ESSCO is a member of the Hydraulic Institute and all performance tests are conducted to meet the standards set forth by the Institute. All ESSCO pumps are cast, manufactured, assembled and tested in the United States. In addition to manufacturing pumps, Engineers Sales-Service Co., Inc. has a Control Panel Division which produces only U.L. listed control panels. The same high quality that goes into every ESSCO pump also goes into every ESSCO electrical control panel.