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HomeMy WebLinkAboutWater 1• r GEM ESTATES Meridian, Idaho ATTACEiMENT 1 SECTION 1.01 SPECIFICATION FOR WATER DISTRIBUTION SYSTEM A, PIPS AND F~~T~NGS 1. Sco a This section includes the work necessary for the installation of the water distribution lines and fittings, including but not limited to excavation, backfill and beddings; furnishing all materials; fine grading the trench bottom; providing base for the pipe; laying and jointing the pipe, connecting the new pipelines to the existing pipelines; pouring thrust blocks;-final cleanup; and all incidental and related work. 2. Materials a. Cast Iron Pipe Cast iron pipe for the distribution lines shall be Class 150, push on joint, thin cement lined cast iron pipe and shall conform to the requirements of ASA 21.6 and ASA 21.11 Specifications. The minimum laying length shall be eighteen (18) feet and of the size as shown on the plans. (1) Joints Joints for the cast iron pipe shall conform to the requirements of ASA A21.11 or ASA A21.6 Specifications. (2) Linin Thin cement mortar lining for the cast iron pipe shall conform to the requirements of ASA A21.4 Specifications. (3) Fittings Fittings for the water distribution pipes shall be Class 150 cast iron, mechanical joint fittings and shall conform to the requirements of ASA A21.10 Specifications. Fittings shall be furnished complete with high strength cast iron nuts and bolts, rubber follower gaskets, and cast iron follower glands. b. Polyvinyl Chloride (PVC) Pipe and Fittings The pipe and fittings shall be made of PVC plastic which conform to the requirements of ASTM D-1784 for a Class I Type I compound and shall meet the requirements for a 12454-B compound. The normal lengths of pipe shall be twenty (20) feet and of the size as shown on the plans. Fittings shall be mechanical joint cast iron and all adaptors shall be furnished for transition from one pipe material to another. (1) Gaskets Gaskets shall conform to the chemical and physical requirements of ASTM C-433. The gasket configuration shall be as recom- mended by the pipe manufacturer for the particular pipe in use. Installation shall conform to the manufacturers recommendation.. (2) Bell Section The bell section shall be designed to be of the same strength or greater than the pipe wall. • c. Thrust Block Thrust blocks shall be constructed of concrete having a minimum twenty-eight (28) day compressive strength of 2,500 psi unless otherwise indicated. 3. Workmanship a. Excavation, Backfill, and Bedding All excavation., backfill, and bedding shall conform to Section 2.01, A, Attachment 2, of these specifications. b. Grade The depth of the trench shall be as required to allow for the pipe bedding and to place the top of the pipe at a minimum depth of two and one-half (2 1/2) feet. c. Handling Material Proper implements, tools, and facilities satisfactory to the .Engineer shall be provided and used by the Contractor for the safe and convenient prosecution of the work. In general, slings shall be of heavy canvas or nylon of suitable strength for supporting the load. The use of unprotected chains or cables will not be permitted. All pipe and fittings shall be carefully lowered into the trench, piece. by piece, in such a manner as to prevent damage to the pipeline materials and linings. Under no circumstances shall pipeline materials to dropped or dumped into the trench. d. Hammer Test Cast iron pipe and fittings shall be inspected for defects, and, while suspended abovegrade, be rung with a light hammer~to detect cracks. e. .Cleaning Pipe and Fittings The ends of mechanical joint fittings and push-on joint pipe shall be wiped clean of all dirt, grease, and foreign matter. f. Placing of Pipe in the Trench Every precaution shall be taken to prevent foreign material from entering the pipe while it is being placed in the line. If the pipe laying crew cannot put the pipe into the trench and in place without getting earth into it, the Engineer may require that, before lowering the pipe into the trench, a heavy, tightly woven canvas bag of suitable size by placed over each end and left there until the connection is made to the adjacent pipe. During laying operations, no debris, tools, clothing, or other materials shall be placed in the pipe. g. .Preventing Trench Water from Entering Pipe At times when pipe laving is not in progress, the open ends of pipe shall be closed by a watertight plug or other means approved by the Engineer, and no trench water shall be permitted to enter the pipe. This provision shall apply during the noon hour as well as overnight. If water is in the