(A) Pipe sizing.
(1) (a) Public water main installation of pipe smaller than 6 inches is not standard and will only be allowed when directed by the city engineer in very unusual circumstances.
(b) The minimum standards for water distribution pipe sizing is as follows:
Street Classification | Size |
Local street | 8 inch |
Collector | 12 inch |
Parkway and arterials or section line streets | 16 inch or as directed by the city engineer |
(2) Mains designed as single feed systems with more than one fire hydrant shall be minimum of 8 inches diameter. An 8-inch diameter main configured as a looped system with two feeds can serve up to 6 fire hydrants.
(3) A 6-inch diameter single feed system water main is permitted only in cul-de-sacs of 350 feet or less with a maximum of 1 hydrant.
(B) Pipe material.
(1) All pipe for water lines up to and including 16-inch diameter, shall be minimum Class 50 ductile iron pipe (DIP) which meets all applicable standards and specifications. Material for pipes larger than 16 inches shall be approved by the AWC or WUFCD prior to construction.
(2) All fittings shall be ductile iron or AWC or WUFCD approved equal.
(3) Pipe shall meet all applicable AWWA C-400 standards and specifications, including the Underwriters Laboratories (“UL”), Inc.
(4) Lot testing, per AWWA C-400, may be required at the discretion of the WUCFD district engineer or an AWC representative. Testing shall be performed at an independent testing lab, approved by the AWC or WUFCD (cost of testing to be paid by supplier or contractor). Certifications and test results, for each lot to be used, shall be delivered to the AWC or WUFCD inspector prior to delivery of pipe to the job site.
(5) When necessary, restrained joints shall be in accordance with MAG Standard Details 302-1 and 302-2. EBBA Iron “Megalugs” are the acceptable standard for restraints.
(C) Pipe locations.
(1) As a minimum, water mains shall be installed along the frontage of the property being developed, when it is adjacent to public ROW or public utility and facilities easements. The main will be extended from the ending point of the existing water main across the entire frontage of the property needing the water, at the property owner’s expense. As expressed elsewhere in this article, water mains may require looping (feeds from two sources) to create adequate flows.
(2) A 6-foot minimum horizontal separation from any parallel underground utility is required. In all major streets and other active utility corridors, a utility conflict review will be required by the city engineer.
(D) Back/low preventions.
(1) AWC or WUFCD is responsible for protecting the quality of the public water supply. To prevent contamination of the public water supply by backflow and cross-connections, the AWC or WUFCD shall identify premises requiring backflow prevention and approved types of assemblies to prevent backflow.
(2) All required backflow prevention assemblies shall be owned and maintained by the property owner.
(3) All backflow prevention assemblies shall be tested upon installation and annually thereafter by a certified tester and results of that test forwarded to AWC or WUFCD.
(4) All services 2 inches and larger shall require backflow protection. All master metered residential, all commercial and all industrial services shall require backflow prevention. In some cases smaller services not in one of the preceding categories may require backflow protection as determined by the AWC or WUFCD. All unmetered fire systems shall be equipped with backflow prevention assemblies supplied with a metered detector loop.
(5) All above-ground backflow prevention assemblies 3 inches and larger shall be painted a neutral (earth tone) color to blend in with its surroundings.
(6) All above-ground backflow prevention assemblies smaller than 3 inches shall be placed in protective cages painted a neutral (earth tone) color to blend in with its surroundings.
(7) Backflow prevention assemblies shall be located outside of public right-of-way on private property.
(E) Water services.
(1) All water services 2 inches in diameter and smaller shall be Type K copper tubing. Large copper tubing shall be handled so that kinks do not develop, thus causing a water restriction.
(2) All brass service fittings shall be Ford or Mueller unless otherwise approved by the city engineer. Corporation stops, curb stops and angle stops shall include a ball style valve.
(3) All service line fittings on services 2 inches and smaller shall be compression style (Ford Quick Joint, Mueller 110 or approved equal), with the exception of corporation stop to saddle and angle stop to meter, which shall be threaded. No soldered joints will be allowed below ground.
(4) Corporation stops at the main shall be secured with brass or epoxy coated double strap saddles. No direct tapping of main lines for corporation stops will be allowed. Corporation stops shall be male iron pipe thread (“MIPT”) inlet and compression style outlet.
(5) Services using corporation stops at the main shall be tapped at approximately the 10:00 o’clock or 2:00 o’clock position on the main. Services tapped at 12:00 o’clock (straight up) shall be used for air release valves. Regular service taps at the 12:00 o’clock position shall be used when other tap locations are not an option and only with approval from the city engineer.
(6) Water services larger than 2 inches on a pressurized water main shall be installed per MAG Standard Detail 340. Live (wet) taps of water mains shall be coordinated with the AWC or WUFCD inspector. Tapping tees (sleeves) shall pass a pressure test at a minimum 200 psi for 60 minutes before the actual tap is made.
