Clogged filters often cause slow dispensing rates, forcing owners to change filters weekly or even more often. Frequent filter changes are only a temporary solution to a recurring problem; the build up of contaminates in underground storage tanks must be removed, in order to solve the problem at the source. Contaminates enter fuel systems through fill pipes, spill bucket drains, during construction or maintenance work, and during product delivery. Contaminates can also originate inside the UST through internal corrosion or growing microorganisms. Fuel contaminants can cause frequent maintenance problems, damage to fueling system components, and failing Stage II vapor recovery tests, as well as damage to customer vehicle fuel systems.

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