33 14 13 - Public Water Utility

Distribution Piping

1.0 General

1.1 Summary

A. Section Includes:

1. Pipe and fittings for public line, including potable water line.

2. Tapping sleeves and valves.

3. Line stops.

4. Valves and fire hydrants.

5. Underground pipe markers.

6. Bedding and cover materials.

7. Joint Restraints.

B. Related Requirements:

1. Section 01 78 39.B - Contractor Requirements - Data Deliverables for Water and

Sewer Infrastructure Construction Projects.

2. Section 03 20 00 – Concrete Reinforcing: Reinforcing steel and required supports for cradles and encasements.

3. Section 03 30 00 – Cast-in-Place Concrete: Concrete for cradles and encasements.

4. Section 33 13 00 – Disinfection of Water Utility Distribution: Disinfection of water mains and appurtenances.

5. Section 33 05 53 – Identification and Signage for Utilities: Pipe markers.

6. Section 33 14 17 – Site Water Service Utility Laterals: Water main service connections.

7. Section 33 14 19 – Valves and Hydrants for Water Utility Service: Fire hydrants, valves, and valve boxes for fire hydrant and water main installations.

1.2 Reference Standards

A. American Society of Mechanical Engineers:

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

250.

B. ASTM International:

1. ASTM A36 – Standard Specification for Carbon Structural Steel.

2. ASTM A307 – Standard Specification for Carbon Steel Bolts, Studs, and Threaded

Rod 60 000 PSI Tensile Strength.

C. American Water Works Association:

1. AWWA C104 – Cement-Mortar Lining for Ductile-Iron Pipe and Fittings.

2. AWWA C110 – Ductile-Iron and Gray-Iron Fittings.

3. AWWA C111 – Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings.

4. AWWA C151 – Ductile-Iron Pipe, Centrifugally Cast.

5. AWWA C153 – Ductile-Iron Compact Fittings.

6. AWWA C205 – Cement-Mortar Protective Lining and Coating for Steel Water Pipe -

4 In. (100 mm) and Larger – Shop Applied.

7. AWWA C213 – Fusion-Bonded Epoxy Coating for the Interior and Exterior of Steel

Water Pipelines.

8. AWWA C500 – Metal-Seated Gate Valves for Water Supply Service.

9. AWWA C600 – Installation of Ductile-Iron Mains and Their Appurtenances.

D. Manufacturers Standardization Society of the Valve and Fittings Industry:

1. MSS SP-60 – Connecting Flange Joints between Tapping Sleeves and Tapping

Valves.

1.3 Submittals

A. Section 01 33 00 – Submittal Procedures: Requirements for submittals.

B. Product Data: The Contractor shall submit data on pipe materials, pipe fittings, valves, and accessories.

C. Shop Drawings: The Contractor shall indicate piping layout, including piping specialties.

1.4 Closeout Submittals

A. Section 01 77 00 – Closeout Procedures: Requirements for submittals.

B. Project Record Documents: The Contractor shall record actual locations of piping mains, valves, connections, thrust restraints, and invert elevations.

C. The Contractor shall identify and describe unexpected variations to subsoil conditions or discovery of uncharted utilities.

1.5 Quality Assurance

A. Valves: Mark valve body with manufacturer's name and pressure rating.

B. Design Criteria:

1. The Contractor shall use only one type and class of pipe in any continuous line of waterline, unless otherwise indicated on the Contract Drawings.

2. The Contractor shall use pipe and fittings designed to withstand imposed trench loadings and conditions at the various locations.

1.6 Delivery, Storage, and Handling

A. Section 01 61 00 – Product Requirements: Requirements for transporting, handling, storing, and protecting products.

B. Deliver and store valves in shipping containers with manufacturer's labeling in place and inspect for damage.

C. The Contractor shall block individual and stockpiled pipe lengths to prevent moving.

D. The Contractor shall not place pipe or pipe materials on private property or in areas obstructing pedestrian or vehicle traffic.

E. The Contractor shall thoroughly inspect pipe, pipe linings, fittings, valves, and all related materials for defects prior to being unloaded and again prior to being installed.

Repair or replace any defective, damaged, or unsound material, as determined by

Engineer, at no additional cost to Owner. The Contractor shall remove defective products and materials from site at Contractor's expense.

F. The Contractor shall store all valves with rubber seats out of sunlight with discs or plugs opened slightly off seat (3 to 5 degrees).

1.7 Existing Conditions

A. Field Measurements:

1. The Contractor shall verify field measurements prior to fabrication.

2. The Contractor shall indicate field measurements on Shop Drawings.

2.0 Products

2.1 General

A. All piping, fittings, and appurtenances shall be NSF 61 approved/certified.

2.2 Water Piping

A. Ductile Iron Pipe:

1. Comply with AWWA C151.

2. Bituminous Outside Coating: Comply with AWWA C151.

3. Pipe Mortar Lining:

a. Comply with AWWA C104.

b. Double thickness.

4. Pipe Class:

a. Comply with AWWA C151.

b. Class 52.

