Storage Tank Fill Opening Diameter 48 in Graduation Mark Increments 50 gal Liquid Storage Capacity 500 gal Overall Diameter 48 in Overall Height 70 1/2 in Standards NSF/ANSI/CAN 61 Certified Tank Material HDPE Tank Material Thickness 3/8 in Tank Opening Type Open Top Maximum Operating Temperature 140 Degrees F Color Natural Fill Cap Diameter 53 in Maximum Liquid Temperature 140 Degrees F Shape Round Tank Orientation Vertical Tank Wall Style Single Wall