The underdrain system is comprised of pultruded FRP partition plates, molded ABS media support panels and rugged ABS nozzles.
All components are corrosion-resistant and assemble quickly for easy installation.
Backwashing is accomplished with a single pump, indexing hood system that isolates and cleans each cell in turn. Air-scour cleaning is an available option. Two hood transport systems are available. One is a conventional track-mounted traveling bridge that spans the filter basin and suspends the hood from above. The other is a pneumatically-actuated tractor that propels the hood along a guide rail mounted directly atop the cell partition plates without the need for a bridge.