5. Fittings:

a. Material: Ductile iron, AWWA C110.

b. Compact Fittings: Comply with AWWA C153.

c. Coating and Lining:

i. Bituminous Coating: Comply with AWWA C110.

ii. Cement Mortar Lining: Comply with AWWA C104, double thickness.

6. Joints:

a. Mechanical Joints: Comply with AWWA C111.

b. Restrained Joints: All joints shall be fully-restrained.

i. EBAA MEGALUG Mechanical Joint Restraints;

ii. Romac Romagrip Mechanical Joint Restraint;

iii. US Pipe TR FLEX;

iv. American FLEX-RING;

v. Or approved equal.

c. Push-On Joints: Comply with AWWA C111.

2.3 Tapping Sleeves and Valves

A. Tapping Sleeves:

1. Manufacturers:

a. Mueller Co.

b. Romac Industries, Inc.; Model SST or SSTIII.

c. Or approved equal.

2. Description:

a. Complies with AWWA C223.

b. Material: Stainless Steel.

c. Type: Dual compression.

d. Gasket: EPDM or Nitrile, full circumference.

e. Fasteners: Integrated threaded fasteners or triangular side-bars and drop in bolts.

f. Outlet Flange Dimensions and Drilling: Comply with ASME B16.1, Class 200, and MSS SP-60.

B. Tapping Valves:

1. Manufacturers:

a. American Flow Control.

b. Mueller Co.

c. Or approved equal.

2. Description:

a. Comply with AWWA C515.

b. Type: Resilient wedge with non-rising stem.

c. Inlet Flanges: Comply with ASME B16.1, Class 200, and MSS SP-60.

d. Mechanical Joint Outlets: Comply with AWWA C111.

e. Operation:

i. Square operating nut.

ii. Opening Direction: Counterclockwise (left).

3. Mark manufacturer's name and pressure rating on valve body.

2.4 Temporary Line Stops

A. Option A:

1. Manufacturers:

a. JCM Industries.

b. Or approved equal.

2. Description:

a. Pressure Rating: 250 psi.

b. Body: 304 Stainless Steel or Epoxy Coated Carbon Steel.

c. Blind Flange and Flange: ANSI Class 150.

d. Completion Plug: Push and Pin Style.

e. Gasket: Nitrile or EPDM.

B. Option B:

1. Manufacturers:

a. EZ Valve.

b. Or approved equal.

2. Description:

a. Comply with AWWA C509.

b. Pressure Rating: 250 psi.

c. Body: Ductile Iron.

2.5 Couplings

A. Manufacturer:

1. Romac.

2. Smith-Blair.

3. Or approved equal.

B. Description:

1. Body: ASTM A36 Steel.

2. Restraint Gland: Ductile iron meeting ASTM A536.

3. Gasket: Nitrile or EPDM.

4. Bolts and nuts: Type 304 or 316 stainless steel.

5. Finish: Fusion bonded epoxy coating.

6. Transition couplings must be restrained.

2.6 Valves and Fire Hydrants

A. Valves and Hydrants: As specified in Section 33 14 19 – Valves and Hydrants for Water

Utility Service: Fire hydrants, valves, and valve boxes for fire hydrant and water main installations.

2.7 Underground Pipe Markers

A. Plastic Ribbon Tape:

1. Refer to 33 05 53 – Identification for Utilities Piping and Equipment.

2.8 Valve Boxes

A. Manufacturers:

1. Tyler Utilities.

2. Bingham & Taylor.

3. Ford.

4. Or approved equal.

B. Description:

1. 12-inch Diameter Valves and Smaller:

a. Material: Cast iron.

b. Coating: Tar or asphaltic compound; interior and exterior.

c. Type: Two piece; screw.

2. Lid Inscription: WATER.

2.9 Concrete Encasement and Cradles

A. Concrete:

1. As specified in Section 03 30 00 – Cast-in-Place Concrete.

2. Type: reinforced, air entrained.

3. Compressive Strength: 4,000psi at 28 days.

4. Finish: Rough troweled.

B. Concrete Reinforcement: As specified in Section 03 20 00 – Concrete Reinforcing.

2.10 Accessories

A. Steel Rods, Bolt, Lugs, and Brackets:

1. Comply with ASTM A36 or ASTM A307.

2. Grade A carbon steel.

3.0 Execution

3.1 Examination

A. Section 01 73 00 – Execution Requirements: Requirements for installation examination.

B. The Contractor shall verify that existing utility water main size, location, and invert are as indicated on the Contract Drawings. The Contractor shall immediately report all discrepancies to the Engineer.

3.2 Preparation

A. Section 01 73 00 – Execution Requirements: Requirements for installation preparation.

B. Pipe Cutting:

1. The Contractor shall cut pipe ends square, ream pipe and tube ends to full pipe diameter, and remove burrs.

2. The Contractor shall use only equipment specifically designed for pipe cutting; use of chisels or hand saws is not permitted.

3. The Contractor shall grind edges smooth with beveled end for push-on connections.

C. The Contractor shall remove scale and dirt on inside and outside before assembly.

3.3 Installation

A. Bedding:

1. Excavation:

a. The Contractor shall excavate pipe trench as specified in Section 31 23 33 –

Trenching and Backfilling for Utilities for Work of this Section.

b. The Contractor shall hand trim excavation for accurate placement of pipe to elevations as indicated on Drawings.

