Coming toward you on

Right above the attic access - sloping down the right is the "feed" line from the compressors. Coming toward you on the right is the pipe pictured previously, slowing down and away to the far end of the shop. Going up and over the light to the left is a "T" that supplies the left (west) side of the shop and it's sloping line to the far end.