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Good alignment shall be preserved during installation. The deflection at joints shall not exceed that recommended by manufacturer, Fittings, in addition to those shown on the Drawings, shall be provided, if required, in crossing utilities that may be encountered upon opening the trench. Each length of the pipe shall have the assembly mark aligned with the pipe previously laid and held securely until enough backfill has been placed to hold the pipe in place. Joints shall not be "pulled" or 'cramped." Before any joint is made, the pipe shall be checked to assure that a close joint with the next adjoining pipe has been maintained and that the inverts are matched and conform to the required grade. The pipe shall not be driven down to grade by striking it. Precautions shall be taken to prevent flotation of the pipe in the trench. When moveable trench bracing such as trench boxes, moveable sheeting, shoring or plates are used to support the sides of the trench, care shall be take in placing and moving the boxes or supporting bracing to prevent movement of the pipe, or disturbance of the pipe bedding and the backfill. Trench boxes, moveable sheeting, shoring or plates shall not be allowed to extend below the top of the pipe. As trench boxes, moveable sheeting, shoring or plates are moved, pipe bedding shall be placed to fill any voids created and the backfill shall be re -compacted to provide uniform side support for the pipe. Concrete thrust blocks shall be installed at all fittings and other locations as directed by the Engineer. Minimum bearing area shall be as shown on the Drawings. Concrete shall be placed against undisturbed material and shall not cover joints, bolts or nuts, or interfere with the removal of any joint. Wooden side forms shall be provided for thrust blocks. Restrained joints shall be installed where shown on the Drawings or as directed by the Engineer. Testing All PE force mains shall be field-tested. Supply all labor, equipment. material, gages, pumps, meters and incidentals required for testing. Pressure test each water main upon completion of the pipe laying and backfilling operations, including placement of any required temporary roadway surfacing. All force mains shall be tested at 150 percent of the operating design pressure of the pipe unless otherwise approved by the Engineer. The operating design pressure of the pipe is 100 psi. 'The test pressure shall be measured at the highest point along the test section by a recording type pressure gage and a copy of the readout shall be submitted to the Engineer upon completion of the test. All testing shall be conducted in the presence of the Engineer or his/her designated representative. Testing shall be conducted after backfilling has been completed and before placement of permanent surface. 02627-6 DADIVISION 202627 Force Mains - Polyethylene Pipe.doc