1/2/3/4-inch Pump Heads, High-Flow Water Pumps for Irrigation and Watering 1-inch Trailer-Mounted Concrete Pump Power Requirement: 1.5–3 HP, RPM: 3600 Suction Head: Approx. 6 m Maximum Flow Rate: Approx. 10 m³/h; Head: Approx. 21–25 m Inlet/Outlet Diameter: 25/25 mm (1 inch) Inlet/Outlet Flange Thickness: 3 mm Material: Pump housing/connectors: aluminum; Pump feet/impeller/pulley: iron Pulley dimensions: Outer diameter 57 mm × Width 32 mm × Inner bore 19 mm (Type A) The pulley rotates clockwise for normal operation (counterclockwise when viewed from the front) Package Dimensions: L 30 × W 18 × H 19 cm Overall Dimensions: Approx. 33 × 27 × 18 cm Weight: Approx. 7 kg