Pace_Water_Specifications.pdf

UTILITY DESIGN MANUAL

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SECTION 2 – POTABLE WATER SYSTEM

2.1 GENERAL REQUIREMENTS AND DESIGN STANDARDS

A. General

The following minimum requirements are considered acceptable to PWS in the distribution of water for domestic consumption and fire protection.

Deviations from these standards may be allowed on a case by case basis. If the deviation is in accordance with sound engineering practice and will not create a problem for the system (PWS), the deviation may be approved. No deviation will be allowed unless it is clearly noted on the approved construction plans.

When these standards differ from county, state and/or federal requirement, the more stringent requirement shall apply.

The distribution system of a waterworks includes the mains, valves, hydrants, consumer service pipes and meters, and other appurtenances. The system should be designed to provide an adequate supply of water to the consumers and for fire protection at all times.

B. Standards

1. NSF Standards

Materials and methods of construction shall comply with the latest published editions of the

National Sanitation Foundation (NSF) Standard 61.

2. ASME/ANSI Standards

American Society of Mechanical Engineers (ASME) and the American National Standards

Institute (ANSI) Standards.

B16.20 Metallic Gaskets for Pipe Flanges: Ring-Joint, Spiral-Wound, and Jacketed

B16.1 Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250

B 1.1 Unified Inch Screw Threads, UN and UNR Thread Form

B 1.20.1 Pipe Threads, General Purpose (Inch)

B 1.20.3 Dryseal Pipe Threads (Inch)

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3. ASTM Standards

American Society for Testing and Materials (ASTM) Standards.

A126 Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe Fittings

A48 Standard Specification for Gray Iron Castings

B584 Standard Specification for Copper Alloy Sand Castings for General Applications

B62 Standard Specification for Composition Bronze or Ounce Metal Castings

B88 Standard Specification for Seamless Copper Water Tube

D1248 Standard Specification for Polyethylene Plastics Extrusion Materials for Wire and

Cable

D1598 Standard Test Method for Time-to Failure of Plastic Pipe Under Constant Internal

Pressure

D1599 Standard Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic

Pipe, Tubing, and Fittings

D1693 Standard Test Method for Environmental Stress-Cracking of Ethylene Plastics

D2241 Standard Specification for Poly (Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR

Series)

D2737 Standard Specification for Polyethylene (PE) Plastic Tubing

D3350 Standard Specification for Polyethylene Plastics Pipe and Fittings Materials

D429 Standard Test Methods for Rubber Property-Adhesion to Rigid Substrates

F477 Standards Specification for Elastomeric Seals (Gaskets) for Joining Plastic Pipe

4. Environmental Protection Agency and U.S. Public Health Service

The governing standards of these agencies will be followed when applicable.

5. Florida Department of Environmental Protection

The water distribution system shall conform to the applicable Florida Department of

Environmental Protection laws, policies, standards, and rules and regulations for public water systems. The State of Florida has adopted in its entirety the Recommended Standards for

Water Facilities (10 State Standards). All work shall therefore comply with 10 State

Standards.

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6. Plumbing Codes

The provisions of the Florida Building Code as it pertains to water supply and distribution, service line locations and materials, and backflow prevention devices, except as provided for elsewhere in these criteria, shall apply.

7. AWWA Standards

American Water Works Association (AWWA) Standards.

C104 Cement Mortar Lining for Ductile Iron Pipe and Fittings

C105 Polyethylene Encasement for Ductile-Iron Pipe Systems

C110 Ductile-Iron and Gray-Iron Fittings

C111 Rubber Gasket Joints for Ductile Iron Pressure Pipe and Fittings

C151 Ductile Iron Pipe, Centrifugally Cast

C153 Ductile Iron Compact Fittings, For Water Service

C213 Fusion-Bonded Epoxy Coating for the Interior and Exterior of Steel Water Pipelines

C301 Prestressed Concrete Cylinder Pressure Pipe (PCCP), 16-in. and Larger

C502 Dry Barrel Fire Hydrants

C504 Rubber Seated Butterfly Valves 3-in. (75 mm) Through 72-in. (1,800 mm)

C509 Resilient Seated Gate Valves For Water Supply Service

C510 Double Check Valve Backflow Prevention Assembly

C511 Reduced-Pressure Principle Backflow Prevention Assembly

C515 Reduced-Wall, Resilient Seated Gate Valves For Water Supply Service

C550 Protective Interior Coatings for Valves and Hydrants

C600 Installation of Ductile Iron Water Mains & Their Appurtenances

C605 Underground Installation of Polyvinyl Chloride (PVC) And Molecularly Oriented

Polyvinyl Chloride (PVCO) Pressure Pipe and Fittings

C651 Disinfecting Water Mains

C800 Underground Service Line Valves and Fittings

C900 PVC Pipe And Fabricated Fittings, 4-in. Through 12-in. (100 mm through 300 mm), For Water Transmission And Distribution

C901 Polyethylene (PE) Pressure Pipe and Tubing 1/2-in. (13mm) through 3-in. (76 mm), For Water Service

C906 Polyethylene (PE) Pressure Pipe & Fittings, 4-in. (100 mm) through 63-in. (1600

mm) for Water Distribution And Transmission

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8. Pace Water System, Inc.

All water distribution systems that are to become a part of PWS shall be designed and constructed in accordance with these standards. Materials, installation, and construction methods and procedures shall be in accordance with this manual.

C. Location/Future Connection

Water mains shall be located in dedicated right-of-ways or dedicated PWS utility easements.

