Graco”s Husky air-operated, double-diaphragm pumps feature 1/4″, 3/8″, 1/2″, 3/4″, one-inch, 1.5-inch, two-inch, and three-inch sizes with maximum flowrates from 5-275 GPM for transferring paint, industrial chemicals, ink, cleaners, adhesives, sealants, and lubricants. The self-priming pumps are based on the patented Husky air valve with closed-center design, which is configured to eliminate sticking commonly experienced with spool-valve models. A variety of construction materials are available to meet exact fluid transfer requirements.