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CSI Tank sumps are protective enclosures for pumps, piping and other <br /> accessories above the tank top. Tank sumps should be watertight and <br /> durable since they will protect the surrounding environment in the event <br /> of a piping leak. <br /> For nearly 20 years CSI has been perfecting the fiberglass tank sump <br /> design and installation process creating the most reliable and contractor <br /> friendly sump line available. Our proven technology has been utilized in <br /> thousands of installations. <br /> Reasons for choosing a CSI Tank Sump <br /> • 30-Year structural and corrosion warranty <br /> • Extensive fuel compatibility <br /> • Contractor friendly EZ-Fit adhesive channel <br /> • Watertight lids and joints ' <br /> V <br /> Fiberglass CSI tank sumps are installed to protect the surrounding environment from potential leaks and provide a <br /> watertight access point to service pumps and piping. <br />