Sand filter, Parkson "Dynasand," model 38 sq. ft., fiberglass construction, tank measures 7' diameter x 14' straight side, complete with upper & lower sand distribution cones, 8" diameter side bottom feed inlet, 24" side bottom manway, 8" diameter filtrate nozzle, 4" diameter top side reject nozzle. Includes top inspection platform & ARO model PD20A, 120 PSI, diaphragm pump with 2-1/2" in/out. Last used at waste water treatment facility with Parkson Lamella gravity setttler (Item# S733644). Serial# DSF 1664. Good condition.