Air Operated Double Diaphragm Pumps (AODD) pumps are a very useful tool for a variety of applications. Here at Blue Tank and Pump we offer different models of AODD pumps for your specific application. The pumps range in size from ¾” up to 3”, Each pump is for different job site applications. These pumps are often used to transfer, fill, recirculate, and batch in chemical industrial and water/wastewater treatment. Our in-house engineering team can help you size and determine material type to suit your needs.