Used 11.7 Square Feet 304-SS Cartridge Filter, rated 100 PSI @150 deg F. Filter area of each element - .65 Sq Ft.Nozzles: 2" in, 2" out, 1" drain. Built 1976 by Commercial Filters (Div of Carborundum), Model #4SF6-3-2FE. NB #215. Leg mounted. 15" x 15" x 47" H. Wt: Approx 175 lbs. (Qty -2 available)