Award Bid - 2024 Sewer and Manhole Rehabilitation Proj No. 122-019 - Visu-Sewer, LLC

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described previously, the tube is ready for filling. Begin pumping resin until the resin nears the resin transfer pipe. Slowly fill the area of the tube behind the kinked portion of the tube with the catalyzed resin. Once the resin fully saturates the entire cross section of the felt tube, the vacuum on the tube should become noticeably stronger. As the vacuum becomes stronger the resin front should become visible past the clamped area and will creep down the tube at a discernible rate. Full saturation is obvious as the darker resin fills and replaces the snowy white appearance of the felt tube. Areas that are not properly wet out appear as snowy white patches or blotches on the surface of the tube. An ideally wet out tube has no white spots at all. Do not remove the vacuum to dissipate the vacuum in the tube and allow the resin to freely run down the tube. Relieving the vacuum in the tube and allowing it to run will create white patches that will never become fully saturated with resin. If possible, the tube should be filled with the calculated estimate of resin necessary to saturate the entire length of liner to be installed. Do not overfill the unrestrained tube on the belt as this may stretch the felt liner and result in wrinkles in the final CIPP. When the calculated estimate of resin necessary for the entire wet out exceeds the initial filling constraints, multiple resin injections are necessary. See Section for the recommended procedure on multiple resin injections. After the tube has been filled with the calculated estimate of resin, the resin transfer hose is removed and the end of the bag sealed. Duct tape has been found to work well for closing off the end of the liner. Sealing the end of the tube serves two purposes. First, it prevents excess resin from spilling out in the wet out area during the completion of the wet out and loading of the liner. Second, the sealed end will prevent water and debris from entering into the tube as it is lowered through the manhole and into the host pipe. MULTIPLE RESIN INJECTIONS INTO THE TUBE When it is not possible to pump all the resin into the tube at one time, multiple resin injections must be made to saturate the entire length of the tube. After the initial resin filling and sealing of the tube, the liner wet out will proceed using the resin in the liner. As the resin slug is absorbed by the felt, it will become quite small. At the point when the resin slug extends approximately 5-10 feet from the pinch rollers and is relatively small in the tube, the wet out should be stopped for a second injection of resin. Always inject resin above the slug so that filling can continue without affecting the vacuum on the liner. Where possible, the tube should be elevated in the area of the injection to prevent the pumping resin from