When installed in right-of-ways, water mains shall, in general, maintain a consistent alignment with respect to the centerline of the road. All water mains located outside of dedicated right-of-ways shall require a minimum 20-foot easement. Additional easement widths shall be provided when the pipe size or depth of cover so dictate. If a water main is located adjacent to a road right-of-way, a minimum 10-foot easement shall be provided. Additional easement widths shall be provided if the pipe size or depth of cover so dictate. Water mains shall not be placed under any structures. In general, water mains shall not be located along side or rear lot lines.

Placement of a water main along side or rear lot line may be allowed on a case by case basis if such a water main configuration results in efficient placement and utilization of the water main network.

Provisions for future connecting mains shall be made by extending construction of all water mains to the exterior boundaries of the subdivision wherever future connections to adjacent subdivisions or lots are anticipated or are required to form an interconnected grid system or reduce the number of dead ends.

D. Design Basis

1. Pressures

The system shall be designed to maintain a minimum pressure of 20 psi at all points in the distribution system under all conditions of flow. The normal working pressure in the distribution system should be approximately 60 psi but not less than 35 psi on the downstream side of a meter. Higher pressures may be required at commercial, industrial and high density residential areas.

2. Diameter of Mains

Only water mains of six (6) inch diameter and larger shall be permitted. At a minimum, six

(6) inch looped systems shall be required in low density residential projects. In commercial, industrial, and high density residential areas, minimum eight (8) inch looped mains may be required. Larger size mains may be required if necessary to allow the withdrawal of the required fire flow while maintaining the minimum residual pressure. When extending water

2-5 mains in areas where smaller diameters exist, the diameter of the extension may match that of the existing main as approved by PWS.

3. Fire Flow Requirements

Fire flow requirements shall be determined in accordance with State Insurance Services

Office and/or Santa Rosa County Regulations. Fire flow is not guaranteed by PWS. Fire flow testing shall be determined by a third party in coordination with PWS at no expense to

PWS.

4. Fire Hydrant Location and Spacing

Fire hydrants shall be located along public right-of-ways preferably at street intersections and at property corners. A 6-inch gate valve shall be installed between the water main and each fire hydrant. Fire hydrants shall be the dry barrel, breakaway traffic type. Fire hydrants shall be spaced every 1000 ft. along right-of-ways and located throughout the distribution system so that no more than 500 ft. of hose, laid along public right-of-ways, will be required to reach from a fire hydrant to any proposed structure within the area served. Hydrant spacing in commercial areas shall be at 500 ft. intervals. Where dead ends occur, a fire hydrant or flush hydrant shall be placed at the dead end point. Approved dead end lines extended from existing mains less than 6 inches in diameter will require a flush hydrant. Fire hydrants or flush hydrants shall not be located in proximity to power transformers and shall avoid power pedestals when possible. In the event a development occurs near an existing hydrant installation, the hydrant shall be extended and/or re-set to accommodate any change in grade.

Hydrant extensions shall be sized to the nearest 6 inch increment. If applicable, hydrant shall be placed at high points in design to avoid air lock.

5. Dead Ends

In order to provide increased reliability of service and reduce head loss, dead ends shall be minimized by making appropriate tie-ins by looping the network whenever practical, as determined by PWS.

Where dead-end mains occur, they shall be provided with a fire hydrant or approved flushing hydrant. Extended water mains for the sole purpose of future connection may utilize a flushing hydrant upon approval of PWS. Flushing devices shall be sized to provide flows which will give a velocity of at least 2.5 feet per second in the water main being flushed. No flushing device shall be directly connected to any sewer.

6. Valves

Sufficient valves shall be provided on water mains so that inconvenience and sanitary hazards will be minimized during repairs. Valves should be located at not more than 500 ft.

intervals in commercial, industrial and high density residential areas and at not more than

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1000 ft. intervals in all other areas. Appropriate valving shall also be provided at all areas where water mains intersect to ensure effective isolation of water lines for repair, maintenance or future extension. In-line valves shall be located at property corners to avoid future driveways. Valves shall not be placed in roadway or sidewalk on proposed developments.

Valve locations shall be marked with a “V” cut into the curb and painted blue.

7. Crossings and Separation Distances

a. Aerial or Underwater Crossings

Aerial crossings shall be avoided whenever possible. Underwater/stream crossings shall be performed by directional drilling. PWS should be consulted before final plans are prepared.

1. Above-water Crossings

The pipe shall be adequately supported and anchored, protected from vandalism, damage and freezing, and accessible for repair or replacement.

2. Underwater Crossings

A minimum cover of five feet shall be provided over the pipe. When crossing water courses which are greater than 15 feet in width, the following shall be provided:

▪ The pipe shall be of special construction, having flexible, restrained or welded watertight joints.

▪ Valves shall be provided at both ends of water crossings so that the section can be isolated for testing or repair; the valves shall be easily accessible, and not subject to flooding.

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▪ Permanent taps or other provisions to all insertion of a small meter to determine leakage and obtain water samples shall be made on each side of the valve closest to the supply source.

b. Sewer Crossings

Water mains crossing sewers shall be laid to provide a minimum vertical distance of 18 inches between the outside of the water main and the outside of the sewer. This shall be the case where the water main is either above or below the sewer with preference to the water main located above the sewer. At crossings, one full length of water pipe shall be located so both joints will be as far from the sewer as possible. Special structural support for the water and sewer pipes may be required.

c. Parallel Installation

Water mains shall be laid at least 6 feet horizontally from any existing or proposed gravity sewer or forcemain and shall be laid at least 3 feet horizontally from any existing or proposed reclaimed water main. The distance shall be measured edge to edge.

