Storage Tank, Fill Opening Diameter 18 in, Graduation Mark Increments 2 gal, Liquid Storage Capacity 30 gal, Overall Diameter 18 in, Overall Height 32 1/2 in, Standards NSF/ANSI/CAN 61 Certified, Tank Material HDPE, Tank Material Thickness 1/4 in, Tank Opening Type Open Top, Maximum Operating Temperature 140 Degrees F, Color Natural, Fill Cap Diameter 22 in, Maximum Liquid Temperature 140 Degrees F, Shape Round, Tank Orientation Vertical, Tank Wall Style Single Wall