4.4 SR 04-19-2021 - Laserfiche WebLink

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City of Elk River Design Standards DUCTILE IRON PIPE SADDLE REQUIREMENT Special Class 52 Special Class 50 Pipe Size Inches 4 6 8 10 12 14 16 18 20 24 Wall Thickness Inches .29 .31 .33 .35 .31 .33 .34 .35 .36 .38 Corporation Stop Pipe Thickness in Inches Inches Required for 3 Corporation Stop Threads Above Line - Without Saddle 3 /4 .31 .28 .27 .26 .25 .25 .25 .24 .24 .24 1 .38 .34 .32 .31 .30 .29 .29 .28 .28 .27 1-1/4 .45 .39 .36 .34 .33 .32 .31 .30 .30 .30 1-1/2 .44 .40 .37 .35 .34 .33 .32 .32 .31 2 .48 .44 .41 .39 .37 .36 .35 .33 Below Line - With Saddle The flaring of copper tubing ends shall be accomplished only with the use of the proper size and type of tools as designated for the purpose, and will provide accurate sizing and rounding of the ends. Tubing shall be cut squarely and all edge roughness shall be removed prior to flaring. All couplings shall be tightened securely, so the flared end fits snugly against the bevel of the fitting without leakage. The flared joint couplings shall be made up without the use of jointing compounds. Unless otherwise indicated, tap service lines shall be installed on a straight line at right angles to the watermain or property line. The service line shall be terminated with a curb stop and box at the property line. When the service lines are to be terminated beyond the curb stop and box at the property line, then the service line extension shall be terminated with a compression fitting and cap, suitable to pressure test against. This longer service line may be required to avoid future sidewalk disruption or conflicts with utility lines within the utility easement along the front of the lot line. The service pipe and curb stop coupling depth shall be such as to maintain not less than 7.5-foot minimum cover, or in locations where conflict may occur with storm sewer, service pipe shall be placed at least 3 feet below the storm sewer invert or shall be insulated. The service box shall be screwed onto the curb stop coupling and be firmly supported on a concrete block. Service boxes shall be installed plumb and be braced effectively to remain vertical during and after completion of backfilling. The service boxes shall be brought to final surface grade when the final ground surface has been established. Setting Valves, Hydrants, and Fittings Hydrants shall be installed plumb. The large pumper nozzle shall be oriented squarely facing the street. If the hydrant installation results in the pumper nozzle not facing the street, the hydrant head shall be rotated accordingly. The traffic flange of the hydrant shall be set with the bottom of the flange 2 inches above finish grade. When a hydrant barrel extension is installed the traffic flange shall be adjusted to remain at 2 inches above the finish grade. © City of Elk River, Minnesota -All rights reserved 13