The Pump Action Screen (PAS) is a simple and robust CSO
mechanical screen which consists of a half round stainless
steel basket with 6mm perforations, submersible pump,
distribution pipework, and a venturi. It is designed to prevent
the discharge of non-biodegradable solids greater than 6mm
in two directions. The screening debris is scoured from the
underside of the screen basket and punched passed the end
of the screen eliminating potential representation.