8. Air Relief

At high points in water mains where air can accumulate, provisions shall be made to remove the air by means of hydrants or automatic air relief valves. Automatic air relief valves shall not be used in situations where flooding of the valve box may occur.

9. Water Services

a. Customer Service Lines

Customer service lines shall be provided to all lots and grassed/landscaped medians within a subdivision. Customer service connections to industrial or commercial lots may be omitted provided approval of PWS is obtained prior to approval of plans and specifications. All meters shall be adjacent to the property line and readily accessible to PWS personnel.

Customer service lines shall be limited to 55 ft. in length and be perpendicular to water main.

In areas where the right-of-way is wider than 60 ft., the developer shall provide a water main on each side of the right-of-way.

Water services shall not be located in proximity to power transformers and shall avoid power pedestals when possible. All new service lines must be cased under paved areas and sidewalk. Water service locations shall be marked with a “W” cut into the curb and painted blue.

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b. Master Metering

In general individual water meters shall be installed for all users. Under certain conditions master metering may be allowed for shopping centers, malls and similar installations.

c. Meter Installations

All residential meters will be installed by PWS after payment of applicable fees and charges.

All commercial meters shall be installed by Contractor (after payment of applicable fees and charges), PWS will provide meter. The service tap, corp stop, tubing, curb stop and meter box shall be installed by the contractor prior to installation of meter for commercial sites and new subdivisions.

All meters less than two inches in size will be installed underground in an approved meter box. Meters two inches and larger shall be installed below ground by the contractor in a fiberglass or concrete vault. In commercial applications, meters larger than two inches shall be located in a meter easement located adjacent to the public right-of-way.

Size of all meters shall be determined by the developer’s engineer and approved by PWS.

The developer’s engineer shall provide sufficient information on estimated peak flows and low flows so that meter size can be verified. The developer’s engineer shall include headloss through metering device when designing the water system.

d. Cross Connection Control

In accordance with the PWS Cross Connection Control Program, Attachment D, backflow prevention devices shall be installed to protect public water supplies from contamination or pollution by isolating such contaminants or pollutants which could backflow into the public water system.

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The selection of an appropriate protective device will be based on the degree of hazard involved and will normally be as described hereinafter. However, PWS shall retain the final decision in individual cases.

The backflow prevention device shall be provided, installed, and maintained by the customer for all commercial and select residential connections. Testing shall be performed by an

AWWA or ABPA certified backflow tester approved by PWS.

PWS will provide and install a dual check valve assembly for single family residential connections.

Reduced Pressure Principle Backflow Prevention Device: Will be used in any high risk installation and all commercial installations or any installation with a secondary water source.

Double Detector Check Valve Assembly: Will be used in all private fire water supply systems. PWS will change out meter on DCDA assembly.

2.2 GUIDELINES AND TECHNICAL SPECIFICATIONS

A. Pipework

This section includes furnishing and installing all potable water pipework and appurtenances necessary for a fully operable water system.

1. Materials

All material shall be free from defects impairing strength and durability and be of the best commercial quality for the purpose specified. It shall have structural properties sufficient to safely sustain or withstand strains and stresses to which is normally subjected and be true to detail.

Certified records of material tests made by the manufacturer or by a reliable commercial laboratory shall be submitted to the Engineer.

All pipework will be inspected upon delivery and such as does not conform to the requirements of these specifications shall be rejected and must be immediately removed from the site by the Contractor. The Contractor shall furnish and provide all labor necessary to assist the Engineer in inspecting the material.

The basis of rejection shall be as specified in applicable AWWA and ASTM Specifications.

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2. Unplasticized Polyvinyl Chloride (PVC) Pressure Pipe

PVC pipe shall meet AWWA Standard C900-16 or ASTM Standard D-1785, with minimum designations per the table below. PVC pipe shall be provided with push-on joints with the bell integrally cast into the pipe. PVC pipe shall be installed with elastomeric gaskets meeting ASTM Standard F477.

Diameter

Required

Standard

DR

OD

2" - 3"

ASTM D-1785

Sch-40

IP

4" - 36"

C-900-16

DI

PVC pipe shall be as manufactured by the JM Eagle, National Pipe and Plastics, Inc., North

American Pipe Corporation, Vulcan Plastics Corporation, or approved equivalent. All potable water mains shall be blue in color.

All fittings for PVC pressure pipe shall be ductile iron mechanical joint meeting the requirements of ANSI/AWWA C153/A21.53-84 ductile iron compact fittings 3 inch through

12 inch for water and other liquids. Fittings for 2” pipe may be Sch-40.

The working pressure rating for fittings shall be 350 psi. Fittings shall be furnished with an asphaltic outside coating in accordance with ANSI/AWWA C153/A21.53 and cement lined and seal coated with an asphaltic material in accordance with ANSI/AWWA C104/A21.4.

Restraint lengths for PVC pipe vertical bends, horizontal bends and appurtenances shall be calculated using the Uni-Bell Handbook of PVC Pipe, Section 11.5.3.5. All valves shall be considered dead-ends for thrust restraint length calculations.

Standard laying lengths shall be 20 feet and randoms shall not be less than 10 feet.

Pipe must be certified as suitable for potable water use by the National Sanitation Foundation

(N.S.F.) and marked as follows: NSF-PW.

Each length of pipe shall be clearly marked with the following information at intervals of five feet or less:

▪ Nominal pipe size and OD base.

▪ Material code designation.

▪ Dimension ratio.

▪ Pressure class or pressure rating.

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▪ Manufacturer's name or trademark.

▪ NSF approval seal.

▪ Appropriate AWWA or ASTM standard number.

