Attachment_10_-_Revised_221116_-_Domestic_Water_Piping_0002.pdf
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This document is a technical specification for Domestic Water Piping for the Henry Mountain Field Station Replacement project in December 2021. The specification covers the materials, installation, and testing requirements for domestic water piping systems, including CPVC, PEX, and PVC piping types. Key technical requirements include using Schedule 40 or Schedule 80 pipes with specific fitting standards (ASTM F441, F876, D1785), installation methods for different pipe types, and detailed procedures for joint construction, supports, connections, and system testing.
The specification provides comprehensive guidance for contractors, including requirements for piping applications under building slabs and aboveground, transition fittings, hanger installations, and mandatory cleaning and disinfection procedures. Critical installation requirements include supporting horizontal piping within 12 inches of fittings, using specific joining techniques for different materials, and conducting pressure tests at 50 psig above operating pressure. The document also mandates detailed inspection processes, including roughing-in and final inspections by authorities having jurisdiction, and requires comprehensive cleaning and disinfection of the domestic water piping system using chlorine solutions and potable water flushing.
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DECEMBER 2021 DOMESTIC WATER PIPING
HENRY MOUNTAIN FIELD STATION REPLACEMENT 221116 - 1
SECTION 221116 - DOMESTIC WATER PIPING
PART 1 - GENERAL
1.1 SUMMARY
A. Section Includes:
1. CPVC piping.
2. PEX tube and fittings.
3. PVC pipe and fittings.
4. Piping joining materials.
5. Transition fittings.
6. Dielectric fittings.
B. Related Requirements:
1. Section 331415 "Site Water Distribution Piping" for water-service piping outside the building from source to the point where water-service piping enters the building.
1.2 ACTION SUBMITTALS
A. Product Data: For transition fittings and dielectric fittings.
B. Sustainable Design Submittals:
1.3 INFORMATIONAL SUBMITTALS
A. System purging and disinfecting activities report.
B. Field quality-control reports.
1.4 WARRANTY
A. Polypropylene Piping (PP-R) Manufacturer's Warranty: Manufacturer agrees to repair or replace PP-R pipe and fittings that fail in materials or workmanship within 10 years from date of Substantial Completion.
1. Warranty is to cover labor and material costs of repairing and/or replacing defective materials and repairing any incidental damage caused by failure of the piping system due to defects in materials or manufacturing.
2. Warranty is to be in effect only upon submission by the Contractor to the manufacturer of valid pressure/leak documentation indicating that the system was tested and passed the manufacturer's pressure/leak test.
HENRY MOUNTAIN FIELD STATION REPLACEMENT 221116 - 2
PART 2 - PRODUCTS
2.1 PIPING MATERIALS
A. Comply with requirements in "Piping Schedule" Article for applications of pipe, tube, fitting materials, and joining methods for specific services, service locations, and pipe sizes.
B. Potable-water piping and components shall comply with NSF 14, NSF 61, and NSF 372.
2.2 CPVC PIPING
A. CPVC Pipe: ASTM F441/F441M, with wall thickness as indicated in "Piping Applications" Article.
1. CPVC Socket Fittings: ASTM F438 for Schedule 40.
2. CPVC Threaded Fittings: ASTM F437, Schedule 80.
B. CPVC Piping System: ASTM D2846/D2846M, SDR 11, pipe and socket fittings.
C. CPVC Tubing System: ASTM D2846/D2846M, SDR 11, tube and socket fittings.
2.3 PEX TUBE AND FITTINGS
A. Tube Material: PEX plastic according to ASTM F876 and ASTM F877.
B. Fittings: ASTM F1807, metal insert and copper crimp rings or ASTM F1960, cold expansion fittings and reinforcing rings.
C. Push-Fit Fittings: ASSE 1061, push-fit fittings.
D. Manifold: Multiple-outlet, plastic or corrosion-resistant-metal assembly complying with ASTM F876; with plastic or corrosion-resistant-metal valve for each outlet.
