Recognised for their reliability and performance BlueVort 7 has an open vortex design and can handle pumping soft solids up to 15mm. It has been designed as a multi-purpose submersible pump also suited for drainage and water transfer applications.
https://www.claytech.com.au/our-products/drainage-pumps-claytech-pumps/dirty-water-vortex-pumps-claytech-pumps/