March Pump's AC-5B-MD Beer Pump is an American made seal-less centrifugal magnetic drive pump ideal for homebrewing. It is capable of generating a maximum flow of 17 gallons per minute at 1 foot, and its maximum head is 27 Feet (or around 11PSI). The standard wet end (the materials that come into contact with the solution) is composed of Polysulfone, Buna N, Ceramic, and Ceramic Magnet.