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MAINSAVER™ TO EXHIBIT AT THE NASTT NO-DIG 2007 SHOW

GOLDEN, CO - Following an intensive year of product research and development, and testing, MainSaver™ located in Golden, Colorado, is ready to debut its Class III interactive pressure main rehabilitation system at the NASTT No-Dig 2007 Show at the Town and Country Resort and Convention Center in San Diego, CA from April 15-20, 2007. MainSaver will be located at booth 102 in the exhibit hall.

MainSaver is NSF-61 Certified and specifically designed for the trenchless rehabilitation of 4-12 inch (100-300mm) water mains. MainSaver is a composite lining system that combines the hydraulic efficiency of a close-fit polyethylene liner and the corrosion suppression benefits of cement mortar linings. During installation the liner tube is pulled into the sectioned and cleaned host pipe and affixed with proprietary installation equipment. Cement grout is then injected into the void between the liner tube and the host pipe wall. A rounding swab under air pressure is used to simultaneously round the liner tube and distribute the cement grout. The grout is forced into any corrosion holes or leaking joints, sealing all leaks and cracks.

Once the grout hydrates under constant pressure, the liner is inspected, certified, and return to service procedures may be commenced.

MainSaver's Vice President for Technology, Dan Cohen, and inventor/Technical Consultant, Peter Wood, will be detailing the evolution of MainSaver from a prototype concept to a viable water main rehabilitation product on Tuesday, April 17 at 4:20 pm in a technical session entitled, "Lining Potable Water Pressure Pipes Using the MainSaver™ Process."

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