3. Ductile Iron Pipe (DIP)

Ductile iron pipe shall meet the requirements of ASTM A746. Pipe dimensions shall conform to ANSI/AWWA C151/A21.51, Pressure Class 250. Each pipe shall be conspicuously marked on the outside of the barrel to readily identify it from Cast-Iron. Metal thickness shall conform to ANSI/AWWA C150/A21.50-02.

a. Mechanical Joints: ANSI/AWWA Standard Specification A21.11, Rubber Gasket Joints for Ductile Iron Pressure Pipe and Fittings.

b. Push-on Joints: ANSI/AWWA Standard Specification A21.11, Rubber Gasket Joints for

Ductile Iron Pressure pipe and Fittings, Single gasket push-on type.

c. Restrained Joints: DIPRA Thrust Restraint Design for Ductile Iron Pipe shall be used to calculate required restrained joint lengths at all vertical bends, horizontal bends and appurtenances. All valves shall be considered dead-ends for restrained joint length calculations.

d. Flanged Joints: ANSI/AWWA Standard Specifications C115/A21.15-99, Ductile Iron

Pipe Flanges and Flanged Fittings. Screwed on flanges, faced and drilled to ANSI Class

125 pound template. The flanged joints shall be assembled by threading plain end pipe and screwing on long hub flanges. The connection shall then be power tightened and refaced across both face of flange and end of pipe. Provide one-sixteenth-inch ring gaskets of red sheet rubber meeting the requirements of Grade I, Table I of ASTM

Specification D1330-66, Sheet Rubber Gaskets. Connections shall be made with machine bolts and hexagonal nuts.

e. All fittings shall be ductile iron mechanical joint meeting the requirements of

ANSI/AWWA C153/A21.53 ductile iron compact fittings 2 inch through 48 inch for water and other liquids.

The working pressure rating for fittings shall be 350 psi. Fittings shall be furnished with an epoxy coating in accordance with ANSI/AWWA C116/A21.16 and cement lined and seal coated in accordance with ANSI/AWWA C104/A21.4.

Pipe must be certified as suitable for potable water use by the National Sanitation

Foundation (NSF) and marked as follows: NSF-PW.

f. Linings, Coatings and Hardware for Ductile Iron Pipe in Water Mains: All pipe, valves, fittings and specials for water shall be cement mortar lined, the lining shall comply with

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ANSI standard A21.4 (AWWA C104) "Cement-Mortar Lining for Ductile Iron Pipe and

Fittings for Water.” The exterior of buried pipe shall receive a zinc coating as specified in ISO 8179 at an application rate of 200 gm/square meter and coated with an outer protective coating prior to shipment. The exterior of all aboveground pipe shall receive a coat of rust inhibitor prime compatible with the finish paint schedule. Some pipe and fittings installed underground shall be encased in AWWA C105 V-Bio Polyethylene wrap, minimum 4 mils thickness.

4. Polyethylene Pipe (HDPE)

HDPE pipe 3-inch and larger shall comply or exceed AWWA C906, ASTM D2513, D3035, D3350, and D1248 latest revisions. Each manufacturer shall supply a letter of certification stating compliance to all the above standards and requirements prior to shipping any material to project site. All HDPE piping system components shall be the products of one manufacture. The HDPE material shall have required ultraviolet inhibitors to resist degradation by direct and prolong sunlight. The design of all HDPE materials shall be based on the hydrostatic design basis (HDB) of 1600 psi at 73.4°F. The cell classification shall be or exceed 345465C for all HDPE 3-inch and larger and shall be manufactured with 4710 resins only. The pipe shall be SDR 11 ductile iron pipe OD with a pressure rating of 200 psi.

All HDPE fittings shall comply with the same cell classification and pressure rating utilizing

4710 resins only.

All HDPE, 3-inch and larger, shall have 3 blue strips (1/4” wide) located at the 12, 4, and 8 o’clock positions with permanent ink along the entire length of the pipe with the wording size of pipe, SDR rating and pressure rating, manufacturer’s name, sewer pipe, ASTM

Standard F174, PE 4710, NSF, AWWA C906, and manufacturing date and location. This shall be at least ¼” tall lettering and shall run the entire length of the pipe. Print line markings shall include a production code from which the location and date of manufacture can be identified. Upon request, the manufacturer shall provide an explanation of his production code.

HDPE pipe /tubing 2-inch and smaller shall comply with or exceed AWWA C901, ASTM D-

3350, D-2737, D-1248, and D-2837 standards latest revisions. All HDPE tubing shall be manufactured with 4710 resins only and shall have NSF 14 certification. The cell classification shall be 445574E external pipe and 445574D for virgin center core. The pipe shall have UV stabilizers for direct sunlight protections, but all tubing shall be certified to resist direct sunlight such as Florida or Arizona for a minimum of 5 years with no visible or physical effect to the tubing. The manufacture shall issue certifications for all the above mention standards, cell classification, UV protection or a minimum of 5 years, and NSF 14 certification. All tubing shall be SDR 9 CTS pipe with a minimum pressure rating of 250 psi. The tubing shall be supplied with an outer layer of 4710 resins with green coloring while the inter core shall be a virgin clear center of 4710 resins. The tubing shall have a life time

2-13 warranty with certifications from the manufacture of compliance with purity of internal core and detailed outline of life time warranty.

a. Pipe and fittings shall be high-density polyethylene manufactured from NSF approved compound for PE 4710, or equal.

b. Pipe shall meet AWWA C-906, PE Pressure Pipe and Fittings 4” through 63” for Water

Distribution and Transmission and be marked with the NSF-PW logo. Pipe shall also comply or exceed ASTM D2513, D3035, D3350, and D1248 latest revisions.