trench, the seal shall remain in place until the trench is pumped free of any standing water. h. Cutting Pipe The cutting of pipe for inserting valves, fittings, or closure pieces shall be done in a neat and workmanlike manner without damage to the pipe or lining and so as to .leave a smooth end' at right angles to the axis of the pipe. When cast iron pipe is cut in the field it shall be cut as recommended -2- .. • by the pipe manufacturer, and the cut end shall be reconditioned so that is may be used for :the next joint. The outside of the cut shall be ground back or dressed as recommended by the pipe manufacturer and approved by the Engineer.. i. Bell End to Face Direction of~Laying Unless otherwise directed, pipe shall be laid with bell end facing in the direction of the laying; and for lines on an appreciable slope, bells shall (at the discretion of the Engineer) face upgrade. j. Permissible Deflection at JA~nts Were it is ~ecess~py to ~~€l~~t ~fge ~rdm ~ stt g t iin~, eitt~et ~n tf~e ~teftit~i of ~-orizontal plane, to avoid obstruction, to plumb valve stems, or where long-radius curves are permitted, the amount of deflection allowed shall not exceed that recommended by the manufacturer and approved by the Engineer. k. Alignment Pipelines intended to be straight shall be so laid, and in no case shall a deviation from the straight line at any joint exceed one inch. 1. Unsuitable Conditions for Laying Pipe No pipe shall be laid in water or when, in the opinion of the Engineer, trench conditions are unsuitable. m. Jointing Mechanical Joint Cast Iron Fittings Mechanical joint cast iron fittings shall be installed in accordance with the manufacturer's recommendations as approved by the Engineer. n. Jointing Pipe Piping shall be laid and jointed in strict accordance with the manufacturer's recommendations as approved by the Engineer. The Contractor shall provide all special tools and devices such as special jacks, chokers, and similar items required for the installation. Lubricant for the pipe gaskets shall be furnished by the pipe manufacturer, and no substitutes will be permitted under any circumstances. o. Mechanical Couplings Before coupling, each pipe end shall be thoroughly cleaned of oil, scale, rust, and dirt for a distance of at least eight (8) incnes back from the end to provide a seat for the coupling gaskets. The pipe coating need not be removed if it presents a smooth surface and is securely bonded to the pipe. Couplings shall be installed in accordance with the manufacturer's instructions. Care shall be taken that the gaskets are wiped clean before they are installed. If necessary, they may be lubricated with soapy water for installation on the pipe ends. Coupling bolts shall be tightened progressively, drawing up bolts on opposite sides a little at a time until all bolts have a uniform tightness. p. Fitting Installation Fittings shall be installed at the locations shown on the Plans or as directed by the Engineer, or both. Fittings shall be handled, cleaned, patched, laid, and coupled in the manner hereinbefore specified for the handling, cleaning, patching. laying, and coupling of pipe. -3- ,. • q. Anchorage • (1) Limiting Pipe Diameter and Degree of Bend On all pipelines four inches in diameter or larger, all tees, plugs, caps, and bends exceeding 22 1/2 degrees and other locations where unbalanced forces exist shall be securely anchored by suitable thrust blocking as shown on the Plans or hereinafter specified. (2) Thrust Blocks Reaction or thrust blocks shall be placed as shown on the Plans. Blocking shall be placed between the undisturbed ground and the fitting to be anchored. The quantity of concrete and the area of bearing on the pipe shall be as shown on the Plans or directed by the Engineer. The blocking shall be so placed that, unless specifically shown otherwise on the Plans, the pipe and fitting joints will be accessible to repairs. r. Tests and Inspections (1) Test Specimens Test specimens in the amounts set forth. in the applicable ASTM Specifications shall be furnished the Owner at no charge. (2) Pipe Inspection Specimens for strength tests may be selected by the Engineer in accordance with the applicable ASTM Specifications ' from pipe in the pipe manufacturer's yard or at the point of delivery to the Contractor. The provisions of applicable ASTM Standards shall apply, except as modified herein, in regard to the number of tests made, the evaluation of such tests, and the rejection or acceptance of pipe. The Owner reserves the right to approve the testing agency, and the Engineer's evaluation of the results of such tests shall be