The Calpeda GQR series is a drainage type pump and has a wide model range with different configuration options. The pumps of this series have a vertical feed pipe. They can be equipped with an open-type impeller with cutting blades, or the impeller can be a vortex-type with sediment. The pumps of this series are suitable for use with contaminated liquids containing solid particles (silt, sand, stones) and fibrous elements.