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Premium Weight 1.5 Specific Gravity Plastic Storage Tanks (32)
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Premium weight tanks have been designed and are manufactured to meet a specific gravity of 1.5, equaling 12.5 pounds per gallon at 73 degrees F. (An increase in liquid temperature will substantially decrease the specific gravity rating!)
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Heavy-Duty Weight 1.9 Specific Gravity Plastic Storage Tanks (37)
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Heavy-Duty tanks have been designed and are manufactured to meet a specific gravity of 1.9, equaling 15.75 pounds per gallon at 73 degrees F. (An increase in liquid temperature will substantially decrease the specific gravity rating!)