2.4 PVC PIPE AND FITTINGS
A. PVC Pipe: ASTM D1785, with wall thickness as indicated in "Piping Applications" Article.
B. PVC Socket Fittings: ASTM D2466 for Schedule 40.
C. PVC Schedule 80 Threaded Fittings: ASTM D2464.
2.5 PIPING JOINING MATERIALS
A. Pipe-Flange Gasket Materials:
1. AWWA C110/A21.10, rubber, flat face, 1/8 inch thick or ASME B16.21, nonmetallic and asbestos free unless otherwise indicated.
HENRY MOUNTAIN FIELD STATION REPLACEMENT 221116 - 3
2. Full-face or ring type unless otherwise indicated.
B. Metal, Pipe-Flange Bolts and Nuts: ASME B18.2.1, carbon steel unless otherwise indicated.
C. Solder Filler Metals: ASTM B32, lead-free alloys.
D. Flux: ASTM B813, water flushable.
E. Brazing Filler Metals: AWS A5.8M/A5.8, BCuP Series, copper-phosphorus alloys for general-duty brazing unless otherwise indicated.
F. Solvent Cements for Joining CPVC Piping and Tubing: ASTM F493.
G. Solvent Cements for Joining PVC Piping: ASTM D2564. Include primer according to
ASTM F656.
H. Plastic, Pipe-Flange Gaskets, Bolts, and Nuts: Type and material recommended by piping system manufacturer unless otherwise indicated.
2.6 TRANSITION FITTINGS
A. General Requirements:
1. Same size as pipes to be joined.
2. Pressure rating at least equal to pipes to be joined.
3. End connections compatible with pipes to be joined.
B. Fitting-Type Transition Couplings: Manufactured piping coupling or specified piping system fitting.
C. Plastic-to-Metal Transition Fittings:
1. Description:
a. CPVC or PVC one-piece fitting with manufacturer's Schedule 80 equivalent dimensions.
b. One end with threaded brass insert and one solvent-cement-socket or threaded end.
D. Plastic-to-Metal Transition Unions:
1. Description:
a. CPVC or PVC four-part union.
b. Brass or stainless steel threaded end.
c. Solvent-cement-joint or threaded plastic end.
d. Rubber O-ring.
e. Union nut.
HENRY MOUNTAIN FIELD STATION REPLACEMENT 221116 - 4
PART 3 - EXECUTION
3.1 PIPING APPLICATIONS
A. Transition and special fittings with pressure ratings at least equal to piping rating may be used in applications below unless otherwise indicated.
B. Flanges and unions may be used for aboveground piping joints unless otherwise indicated.
C. Fitting Option: Extruded-tee connections and brazed joints may be used on aboveground copper tubing.
D. Under-building-slab, domestic water, building-service piping, NPS 3 and smaller, shall be the following:
1. PVC, Schedule 40; socket fittings; and solvent-cemented joints.
E. Under-building-slab, domestic water, building-service piping, NPS 4 to NPS 8 and larger, shall be the following:
1. PVC, Schedule 40; socket fittings; and solvent-cemented joints.
F. Under-building-slab, domestic water piping, NPS 2 and smaller, shall be the following:
1. PVC, Schedule 40; socket fittings; and solvent-cemented joints.
G. Aboveground domestic water piping, NPS 2 and smaller, shall be one of the following:
1. CPVC, Schedule 40; socket fittings; and solvent-cemented joints.
2. CPVC, Schedule 80 pipe; CPVC, Schedule 80 threaded fittings; and threaded joints.
3. CPVC Tubing System: CPVC tube; CPVC socket fittings; and solvent-cemented joints. NPS 1-1/2 and NPS 2 CPVC pipe with CPVC socket fittings may be used instead of tubing.
4. PEX tube, NPS 1 and smaller.
a. Fittings for PEX tube:
1) ASTM F1807, metal insert and copper crimp rings.
2) ASTM F1960, cold expansion fittings and reinforcing rings.
3) ASSE 1061, push-fit fittings.
