Cal Pumps These 304 stainless steel/bronze constructed submersible or open air pumps are continuous duty but not self-priming. They are ignition protected complete with a six foot power cord. The 320 has a 316 stainless steel shaft, the 580 and 1200 are 304 stainless steel with hard chrome plate. All have thermal overload protection and viton double lip seals. US Coast Guard approved. Capacity: 580 GPH Inlet: 3/4" NPT Outlet: 1/2" NPT Horsepower: 1/15 Voltage: 230 VAC Amps: 2.5