Capacity (Gals.)

 
 Riser Diameter

Inside Area (Sq.Ft.)

Outside Area
(Sq. Ft.)
  50,000 4 ft. 3,150 6,500
  100,000 4 ft.  4,300 8,000
  150,000 5 ft 5,100 9,900
  200,000 6 ft 5,900 11,100
  250,000 7 ft .6,700  12,700
  500,000 5 ft. 10,000 19,600
  750,000 Dry 8 ft. 13,600  29,100
  1,000,000 Dry 8 ft 17,000 36,900