Safety Factor for Water Pressure Tanks Less Than 1,000 Gallons Conditions under which a small water system may qualify for an exception to the standard 4:1 safety factor. For this exception
to be available, the water pressure tank must have a capacity of less than 1,000 gallons.
Storage Tank Cover Slope and Ponding Conditions under which minor ponding on steel or concrete storage tank roofs may be considered not to be a violation.