(7) Pressure reducing valves are required to be installed on the customer side of the water meter, where the static pressure exceeds 99 psi. Maintenance of the pressure-reducing valve shall be the customer’s responsibility.
(8) The developer is responsible for the installation of all necessary water services for the development.
(9) Meter boxes for services 2 inches and smaller shall be multi-layer plastic with a vertical load rating of 25,000 pounds minimum (Mid States Plastics, Inc. BCF Series or approved equal). Boxes shall have vertical sides for ease of adjusting. Boxes shall have a rigid flange molded in the top of the box to hold its shape and provide support in concrete or asphalt or soft or sandy soil. Cover shall be ductile iron with hinged meter reading lid.
(10) Meter boxes for services 2 inches and smaller in traffic areas shall be concrete. Under certain circumstances the above stated plastic boxes may be used with specific approval of the AWC or WUFCD. Covers in traffic areas shall be welded steel.
(11) The developer shall size water services to properly serve the proposed project being constructed. Service sizes shall be plainly indicated on the plans submitted. Proposed water service sizes shall be reviewed and approved by the AWC or WUFCD.
(12) Single water services shall not serve properties under separate ownership without the written approval of the city engineer.
(13) The developer’s contractor shall install the water meter vault and provide the meter for all services over 2 inches. Vaults shall have full opening aluminum covers with spring assist. Vaults shall be installed per MAG Standard Detail 321 and include the service inlet and outlet piping. Water meters and other equipment shall be installed using clearances and other details found in MAG Standard Details 3451 and 345-2. Detailed drawings or manufacturer’s literature with lid and door dimensions shall be presented to the city engineer for approval before installation.
(14) Services will be turned on by AWC or WUCFD personnel only. It is unlawful for anyone other than an employee for the AWC or WUFCD or someone under his or her direct supervision to operate valves that will activate water services. Water services will only be turned on after a responsible individual has completed all appropriate paper work to open an account and all applicable fees have been paid.
(F) Water meters.
(1) The AWC or WUFCD provides and installs all meters for services 2 inches and smaller at the owner’s or developer’s expense. Meters for services larger than 2 inches shall be supplied by the owner/developer. Meters 2 inches and smaller shall be Precision brand, model PMM, or District-approved equal, with electronic ECR register and “Touch Read” meter reading system. Under certain circumstances, 2-inch services may require compound meters. Meters for domestic use larger than 2 inches shall be Sensus compound or Metron single jet meters as directed by the AWC or WUFCD, with electronic ECR register and “Touch Read” meter reading system or AWC or WUFCD-approved equal. Any domestic service 2 inches or larger shall require backflow protection behind the meter. All master metered residential services shall require backflow prevention.
(2) Meters used for a system that is a combination of domestic use and fire protection shall be Sensus Compact FireLine assemblies or approved equal with ball valves and test ports. All iron parts on meter shall be epoxy coated inside and out. Combination service shall require backflow protection behind the meter.
(3) Large meters, on potable lines not combined with fire systems, 3 inches and larger shall be installed with a minimum 2-inch bypass with valves to allow a continued water source should the meter need to be repaired or replaced.
(4) The architect, engineer or applicant shall include the projected water flow rate requirements for the proposed water services on the project on the plans. Care should be taken in sizing meters and services to sufficiently supply the needs. The AWC or WUCFD will review the information provided on plans and specifications and make the final determination of meter size requirements.
(5) Temporary fire hydrant meters are required in obtaining construction water and can be ordered from the AWC or WUFCD.
(G) Fire hydrants.
(1) Fire hydrants in the public rights-of-way or public properties shall be installed per MAG Standard Details 360 and 362.
(2) The normal location of fire hydrants is the northeast corner of street intersections. Mid-block fire hydrants shall be placed on the same side of the street as the water main line whenever practical.
(3) All fire hydrants installed in the system shall be connected to the water main with a minimum 6-inch water line connection and have a minimum 6-inch main valve.
(4) Maximum spacing for fire hydrants in general is 500 feet. Superstition Fire and Medical
District (“SFMD”) has final approval for hydrant spacing and flow requirements.
(5) All fire hydrants shall be set to blue top hub per MAG Standard Specification 756.3. There shall be a minimum of 18 inches of clearance from the lowest nozzle to finish grade.
(6) A minimum clear distance of 3 feet from the centerline of the fire hydrant is required.
(7) Fire hydrant outlets shall have National Standard Threads. Fire hydrants approved for installation on AWC or WUFCD water mains are:
(a) Kennedy - Guardian;
(b) Mueller - Super Centurian;
(c) Waterous - Pacer; and
(d) Clow - Medallion.
(H) Valve standards, spacing and location.
(1) Twelve-inch and smaller:
(a) Maximum of 600-foot spacing in industrial/commercial districts;
(b) Maximum of 800-foot spacing in residential areas;
(c) Maximum of 30 single-family units or 5 valves per shutdown;
(d) One valve on each side of major crossing, such as canals, railroads, freeways and the like; and
(e) One gate valve between main and each fire hydrant.
