RIO 4hp (SHFm-4000) Centrifugal Water Pump.Technical Specifications BreakdownModel: SHFm-4000 (Centrifugal Pump)Horsepower (HP): 4 HPPower Input: 3.0 kWVoltage / Frequency: 220V / 50Hz (Single-phase electricity)Maximum Flow Rate (Q.Max): 1500 Liters per minute (L/min)Maximum Head (H.Max): 16.5 meters (The maximum height the pump can push water straight up)Maximum Suction Head (Suct.H): 7 meters (The maximum depth from which it can draw or pull water up to the pump)Inlet / Outlet Size: 4" x 4" (Uses 4-inch diameter piping for both suction and discharge)Rotational Speed: 2850 r.p.m (Revolutions per minute)