That is,a correct statement. My shop partner and myself, picked up a unknown dual piston /100 gallon tank: 150 bucks. Silent & smooth as silk,kept up with dual d.a. sanders at one time. It finally died,it's own death.(Reed valve,couldn't find one,'04) . The replacement was a 4 bill Ingersoll- Rand 5 horse /60 gallon upright. Did it's job,with lots of noise. The older equipment, was simply assembled better....