Dual purpose oil-filled pump that may be used totally submersed or in-line (fed with pipe or hose). For commerical, industrial, and home applications including statuary fountains, water displays, air conditioners, machine tool coolants, and many other applications where liquid must be transferred or recirculated. This compact 500 GPH pump features a 1/2" MNPT discharge and 17.3' shut-off head capability. It is not recommended to use the 3E series in aquariums, swimming pools and fuel oil transfer applications.