Max. flow: 8.1GPM. Metallic head material: 316L stainless steel Power requirements: 230/460 volts, 1.6 amps, 60Hz, 3 phase. Pump speed controlled by an AC Tech MC1000 series VFD housed in a NEMA 4, 12 enclosure. Installed 1"Ø piping to pump inlet, 1 1/2"Ø installed on outlet with included strainer, back pressure valve, flow calibration column, and pulsation dampener.