final. (3) Hydrostatic Tests Pressure and leakage tests shall be made on all newly laid pipe or any valved section of it, or both. The Engineer will conduct the tests, but the Contractor shall furnish all necessary assistance, equipment, and material and shall make all taps in the pipe as required. ' The Contractor shall furnish the following equipment and materials for the tests: 2 5 gallon graduated containers 2 Pressure gnages 1 Hydraulic force pump similar and equal to Pacific H.T. 75 as manufactured by the Pacific~Pumping Company of Portland, Ore. Suitable hose and suction pipe as required. The tests shall be conducted after the trench has been backfilled or partially backfilled with the joints left exposed for inspection. Where any section of pipe is provided with concrete reaction blocking, the pressure test shall not be made until at least five days have elapsed after the concrete reaction blocking is installed. If high-early cement is used for the concrete thrust blocking, the time may be cut to two (2) days instead of the five previously specified. -4- • • • The pressure test shall be conducted in the following manner. After the pipe has been backfilled or partially backfilled as hereinbefore specified, the. pipe shall be filled with water. The test pressure shall be one and one-half (1 1/2) times the normal static pressure but not less than seventy-five (75) pounds per square inch. (a) Duration The duration of each pressure test shall be thirty (30) minutes. (b) Expelling Air Before applying the specified test pressure, all air shall be expelled from the pipe. (e) Procedure Each valved section of pipe shall be slowly filled with water to replace any lost; and the specified test pressure, measured at the point of lowest elevation, shall be applied by means of a pump connected to the, pipe in a saitsfactory manner. The pump shall then be valved off, and the pressure shall be held in the line for the test period. At the end of the test period, the pump shall be operated until the test pressure is again attained. The pump suction shall be in a bucket, barrel, or similar device, or through a meter so that the amount of water required to restore the test pressure may be measured accurately. s. Leakage- Leakage shall be defined as the quantity of water necessary to restore the specified test pressure at the end of the test period. No pipe installation will be accepted until the leakage is less than the number of gallons per hour as determined by the formula following: L ~ ~ (P)1/2 5500 in which L ~ allowable leakage in gallons per hour N ~ number of joints in the length of pipe tested D nominal diameter of pipe in inches ~P m average .test pressure during the leakage test in pounds per square inch Should any test of pipe laid disclose leakage greater than that allowed above, the Contractor shall, at his own expense, locate and repair the defective joints or pipe until the leakage is within the specified allowance. t. Sterilization Sterilization of new lines shall be completed by the Contractor prior to connection to the existing system in accordance with the Standard for Disinfecting Watermains prepared by the American Water Works Association (AWWA C601, Latest Revision) B. FIRE HYDRANT AND AUXILIARY VALVE 1. Scope This section covers the work necessary for the fire hydrants and auxiliary valves, including but not limited to furnishing the fire hydrants, auxiliary valves, auxiliary valve boxes, and appurtenances; excavation and backfill; installing the fire hydrants, auxiliary valves, auxiliary valve boxes, and appurtenances; and all incidental and related work. S- ` ~ • 2. Materials a. Fire Hydrants All fire hydrants shall be standard AWWA specifi- cation fire hydrants, for four (4) foot setting, with minimum four and one-~ half (4 1/2) inch diameter valve opening; 175 psi working pressure; two' (2), two and one-half (2 1/2) inch fire hose outlet nozzles, valve operator to open to the left; a breakable traffic flange just above ground level; a drain which automatically opens when the hydrant is closed; and a six (6) inch diameter flange at the bottom which connects to the auxiliary gate valve. b. Auxiliary Valves Auxiliary gate valves shall conform to the applicable requirements of Section 1.01-C of these Specifications. Auxiliary gate valves shall be six (6) inch, nonrising stem with standard square two (2) inch operating nut and shall open counter-clockwise. The valve shall be flanged on one end to fit the flanged .inlet to the fire hydrant, and the opposite end sall be furnished for mechanical joint to fit the six (6) inch supply pipe. ^ c. Valve Box 'The valve boxes for the auxiliary valves shall conform to the requirements of Section 1.01-C of these Specifications. 