These use water and an electric pump to test 1-4 hoses at a time (such as 3/4" to 2-1/2" fire hoses). HTWE4-500: 4 lines up to 500psi & 3gpm, with a 1hp, 50/60 hz, 110V pump. Inlet 2-1/2" Swivel NH/NST, outlets 4x1-1/2" NH/NST with independent ball valves. Refer to our Fire Adapters Section D to get to BAT, NPSH, NPT, and other inlet or outlet threads (N9604- series). HTWE4-800 offers up to 800psi & 5gpm, with a 220V/3-phase pump.