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

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When splicing two hoses together always place the hose with out flowing water approximately 8- 12 inches inside the hose receiving the water. All subsequent splices on a section of layflat must be made in a similar manner. To complete the splice use a 0.25-inch hole punch or drill bit to make eight holes, four on each side, spaced approximately 2 inches apart and approximately 0.5 inch in from the edge of the outer hose. The holes must extend through both hoses. Then, using eight pieces of 0.188-inch nylon rope individually tie the ropes through each set of overlapped holes and secure with locking knots. If the hose is positioned incorrectly with the out flowing water hose over the outside of the receiving hose, the receiving hose will collapse and circulation will not extend beyond that point in the tube. In addition, when pieces of previously joined lay flat hose are being mended together, the splicing direction must be an essential area of attention. For installations of 12" diameter and above, an alternate method of splicing the circulation hose is “hard-splicing”. This is accomplished by splicing two circulation hoses by means of a hose-barb fitting. First, the end of the first hose is placed over half the length of the fitting from the inside. Punch holes in the hose approximately ½" from the end of the hose-barb fitting and insert ropes through the hole and out the end of the fitting. Next, punch holes in the second hose approximately where holes were punched in the first hose. Pull the ropes inserted in the first hose through the holes in the second hose. NOTE: The holes punched in the hoses must be opposite of each other (i.e., 12 o’clock and 6 o’clock). Pull the second hose on the hose-barb fitting. Using 3/4" banding strap, place two 3/4" stainless steel doubled bands around each hose on the fitting. Wrap the banding with electrical tape to ensure the bands do not puncture the polyurethane coating on the liner. Tie the ropes that are connecting to the two hoses and wrap with duct tape. A last step in the process of preparing the circulation hose(s) is to punch 0.25-inch diameter holes in the hose every 10-12 feet along the length of the blue lay flat discharge hose. Drilling or punching holes every 4 long paces along the length of the discharge hose may approximate this. These additional holes will allow some of the water to push out along the liner and also increase water movement along the liner. Lay Flat End Preparation -- The end attachment of the blue lay flat hose that is to be connected to the liner must be done differently, depending on the size of the liner being installed. For small diameter, lay flat can be folded back over itself to make a cuff at the end of the hose. Punch holes in the end. Nylon ropes can be secured at each hole to make loops by which the lay flat can be attached to the end of the liner. Preparing the circulation hose in this manner allows the hot water to eject directly out the open end towards the end of the installed liner. Alternately, attach a steel or plastic sleeve in the end of the lay flat hose. This will allow the full amount of hot water to be discharged directly towards the end of the liner. For larger diameter installations, of 18-inch to 42-inch diameter, a second circulation hose is recommended. This circulation hose should be placed on a separate pump that provides additional water movement through the liner. This second hose should be configured with a partially opened end to force more water out of the perforations while still allowing water output from the end (See Section "Number of Circulation Hoses"). For pipe diameters greater than 42- inch a third and possibly a fourth pump may be needed to ensure that a good movement of flow exists in the curing of the liner. The additional pumps should be a minimum of 6-inch pumps and the discharge should consist of a 6-inch circulation hose. Weighting Lay Flat Hose -- The lay flat hose should be weighted when rehabilitating any pipes 24 inches or larger in diameter. The hose must be weighted to aid circulation inside the liner since