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The Versa-Matic E4AA2R220 pump is an air-powered double diaphragm pump made with aluminum and Buna-Nitrile inner components. It has a 1.5" NPT suction inlet, a 1.25" NPT discharge outlet, and a max flow rate of 70 GPM. Reliably and safely transfer chemicals and liquids with this bolted, corrosion-resistant, leak-free pump.