Storage Tank, Fill Opening Diameter 12 in, Graduation Mark Increments 0.5 gal, Liquid Storage Capacity 5 gal, Overall Diameter 12 in, Overall Height 15 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 16 in, Maximum Liquid Temperature 140 Degrees F, Shape Round, Tank Orientation Vertical, Tank Wall Style Single Wall