5. PVC, Schedule 40; socket fittings; and solvent-cemented joints.
3.2 EARTHWORK
A. Comply with requirements in Section 312000 "Earth Moving" for excavating, trenching, and backfilling.
3.3 INSTALLATION OF PIPING
A. Drawing plans, schematics, and diagrams indicate general location and arrangement of domestic water piping. Indicated locations and arrangements are used to size pipe and calculate friction
HENRY MOUNTAIN FIELD STATION REPLACEMENT 221116 - 5
loss, expansion, and other design considerations. Install piping as indicated unless deviations to layout are approved on coordination drawings.
B. Install valves according to the following:
1. Section 220523.12 "Ball Valves for Plumbing Piping."
2. Section 220523.13 "Butterfly Valves for Plumbing Piping."
3. Section 220523.14 "Check Valves for Plumbing Piping."
4. Section 220523.15 "Gate Valves for Plumbing Piping."
C. Install water-pressure-reducing valves downstream from shutoff valves. Comply with requirements for pressure-reducing valves in Section 221119 "Domestic Water Piping Specialties."
D. Install domestic water piping level without pitch and plumb.
E. Rough-in domestic water piping for water-meter installation according to utility company's requirements.
F. Install seismic restraints on piping. Comply with requirements for seismic-restraint devices in Section 220548 "Vibration and Seismic Controls for Plumbing Piping and Equipment."
G. Install piping concealed from view and protected from physical contact by building occupants unless otherwise indicated and except in equipment rooms and service areas.
H. Install piping indicated to be exposed and piping in equipment rooms and service areas at right angles or parallel to building walls. Diagonal runs are prohibited unless specifically indicated otherwise.
I. Install piping above accessible ceilings to allow sufficient space for ceiling panel removal, and coordinate with other services occupying that space.
J. Install piping to permit valve servicing.
K. Install nipples, unions, special fittings, and valves with pressure ratings the same as or higher than the system pressure rating used in applications below unless otherwise indicated.
L. Install piping free of sags and bends.
M. Install fittings for changes in direction and branch connections.
N. Install PEX tubing with loop at each change of direction of more than 90 degrees.
O. Install pressure gauges on suction and discharge piping for each plumbing pump and packaged booster pump. Comply with requirements for pressure gauges in Section 220519 "Meters and Gages for Plumbing Piping."
P. Install thermostats in hot-water circulation piping. Comply with requirements for thermostats in Section 221123 "Domestic Water Pumps."
HENRY MOUNTAIN FIELD STATION REPLACEMENT 221116 - 6
Q. Install thermometers on inlet and outlet piping from each water heater. Comply with requirements for thermometers in Section 220519 "Meters and Gages for Plumbing Piping."
R. Install sleeves for piping penetrations of walls, ceilings, and floors. Comply with requirements for sleeves specified in Section 220517 "Sleeves and Sleeve Seals for Plumbing Piping."
S. Install sleeve seals for piping penetrations of concrete walls and slabs. Comply with requirements for sleeve seals specified in Section 220517 "Sleeves and Sleeve Seals for Plumbing Piping."
T. Install escutcheons for piping penetrations of walls, ceilings, and floors. Comply with requirements for escutcheons specified in Section 220518 "Escutcheons for Plumbing Piping."
3.4 JOINT CONSTRUCTION
A. Ream ends of pipes and tubes and remove burrs. Bevel plain ends of steel pipe.
B. Remove scale, slag, dirt, and debris from inside and outside of pipes, tubes, and fittings before assembly.
C. Threaded Joints: Thread pipe with tapered pipe threads according to ASME B1.20.1. Cut threads full and clean using sharp dies. Ream threaded pipe ends to remove burrs and restore full ID. Join pipe fittings and valves as follows:
1. Apply appropriate tape or thread compound to external pipe threads.
2. Damaged Threads: Do not use pipe or pipe fittings with threads that are corroded or damaged.
D. Flanged Joints: Select appropriate asbestos-free, nonmetallic gasket material in size, type, and thickness suitable for domestic water service. Join flanges with gasket and bolts according to
ASME B31.9.
