ARO piston pumps provide industry proven dependability, economy, and precision control for the delivery of a wide range of flowable materials. The efficient, simple design and construction of ARO piston pumps are the reason they are recognized as one of the most dependable, versatile and accurate on the market. Whether you’re moving a small amount of low viscosity fluid a few feet or a large amount of high viscosity material a longer distance, ARO has a pump to meet your application needs. Ingersoll-Rand/ARO Drum Pump Packages are a quick, convenient method of putting a pump into service. These packages come with everything needed to transfer fluid from 55-gallon drums. They feature ARO’s popular 1/2" (port size) diaphragm pumps in Polypropylene, Aluminum or Stainless Steel. Windshield solvent, automatic transmission fluid, antifreeze. An excellent delivery pump for all types of fluids, the Ingersoll Rand / ARO 1/2” (12.7 mm) diaphragm pump is the best-selling diaphragm pump in the country – and it’s covered by a 5-year warranty.