Pump & Valve were asked to look at an application to divert waste water from a dairy factory past a failing drain that could not be repaired. The application was made especially difficult as the customer had already installed a 5m deep below ground tank with a very small opening – far too small for a conventional submersible pump. The waste in-flow varied from 1 – 330m³/h and the waste water went from being acidic to alkaline and from hot (up to 70°C) to cold