2. The Contractor shall dewater excavations to maintain dry conditions and to preserve final grades at bottom of excavation.

3. The Contractor shall provide sheeting and shoring as specified in Section 31 23 33

– Trenching and Backfilling for Utilities.

B. Piping:

1. The Contractor shall install pipe according to AWWA C600.

2. The Contractor shall handle and assemble pipe according to manufacturer instructions and as indicated on the Contract Drawings. The Contractor shall pay special and particular attention to avoid damaging the exterior coating of all pipe, fittings, valves, and such appurtenances.

3. Steel Rods, Bolt, Lugs, and Brackets: The Contractor shall coat buried steel with one coat of coal tar coating before backfilling.

4. The Contractor shall maintain 10 feet horizontal separation of water main from sewer piping, unless otherwise shown on the Contract Drawings or specifically dictated by the Engineer.

5. The Contractor shall install ductile iron piping and fittings according to AWWA C600.

6. The Contractor shall route pipe in straight line; re-lay pipe that is out of alignment or grade.

7. High Points:

a. The Contractor shall endeavor to install pipe with no high points.

b. If unforeseen field conditions arise that necessitate high points, the Contractor shall install air release valves or blow-off assembly as directed by Engineer.

Where an air release valve or blow-off assembly is not directed to be installed, the Contractor shall ensure that high points in pressurized potable water systems correspond to an individual water service connection.

8. Bearing:

a. The Contractor shall install pipe to have bearing along its entire length.

b. The Contractor shall excavate bell holes to permit proper joint installation.

c. The Contractor shall not lay pipe in wet or frozen trench.

9. The Contractor shall prevent foreign material from entering pipe during placement.

10. The Contractor shall install pipe to allow for expansion and contraction without stressing pipe or joints.

11. The Contractor shall close pipe openings with watertight plugs during Work stoppages.

12. The Contractor shall install access fittings to permit disinfection of water system performed under Section 33 13 00 – Disinfection of Water Utility Distribution. The

Contractor shall coordinate these locations with the Engineer, prior to installation in the field. No separate or additional payment shall be made to the Contractor if relocation of access fittings for testing and/or disinfection are required by the

Engineer, where the Contractor did not properly coordinate in advance with the

Engineer.

13. Cover:

a. The Contractor shall establish elevations of buried piping with not less than 4 feet of cover.

b. The Contractor shall measure depth of cover from final surface grade to top of pipe barrel.

14. Pipe Markers:

a. The Contractor shall install plastic ribbon tape continuous buried 24-inches below finish grade, but at least 12-inches above piping.

b. The Contractor shall coordinate with trench Work as specified in Section 31 23

33 – Trenching and Backfilling for Utilities.

C. Valves and Hydrants:

1. The Contractor shall install valves and hydrants as specified in Section 33 14 19

– Valves and Hydrants for Water Utility Service: Fire hydrants, valves, and valve boxes for fire hydrant and water main installations.

D. Tapping Sleeves and Valves:

1. The Contractor shall furnish and install tapping sleeves and valves as indicated on the Contract Drawings and according to manufacturer instructions.

E. Thrust Restraints:

1. The Contractor shall provide valves, tees, bends, caps, and plugs with mechanically restrained joints.

2. The Contractor shall install tie rods, clamps, setscrew retainer glands, or restrained joints.

3. The Contractor shall protect metal-restrained joint components against corrosion by applying a bituminous coating or encasing metal area using concrete mortar.

4. The Contractor shall not encase pipe and fitting joints to flanges.

5. The Contractor shall install tie rods, and joint restraint at dead ends of water main.

6. Additional mechanical joint restraints may be required. The Contractor shall furnish and install all mechanical joint restraints as required to conduct the Work in accordance with the Contract Documents.

7. (The Contractor may elect to also furnish and install cast-in-place concrete thrust blocks, to augment mechanical joint restraints. Concrete thrust blocking shall not take the place of mechanical joint restraints, except when specifically authorized in writing by the Engineer and Owner. No separate or additional payment shall be made if the Contractor elects to furnish and install concrete thrust blocking.)

F. Service Connections:

1. As specified in Section 33 14 17 – Site Water Service Utility Laterals.

G. Backfilling: The Contractor shall backfill around sides and to top of pipe as specified in

Section 31 23 33 – Trenching and Backfilling for Utilities.

H. Hydrostatic Testing for Water Piping System:

1. The Contractor shall conduct Hydrostatic Testing as specified in Section 33 05

05.31 – Hydrostatic Testing.

I. Disinfection of Potable Water Piping System:

1. The Contractor shall properly disinfect potable water piping as specified in Section

33 13 00 – Disinfection of Water Utility Distribution.

J. Certain improvements shall be field-located by the Contractor using GPS. See Sections

01 78 39 and 01 78 39.B "Contractor Requirements - Data Deliverables for Water and

Sewer Infrastructure Construction Projects".

END OF SECTION