Manufacturer shall supply a letter of certification stating compliance to all the above standards and requirements prior to shipping any material to project site.

c. Hydrostatic design stress (HDS) shall be calculated at 73.4F with a minimum pipe DR of 11 and operating pressure of 200 psi at 73.4F.

d. Pipe and fittings shall be produced by the same manufacturer from identical materials meeting the requirements of this specification.

e. Molded butt-type fittings shall meet the requirements of ASTM D-3261 and this specification. At the point of fusion, the outside diameter and minimum wall thickness of fitting butt fusion outlets shall meet the outside diameter and minimum wall thickness specifications of ASTM F-714 for the same size of pipe. Electrofusion-type fittings shall meet the requirements of ASTM F-1055.

f. Pipe shall be manufactured in accordance with ASTM F-714, ASTM D-3035, or the applicable dedicated service specification. Print line markings shall include a production code from which the location and date of manufacture can be identified. Upon request, the manufacturer shall provide an explanation of his production code.

g. Pipe Marking: HDPE bore pipe and fittings conveying sewer must be marked as prescribed by ASTM F714. Pipe markings will include nominal size, OD base (ie 12" ductile iron pipe sizing, DIPS), dimension ratio, pressure class, WPR, ASTM F714, manufacturer’s plant and extrusion line. Pipe shall be green in color, or shall be black with three coextruded green stripes for its full length at 120.

h. Butt fusion Fittings and HDPE fittings shall be PE 4710 HDPE, Cell Classification of PE

445574C as determined by ASTM D3350-05. Butt fusion fittings shall have a manufacturing standard of ASTM D3261. Molded and fabricated fittings shall have a pressure rating equal to the pipe unless otherwise specified in the plans. Fabricated fittings are to be manufactured using Data Loggers. Reference to the Data Logger Quality

Control records should be referenced from an indented stamp in each fusion bead of each fitting. Temperature, fusion pressure and a graphic representation of the fusion cycle shall be part of the Quality Control records. All fittings shall be within one DR of the

2-14 pipe’s specified DR to assure compatible fusion and to the pipe manufacturer’s recommendations.

i. Transition fittings terminate all HDPE pipe with fusion welded HDPE/PVC mechanical joint adapter with stainless steel stiffeners. Fittings shall have the same pressure rating as the pipe unless otherwise specified on the plans.

5. Metallic Tracer Wire

Copper wire (12 gauge) shall be buried directly above all non-metallic pipes no deeper than 18" below ground level. Color of tracer wire shall be blue for water. All connections are to be made with silicone sealed wire nuts. All stripped wire is to be inside the wire nut.

B. Valves, Hydrants, Meters and Miscellaneous Appurtenances

This section includes furnishing and installing complete all equipment and materials necessary for a complete and fully operable system.

safely sustain or withstand strains and stresses to which it is normally subjected and be true to detail.

All pipe work will be inspected upon delivery and such as does not conform to the assist the Engineer in inspecting the material.

The basis of rejection shall be as specified in applicable ASTM and AWWA Specifications.

2. Valves

a. Gate Valves

Provide gate valves meeting the following requirements.

Gate Valves Two Inches and Larger: Gate valves shall be of the resilient seated wedge type, epoxy coated to AWWA C550, cast iron body design. They shall comply with the AWWA

Gate Valve Standard C509 as latest revised. Valves shall be rated for zero leakage at 200 psi water working pressure and have a 400 psi hydrostatic test for structural soundness. All

2-15 testing shall be conducted in accordance with AWWA C509. Gate valves shall be mechanical joint per AWWA C111.

All cast iron shall conform to ASTM A126. Castings shall be clean and sound without defects that will impair their service. No plugging or welding of such defects will be allowed. Bolts shall be in accordance with ASTM A307.

Valves shall be M & H Model 4067, American Model 2500, Mueller A-2360 (Mueller A-

2361 for valves over 12”) or approved equivalent.

Gate Valves under Two Inches: Gate Valves under two inches shall be bronze body, threaded ends, non-rising stem, solid wedge disc and shall be American Model G300 or approved equivalent.

b. Air Release and Vacuum Valve

The combination air release and vacuum valve shall be furnished with both a large and small orifice and shall meet requirements specified in ANSI/AWWA C512. The valve shall automatically function to release to atmosphere both large and small amounts of air that accumulate in the pipeline. Once the air has been exhausted both the large and small valves shall seat tightly to prevent water leakage. The valve shall also function to admit air into a line, tank, or chamber under emergency conditions or when it is being drained. The valve body and cover shall be of semi-steel; floats of stainless steel; levers of bronze and resilient seats. The air and vacuum valve shall be manufactured by A.R.I. USA Inc. Model S-025 or

c. Valve Locations:

Valve locations shall be marked with a “V” cut into the curb and painted blue.

3. Hydrants

Fire Hydrants: All fire hydrants shall be 5-1/4 inch hydrants with two 2-1/2 inch connections and one pumper connection designed for 250 psi working pressure, and shall conform to the requirements of AWWA C502.

Hydrants shall have mechanical joint inlets, shall be for a 3-foot bury, and shall be breakaway or traffic model, dry barrel type.

All hydrant coatings shall meet or exceed the requirements of AWWA C-550. Exterior color shall be Fire Hydrant Red.

The hydrants shall be American Flow Control, American Darling B-84-B; Mueller Co., Super Centurion 250; M & H Style No. 129; or approved equivalent.

