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J. Winterization Assembly: <br />a. If shown on the design, a winterization assembly will be installed downstream of the <br />backflow prevention device. <br />i. The winterization assembly shall include an Isolation Valve that is to be brass <br />or ductile iron that is line-sized with the mainline. Valves can be manufactured <br />by Matco or Nibco. <br />ii. A quick coupler shall be used that is downstream of the isolation valve. This is <br />to be mounted on a schedule 80 or Brass 1x6-inch TBE – Threaded both ends <br />nipple. Quick coupler is to be a 100 Series 1” Quick Coupling Valve or <br />approved equal as accepted by irrigation designer. <br />3.01 INSTALLATION <br />A. Summary: <br />a. Stake locations of each sprinkler in accordance with the plans. <br />b. If discrepancies in the plan become apparent at this time, point out the discrepancy to <br />the Owner's representative. <br />c. Do not proceed with the work until the necessary design engineering changes have <br />been made and approved by the Owner's representative. <br />d. Install sprinkler system equipment with necessary hardware in accordance with the <br />drawings and the manufacturer's instructions and as specified herein. <br />e. Verify system design pressures prior to installation. <br />B. Pipe Laying: <br />a. Minimum cover over mains and control valves is 18" below finish grade. Minimum <br />cover over laterals is 12". <br />b. Minimum of 3" separation between parallel pipes in the same trench. Hold pipe <br />securely in place while joint is being made. <br />c. Rest full length of each pipe section firmly on bedding, excavating recesses to <br />accommodate joints. <br />d. Avoid trench heating electric ducts, storm and sanitary sewer lines, existing water and <br />gas mains, all of which have right-of-way. <br />e. Maintain a minimum separation of 2' from other utilities parallel to irrigation pipes. <br />Sprinkler sections shall drain to the manual drain valve placed at the low point in the <br />section. <br />f. Sand or fine-grained soils should be used for cover to a sufficient depth to prevent <br />damage to the pipe from rocks or other debris in backfill during the compacting <br />operation. <br />g. Do not cut sidewalk, drives, or curb during trenching for piping. <br />h. Use PVC sleeves under paved areas where possible; otherwise, auger bore or tunnel. <br />Repair damaged paved surfaces during guarantee period. <br />i. Cover and protect open pipe ends, fixtures, and equipment from dirt, water, and <br />chemical or mechanical damage during installation. <br />j. AT completion of work, thoroughly clean fixtures, exposed materials, and equipment. <br />C. Laying Plastic Pipe: <br />a. Snake in trench at least 1 foot per every 100 feet to allow for thermal expansion. <br />b. Socket type fittings: Solvent weld by applying PVC primer to both pipe and fitting. <br />Apply solvent to both pipe and fitting, twisting pipe a minimum of 1/4 turn as pipe is <br />inserted to fitting to insure a uniform coverage of the solvent. <br />c. Thread type fittings: Virgin liquid teflon lubricant or teflon tape all male thread <br />components. <br />D. Install Sprinkler Heads: <br />a. Install pop-up spray heads and pop-up rotary heads flush with finish, settled grade. <br />b. Place part circle heads no closer than 1 inch from edge of paved areas and no further