Not sure if this counts as a tool, but still messing with my air compressor plumbing. Trying to create a perfectly dry/clean air side from an air manifold for painting. Have a trans cooler to use for an aftercooler, then will go through a water separator, then into the tank, then to a manifold that one side exits to a copper pipe setup with ball valves to catch the little moisture the trans cooler doesn't get. After that, it goes to another water separator - oil/dirt filter - desiccant setup before hitting the gun. Buddy that has painted for 40yrs thinks it will be perfect. Dunno.
Well, just got the 1" copper pipes sweated. Used a scotch brite to make 'em purtee. Shouldn't be any leaks, but until Spring when I can test it, I will pace. (fwiw.....that 2 position breaker box is disappearing for a full size sub panel on the other side of the garage).
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Then to top it off, I went to a lumber outlet where they were having an anniversary sale. Picked up 100ft of 3/8" Parker Industrial (made in USA) air hose for $26.50 out the door.