3. .Workmanship a. Location Hydrants shall be located as shown on the Plans or as directed by the Engineer in.a manner to provide complete accessibility and to minimize the possibility of damage from vehicles or injury to pedestrians. b.. Position Ali hydrants shall be installed plumb and shall have. their nozzles parallel with or at right angles to the curb with the pumper nozzle facing the curb, except that hydrants having two hose. nozzles 90 degrees apart shall be set with each nozzle facing the curb at an angle of 45 degrees. Hydrants shall be set to the established grade with nozzles twelve (12) inches above the ground as shown on the Plans or as directed by the Engineer. c. Connection to Main Each hydrant shall be connected to the main with a six (6) inch cast iron branch controlled by an independent six (6) inch gate valve, unless otherwise specified. d. Hydrant Drainage Hydrant drainage shall be provided at the base of the hydrant by placing gravel or crushed stone from the bottom of the trench to at least six (6) inches above the waste opening in the hydrant and to a distance of one (1) foot around the elbow. No drainage system shall be connected to a sewer. The fire hydrants shall be set upon a stable granular material or a concrete base at least twelve (12) inches square by four (4) inches deep:. e. Anchorage of Hydrants The bowl of each hydrant shall be well braced against unexcavated earth at the end of the trench with stone slabs or concrete blocking as shown on the Plans or directed by the Engineer. -6- • • C. GATE VALVES 1. Sco a This section covers the work necessary for the cast iron gate valves and valve boxes including but not limited to furnishing the cast iron gate valves, valve boxes, and appurtenances; excavation.-and backfill;~ installing the cast iron gate valves, valve boxes, and appurtenances; and all incidental and related work. 2. Materials a. Gate Valves All valves shall be standard AWWA Specification gate valves, 115 psi water working pressure, double bronze mounted, non-rising stem, with 0-ring rubber gasket, and with a two (2) inch square operating nut, opening to the left. Unless otherwise indicated on the drawings, valves shall have mechanical joint ends. Valves shall be complete with cast iron bolts, nuts, rubber gaskets, and cast iron follower glands. b. Valve Boxes All gate valves shall be fitted with a standard adjustable cast iron valve box and lid. 3. Workmanship a. General Valves shall be set and jointed to the pipe in the manner specified in Section 1.O1,A,3 of the Specifications A valve box shall be provided for every valve that is to be buried in the ground. The valve box shall not transmit shock or stress to the valve. and shall be centered and plumb over the wrench nut of the valve with the box cover flush with the surrounding surface, or at such other level as may be directed, by the Engineer. b. Location Valves shall be located as shown on the Plans or as field located by the Engineer during construction. D. WATER SERVICE CONNECTIONS 1. Sco a This item covers the work necessary for the water service connections at existing locations, including but not limited to furnishing all materials, excavation and backfill; installation of corporation stop valves; water service connection pipeline and fittings; and all incidental and related work. 2. Materials a. Corporation Stop Corporation stop valves shall be of the size re- quired to match the water service connection pipe as hereinafter specified. b. Water Service Connection Pipe Water service connection pipe shall be copper or Class 160 PVC. Water service pipe shall be one (1) inch I.D. if only one fourplex will be served and one and one half ( 1-1/2) inch I.D. if two fourplexes will be served. c. Curb Stop Curb stop shall be one (1) inch Meuller Mark II Oriseal No. H-10283 or approved equal. d. Meter Yoke Meter yoke shall be Ford V94-24 with male connection or approved equal. - 7- ,, r •. • e. Service Stub On all meter installations where service cannot be completed to the building, an eighteen (18) inch by one (1) inch galvanized or copper stub with plug shall be attached to the discharge side of the meter yoke. 3. Workmanship a. General Water service connections shall be installed as illustrated on the accompanying J-U-B ENGINEERS, Inc., Drawing No. B741115 subject. to any further requirements as specified herein. The City of Meridian shall furnish and install the meters. All work under this item shall be subject to inspec- tion by the Meridian City Work Superintendent. -8-