Since 1986, All-Flo AODD pumps have been built to last. Designed to live up to their name, All-Flo AODD pumps are performance engineered and quality built to provide trouble-free service under the toughest conditions. All of our diaphragm pumps are 100% factory tested for quality assurance. Our AODD pump’s air mechanism features the fewest moving parts of any pump on the market. With fewer parts to wear and breakdown, the result is reduced risk of disruptions in service and reliable operation. When it comes to simplicity of design, see for yourself how our pump stacks up against competitors. See our page "How It Works."