(2) Sixteen-inch and larger: maximum of 1,000-foot spacing.
(3) Epoxy coated, resilient seated gate valves are required on water mains 12 inches in diameter or smaller. All gate valves shall conform to Section 630.3 of the MAG Uniform Standard Specifications. All valves must meet or exceed AWWA C-509 or C-515 standards.
(4) Sixteen-inch mains may have either gate or butterfly valves depending on the application. Final determination with regard to which valve shall be used shall be decided by the city engineer. Valves must conform to Sections 630.3 and 630.5 of the MAG Uniform Standard Specifications respectively. Gate valves shall also meet or exceed AWWA C-509 or C-515 standards.
(5) Butterfly valves or approved equal are required on water mains larger than 16 inches in diameter. All butterfly valves shall conform to Section 630.5(A) of the MAG Uniform Standard Specifications.
(6) Butterfly valve manual operators shall be furnished with ground level position indicators. Position indicators shall attach to the extension stem and shall indicate the relative positions, which direction to turn the operator to open and close the valve, and how many turns to close the valve from the fully open position.
(7) Certified shop drawings shall be submitted to the city engineer for review and approval prior to shipment of the butterfly valves.
(8) Tapping sleeves and valves are to conform to Section 630.4 of the MAG Uniform Standard Specifications and be installed per MAG Standard Detail 340. All wet taps shall be performed by a contractor approved by AWC or WUCFD.
(9) All valve boxes and covers shall be installed per MAG Standard Detail 391-1, Type “A.” All valve boxes used by the AWC or WUCFD shall be manufactured for that specific purpose. No PVC pipe or other “field designed” boxes will be allowed.
(10) Pressure reducing and pressure sustaining valve stations shall be of a 2-stage design; i.e., a valve for normal and high flows, and a valve for low flows. Valves shall be installed in a vault of an approved design behind the sidewalk. Valves and vault shall be reviewed and approved by the city engineer prior to ordering.
(11) Approved air vacuum release devices shall be installed on all water mains 12 inches or larger in diameter at locations where the slope changes from positive to negative, and vice versa. Air release devices may also be required on mains smaller than 12 inches as determined by the city engineer.
(12) Water line valves shall meet or exceed the pressure classification of the water line. Valve pressure rating should be noted on the plans.
(I) Easement width.
(1) Six-inch and 8-inch water: 20-foot minimum;
(2) Twelve-inch water main: 20-foot minimum; and
(3) Over 12-inch: Width based on design conditions.
(4) Additional easement width may be required by the city engineer if, in his or her opinion, excessive laying depth of the pipe would require the additional width for maintenance purposes.
(J) Installation depth. Water mains shall be installed to minimum depth measured from finished grade to top of pipe as follows:
Size | Minimum Depth |
8-inch and smaller | 36 inches |
12-inch and 16-inch | 48 inches |
16-inch and smaller in major streets | 48 inches |
20-inch and larger | Special design |
(K) Water construction requirements.
(1) All water main design shall take into consideration the Water Construction Notes, set forth in Apache Junction City Code Vol. II, § 10-2-15.
(2) The engineer and the contractor shall verify the stationing, elevations and type of pipe to be matched at all field closure points.
(3) The contractor shall contact “Blue Stake” 5 working days prior to construction.
(4) The contractor shall pothole all existing utilities ahead of his or her construction to allow for any necessary adjustments to the grade line.
(5) No other utilities shall be installed in the same trench as the water main.
(6) Vertical realignment by means of pipe deflection shall not exceed ½ the pipe manufacturer’s recommendation. Deflection angle information shall be given on the plans. Vertical realignment by means of bends and offsets shall be per MAG Standard Detail 370 for water mains 6 inches to 12 inches in diameter. Water mains larger than 12 inches shall have vertical realignment detailed by the engineer.
(7) One joint of pipe (ten feet minimum) shall be installed on all stubs after valve installation.
(8) All fittings and hydrants requiring thrust blocking (kickers) shall be wrapped in a minimum of 2 layers of 6 mil plastic sheeting, and care shall be taken to keep concrete separate from bolts, barrel drains, followers and the like.
(9) All new water mains shall be disinfected and flushed following AWWA Standard C 651-99.
(10) It is policy to require the use of a fire hydrant meter by the contractor to obtain construction water. New water line shall be filled through the hydrant meter unless an alternate method is approved by the city engineer. The contractor shall obtain a fire hydrant meter from the AWC or WUFCD and pay all fees and water bills. If the use of a fire hydrant meter is not possible, the AWC or WUFCD inspector will tabulate the number of times the water line is filled and estimate the amount of water used and the contractor will be charged accordingly.
(L) Reclaimed water. All reclaimed water lines shall be designed and installed per M.A.G. Standard Details listed under M.A.G. Specifications Section 616.
(Ord. passed - - )