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4. Water Services

a. Meter Boxes

Meter boxes shall be furnished and installed by the Developer and shall be "Carson"

Standard Meter Box with pre-drilled solid lid to accept touch/radio read equipment, or

b. Meters

Meter sizes up to and including 1 1/2" shall be provided by PWS. Larger sized meters shall be purchased by the developer through PWS. All meters 2” and larger shall be installed in a fiberglass or concrete vault.

c. Service saddles

Service saddles shall meet requirements specified in AWWA C800 with an epoxy coated stainless steel band and shall be Ford Model FC202 or approved equivalent.

d. Corporation Stops

Corporation stops shall meet requirements specified in AWWA C800 and shall be Ford

Model No. F-1000 or approved equivalent. Inlets shall have CC threads and outlets shall have compression connections.

e. Curb Stops

Curb stops shall meet requirements specified in AWWA C800 and shall be Ford Model No.

B43 or approved equivalent. Inlets shall have compression connections and outlet shall have meter swivel nut. Valves shall be equipped with padlock eyes or approved equivalent.

f. Service Tubing

Service tubing shall be polyethylene (PE) and meet the requirements of ASTM D2737, SDR

9 and shall be listed as having the approval of the National Sanitation Foundation for Water

Distribution; and shall have the NSF approval designation stamped on the tubing. It shall be delivered in rolls and cut to required lengths. It shall be blue in color.

g. Service Tees

Service Tees for double services are to be pack joint or compression tees and are to meet requirements specified in ANSI/AWWA C800, Ford Model No. T444, Mueller H-

15381/Mueller P-15381 or approved equivalent.

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5. Valve Boxes

Cast iron valve boxes shall be provided for all underground valve installations. They shall consist of a base covering the operating nut and head of the valve, a vertical shaft, at least 5-

1/4 inches in diameter and with an adjustable length from 18” to 24”, and a top section extending to a point even with the finished ground surface. Provide a cast iron cover marked

"WATER" as required and placed concentrically over the operating nut along with an alignment box as provided by BoxLoc or approved equivalent. The assembly shall be suitable for highway traffic wheel loads.

The valve boxes shall be Clow, Mueller Company, Sigma or Tyler Union screw type valve box, or an approved equivalent.

6. Backflow Preventer

Double Detector Check Valve Assembly shall be used on fire protection system supply mains and shall be Watts, Zurn Wilkins or approved equivalent. PWS will change out meter on DCDA Assembly.

Backflow Preventers on residential water services shall be dual check valve assemblies, ASSE Standard 1024, Ford Meter Box Company HHS31, or approved equivalent.

Reduced pressure backflow preventers shall be used for all commercial and any residential with secondary water source. Reduced pressure backflow preventers shall meet ASSE

Standard 1013 and shall be Watts, Zurn Wilkins or approved equivalent.

7. Tapping Valves

Tapping valves shall meet the requirements of AWWA C-500 gate valves indicated above and be designed for making taps to existing mains under pressure. Valve, tees, and boring equipment used shall be mutually compatible. Tapping tees unless otherwise indicated shall be constructed of Hi-Build Epoxy coated ductile iron with non-corrosive accessories. All stainless steel bodied tees may be used. All nuts and bolts shall be non-corrosive and be compatible with fitting materials.

8. Submittals

The Contractor shall submit a minimum of two (2) copies of catalog data for approval by

PWS for materials to be used. Allow two weeks for submittal review. This submittal shall include but not be limited to the following:

▪ Pipe and Fittings

▪ Tubing

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▪ Valves, Boxes and Concrete Collars

▪ Hydrants

▪ All Service Materials

▪ Casing

▪ Backflow Preventers

▪ Tracer Wire and Silicone Wire Nuts

C. Installation of Pressure Pipework

This section covers installation of pressure pipework. Excavation and backfilling shall be in accordance with the General Sitework section of the specifications (see 5.2 Earthwork starting on sheet 5-4).

1. General

a. All pipe, fittings, and valves shall be carefully handled at all times to prevent damage to the pipe or other installation on the job site.

b. At times when pipe installation is not in progress, the open ends of the pipe shall be closed with a compatible pipe plug and shall remain closed until construction on that particular section is resumed, eliminating the possibility of any flow obstructions getting into the pipe.

c. All joints shall be wiped free of all dirt, sand and foreign material and the pipe shall be carefully examined for defects before installation.

d. Cutting of pipe for inserting valves, fittings, or closure pieces shall be done in a neat and workmanlike manner without damage to the pipe.

e. Deviations from the piping location, line and grade indicated on the construction plans shall not be made without the prior approval of the Engineer or Representative of PWS.

f. No pressure piping or fittings shall be allowed under any proposed paving including sidewalks, flumes, roadways, etc. with the exception of crossings.

2. Pipe Laying Procedures for Pressure Piping

a. Pressure piping shall be installed in strict accordance with the manufacturer's printed instructions. Before lowering the pipe into the trench the bottom of the trench shall be graded so that when the pipe rests on the trench bottom it will have a uniform bearing for its entire length. The pipe shall be carefully examined for defects and the inside cleaned.

After placing the pipe in the trench, the ends shall be wiped free from all dirt, sand and foreign material. The joints shall be made in accordance with the recommendations of the pipe manufacturer.

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Suitable concrete reaction or thrust blocks shall be applied on all lines (except those that are mechanically restrained), at all tees, plugs, caps, and bends deflecting 22-1/2 degrees or more, or movements shall be prevented by attaching metal rods or straps approved by the Engineer. Unless otherwise directed, the pipe shall be laid with bell ends facing in the direction of laying. Whenever it is necessary to deflect the pipe from a straight line, either in the vertical or horizontal plane, to avoid obstruction, to plumb stems, or where long radius curves are permitted, the degree at deflection shall be as recommended by the manufacturer of the pipe. Degree fittings are required on all long radius pipe runs as necessary.

