Drainage pumps made of cast iron and stainless steel . Mechanical seal and open impeller with abrasion resistant rubber coating. Versions with and without float switch are available. This range consists of three pumps with up to 0.75 kW (1HP) rated power. Specifications Delivery: up to 17 m³/h Head: up to 20 m Power supply: both single and three-phase 50 and 60 Hz Power: from 0.55 kW up to 0.75 kW Temperature of pumped liquid: to 50 °C Maximum immersion depth: 5 m Free passage: up to 5 mm.