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[date: 2014-10-18]
The air compressor for my shop is a 2012 Quincy QT-54, rated at 15.7 CFM at 100 PSI, with a 60 gallon tank.
I could have bought an air compressor with similar specs from a big-box hardware store for half the Quincy's price. However, those are made in China and the quality is just not there. I want to buy this just once. I also like that this air compressor is made in the USA, and it put people to work. I knew my order would be delayed, because it was literally made to fill my order. The serial tag on it shows it was made 8 days before it was delivered.
I bought a large diameter hydraulic hose to give some flex between the compressor and the hard lines.
The hard lines are 3/4" copper (type L) with several drains, and a Milton air filter and regulator. After the regulator, the copper steps down to 1/2". The vertical line headed up is currently capped off, but is there if I someday want to install a loop with drops elsewhere in the shop. On the down leg, there are 1/4", 3/8", and 1/2" couplers just to give myself flexibility. But in reality, 1/4" is the common size for undemanding tools. 3/8" is great for more air-hungry tools (in fact, once I upgraded the coupler on my impact from 1/4" to 3/8", it was far more aggressive). Thus far, I haven't found a use for the 1/2" line, but I have no doubt the Quincy could handle it!