The minimum cover for pipe will be 30-inches below top of curb unless otherwise indicated on the approved plans and a maximum cover of 48-inches unless approved by

PWS. The depth of cover shall be measured from the established street grades or the surface of the permanent improvement to the top of the barrel of the pipe. At street intersections or where the new pipe lines cross existing underground lines at the approximate same depth as the new line, the cover shall be increased and the new line laid below existing lines or structures. Where the existing lines or structures are of sufficient depth that the new lines when laid will have 6-inches of separating earth between them and other pipe or structure and 30-inches cover below top of curb, the new lines may be laid above the existing lines.

b. Road Crossings: In all new developments, pressure piping under road crossings shall be installed in steel casing under paving. HDPE or restrained bell PVC shall be used in casing. HDPE must be one pipe diameter size larger than pressure piping utilized on either side of road crossing. Casing spacers must be used.

c. Sub-Surface Explorations: Whenever necessary to determine the location of existing pipes, valves, or other underground structures, the Contractor shall examine all available records and shall make all explorations and excavations for such purpose. Where the locations of existing utilities are furnished by the Owner, they should be considered approximate only. The Contractor is responsible for locating and protecting all existing utilities whether shown on the drawings or not shown.

d. Protecting Underground and Surface Structures: Temporary support, adequate protection and maintenance of all underground and surface utility structures, drains, sewers, and other obstructions encountered in the progress of the work shall be furnished by the

Contractor at his own expense under the direction of the Engineer or PWS.

e. Construction Equipment: Mechanical equipment may be used for trenching and excavating. However in places where the operation of same will cause damage to trees, shrubbery, pavements or existing structures, above or below ground, hand methods shall be employed. Where a main is installed along paved streets rubber-tired equipment is recommended; however, if track equipment is necessary for excavation due to depths, 2-20 contractor will be permitted to use such equipment and will be responsible for any damage done to paved streets or lawns. Concrete driveways and asphalt pavement must be saw cut for final replacement.

f. Unsuitable Conditions: No pipe shall be laid in water or unsuitable soils conditions.

Unsuitable soil, as determined by the Engineer or PWS, shall be removed or replaced with an approved material.

g. Trench Water: At times when pipe laying is not in progress, the open ends of pipe shall be closed with a compatible pipe plug, and no trench water shall be permitted to enter the pipe.

h. Setting Valves and Boxes:

Valves and Fittings: Gate valves and pipe fittings shall be set and joined to new pipe in the manner as specified in this Pipe Laying Procedures for Pressure Piping section.

Valve Boxes: Cast-iron valve boxes shall be firmly supported and maintained, centered and plumb, over the wrench nut of the gate valve and box cover flush with the surface of the finished pavement or at such other level as may be directed. A concrete collar around valve box shall be required for protection. Tracer wire shall be looped in valve box and accessible at the top of valve box.

Valve Box Alignment Device (VBAD): All buried gate valves 3-inch through 12-inch requiring a valve box or any valve boxes that are set on a 3-inch to 12-inch buried gate valve shall be furnished with a VBAD. The device shall be of HDPE and colored white.

It shall be furnished in two pieces that will lock together under the operating nut without requiring the removal of the op nut. The device shall not affect the operation of the valve. No one-piece device will be accepted. The device shall be the BoxLoc as manufactured by Emma Sales, LLC, or approved equivalent.

i. Dewatering: The Contractor shall provide all necessary pumps to dewater the site properly, shall provide all labor and materials required to keep any open excavation dewatered during construction; and shall provide all necessary sheeting, bulkheads, drains, etc., so that construction operations may be performed under dry conditions.

Discharge from pumps must be led to natural drainage channels, to drains, or to storm sewer. Contractor is responsible for all permitting and testing of dewatering discharge.

j. Service Pipe: Service pipe shall have a minimum depth of 30 inches at all highway crossings and 18 inches elsewhere. The requirements for trenching and backfilling as described in the General Sitework section of the specifications (see 5.2 Earthwork starting on sheet 5-4) shall apply. Removal of pavements or sidewalk will not be permitted for water service lines. They may be installed by jacking, boring or pushing

2-21 under sidewalks. All services shall be incased under all paving including sidewalks, flumes, roadways, etc.

k. Plugging Dead Ends: Standard plugs shall be inserted into the bells of all dead ends of pipes, tees, or crosses, and spigot ends shall be capped. Plugs or caps shall be joined to the pipe or fittings in the appropriate manner.

l. Concrete Encasement and Special Pipe Support: Provide concrete encasements or special pipe supports as shown on the drawings or directed by the Engineer or PWS. Various pipe supports shall be as worked out in the field to suit local conditions and emergencies.

Where, in the opinion of Engineer or PWS, pipe covering is inadequate, concrete encasement for protection shall be provided in accordance with the details on the approved drawings. Concrete encasements shall be made using concrete with a 28-day strength of 2000 psi and shall be to the dimensions indicated on the construction plans and as required by the applicable Department of Transportation or Public Health regulations. All other concrete needed to build and protect the pipe work shall be used at the direction of the Engineer or PWS.

m. Separation of Water Mains and Sewers/Reclaimed Water: Water mains or sewer mains that are laid in the vicinity of each other shall meet the horizontal and vertical separations specified as followed:

▪ 6-foot horizontal separation between water main and sewer main

▪ 3-foot horizontal separation between water main and reclaimed water main

▪ 18-inch vertical separation between water main and sewer/reclaimed water main

Separation is to be based on the outside diameter of each main.

n. Backfilling: Backfill material shall be free from rocks or boulders or any other objectionable material and shall be placed in the trench and compacted simultaneously on both sides of the pipe for the full width of the trench, and to an elevation level with ground on either side to densities indicated in General Sitework section of the specifications (see 5.2 Earthwork starting on sheet 5-4).

o. Repaving: Pavement removal where required in the construction of project shall be done by the Contractor in a workmanlike manner. Care must be taken to make the saw cut in a straight line so the patch will be neat.

Asphalt paving shall be replaced as described in the General Sitework section (see 5.1

Sitework sheet 5-2) and in accordance with the standard detail drawings. Concrete driveways and pavement shall be replaced using concrete with high early strength so that traffic may be resumed quickly. Concrete must be finished to conform with existing pavement.

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p. Clean-Up: Before final inspection and acceptance, the Contractor shall clean ditches, shape shoulders, and restore all disturbed areas, including street crossing, grass plots, to as good a condition as existed before work started. All trenches shall be leveled, and loose material removed from pavement gutters and sidewalks, employing hand labor, if necessary.

3. Anchorage of Bends, Tees, and Plugs

a. Thrust Backing Placement

Reaction or thrust backing shall be placed on all pipe lines two-inches in diameter or larger at all tees, plugs, caps and at bends deflecting 22-1/2 degrees or more, or movement shall be prevented by attaching metal rods or straps as approved by the Engineer.

b. Materials for Thrust Backing

Reaction, or thrust backing shall be of concrete that has a 28-day compressive strength of not less than 2000 psi. Reaction backing will be placed in accordance with the details on the approved construction plans and standard details. Combination of mega lugs and bell restraints may be used in lieu of thrust block. Refer to chart below:

Thrust Block Restraint Chart

Backing shall be placed between solid ground and the fitting to be anchored. The backing shall, unless otherwise directed, be so placed that the pipe and fitting joints will be accessible for repairs. No extra payment will be made for this material but shall be included in the unit price bid for the various sizes of pipe.

In some cases, the Engineer may direct the Contractor to provide backing using cables and

"deadman" anchors where the soil conditions will not support the normal concrete type as described above.

D. Taps on Potable Pressurized Lines (Wet Tap)

The contractor shall perform taps on potable pressurized lines for the installation of pipes in accordance with the following requirements:

Materials: All materials used for taps on potable pressurized lines shall meet the requirements in the Tapping Valve section on sheet 2-15. Tapping sleeves shall be properly sized for the pipe being tapped. Resilient seated tapping valves shall be furnished with special end connections.

All other material used to complete the tap shall meet the AWWA standards for potable water construction.

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Procedure: The contractor shall notify PWS Inspector 48-hours prior to tap. PWS

Inspector/Engineer must be present for the hydrostatic pressure testing and tapping of the main.

The hydrostatic pressure test shall be 150 psi minimum for a duration of 15 minutes. As an alternate, air testing is permissible at 50 psi for a duration of 15 minutes. The following chart demonstrates the tapping machine shell cutter outside diameter.

Nominal

Main Size

Tapping Valve ID

AWWA Standard

Tapping Machine Shell Cutter OD

2” 2-1/8” 1-1/2”

3” 3-1/8” 2-1/2”

4” 1-1/4” 3-1/2”

6” 6-1/4” 5-1/2”

8” 8-1/4” 7-1/2”

10” 10-1/4” 9-1/2”

12” 12-1/4” 11-1/2”

14” 14-1/4” Per Manufacturer’s Recommendation

16” 16-1/4” Contractor shall submit shop drawings for valves and tapping machine for approval, prior to use.

Per Manufacturer’s Recommendation.

18” 18-1/4”

20” 20-1/4”

24” 24-1/4”

Tap coupon shall be given to PWS Inspector. If the coupon is lost in the main, contractor shall at his expense, dismantle main to retrieve the coupon. Main will be reassembled, pressure tested and bacteriological tests retaken as required at contractor’s expense.

E. Testing and Inspection

1. General

During construction and at the completion of the work, the Contractor shall make such tests as required for potable pressure pipework. PWS Inspector or Project

Engineer/Representative will observe the tests, but the Contractor shall furnish all apparatus required and shall pay all costs connected therewith. Defective work shall be repaired immediately at the Contractor's expense.

In general, tests shall conform to usually accepted testing practices for the specific type and class of test. All data, observations and results will be carefully recorded, and the PWS

Engineer will be furnished two signed copies of all data and reports. Project acceptance may be held contingent on receipt of satisfactory test reports.

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All new construction shall be secured prior to acceptance by PWS. Valves between new systems and existing systems that are not yet accepted shall be closed while unattended, ie.

nights, weekends, and holidays.

2. Hydrostatic Tests of Potable Pressure Pipework

a. Pressure During Test: After the pipe has been laid and backfilled as specified, each valved section of newly laid pipe shall, unless otherwise specified, be subjected to a hydrostatic pressure equal to the pressure rating of the pipe being tested but not less than

150 psig. The Contractor shall record the testing by the use of a pressure recording gauge and after all testing is complete, the recordings shall be turned over to the Engineer/PWS

Representative for his files. Gauge shall be clearly visible.

b. Duration of Pressure Test: The duration of each pressure test shall be at least 2 hours.

c. Procedure: Each section of pipe shall be slowly filled with water and the specified test pressure, measured at the lowest point of…