E. Joint Construction for Solvent-Cemented Plastic Piping: Clean and dry joining surfaces. Join pipe and fittings according to the following:
1. Comply with ASTM F402 for safe-handling practice of cleaners, primers, and solvent cements. Apply primer.
2. CPVC Piping: Join according to ASTM D2846/D2846M Appendix.
3. PVC Piping: Join according to ASTM D2855.
F. Joints for PEX Tubing, ASTM: Join according to ASTM F1807 for metal insert and copper crimp ring fittings and ASTM F1960 for cold expansion fittings and reinforcing rings.
G. Joints for PEX Tubing, ASSE: Join according to ASSE 1061 for push-fit fittings.
H. Joints for Dissimilar-Material Piping: Make joints using adapters compatible with materials of both piping systems.
HENRY MOUNTAIN FIELD STATION REPLACEMENT 221116 - 7
3.5 INSTALLATION OF TRANSITION FITTINGS
A. Install transition couplings at joints of dissimilar piping.
B. Transition Fittings in Underground Domestic Water Piping:
1. Fittings for NPS 1-1/2 and Smaller: Fitting-type coupling.
2. Fittings for NPS 2 and Larger: Sleeve-type coupling.
C. Transition Fittings in Aboveground Domestic Water Piping NPS 2 and Smaller: Plastic-to-metal transition fittings or unions.
3.6 INSTALLATION OF HANGERS AND SUPPORTS
A. Comply with requirements for seismic-restraint devices in Section 220548 "Vibration and Seismic Controls for Plumbing Piping and Equipment."
B. Comply with requirements for hangers, supports, and anchor devices in Section 220529 "Hangers and Supports for Plumbing Piping and Equipment."
C. Install vinyl-coated hangers for CPVC and PVC piping, with maximum horizontal spacing and minimum rod diameters, to comply with manufacturer's written instructions, locally enforced codes, and authorities having jurisdiction requirements, whichever are most stringent.
D. Install vinyl-coated hangers for PEX tubing, with maximum horizontal spacing and minimum rod diameters, to comply with manufacturer's written instructions, locally enforced codes, and authorities having jurisdiction requirements, whichever are most stringent.
E. Support horizontal piping within 12 inches of each fitting.
F. Support vertical runs of CPVC and PVC piping to comply with manufacturer's written instructions, locally enforced codes, and authorities having jurisdiction requirements, whichever are most stringent.
G. Support vertical runs of PEX tubing to comply with manufacturer's written instructions, locally enforced codes, and authorities having jurisdiction requirements, whichever are most stringent.
3.7 CONNECTIONS
A. Drawings indicate general arrangement of piping, fittings, and specialties.
B. When installing piping adjacent to equipment and machines, allow space for service and maintenance.
C. Connect domestic water piping to exterior water-service piping. Use transition fitting to join dissimilar piping materials.
D. Connect domestic water piping to water-service piping with shutoff valve; extend and connect to the following:
HENRY MOUNTAIN FIELD STATION REPLACEMENT 221116 - 8
1. Water Heaters: Cold-water inlet and hot-water outlet piping in sizes indicated, but not smaller than sizes of water heater connections.
2. Plumbing Fixtures: Cold- and hot-water-supply piping in sizes indicated, but not smaller than that required by plumbing code.
3. Equipment: Cold- and hot-water-supply piping as indicated, but not smaller than equipment connections. Provide shutoff valve and union for each connection. Use flanges instead of unions for NPS 2-1/2 and larger.
3.8 IDENTIFICATION
A. Identify system components. Comply with requirements for identification materials and installation in Section 220553 "Identification for Plumbing Piping and Equipment."
3.9 ADJUSTING
A. Perform the following adjustments before operation:
1. Close drain valves, hydrants, and hose bibbs.
2. Open shutoff valves to fully open position.
3. Open throttling valves to proper setting.
4. Adjust balancing valves in hot-water-circulation return piping to provide adequate flow.
a. Manually adjust ball-type balancing valves in hot-water-circulation return piping to provide hot-water flow in each branch.
b. Adjust calibrated balancing valves to flows indicated.
5. Remove plugs used during testing of piping and for temporary sealing of piping during installation.
6. Remove and clean strainer screens. Close drain valves and replace drain plugs.
7. Remove filter cartridges from housings and verify that cartridges are as specified for application where used and are clean and ready for use.
8. Check plumbing specialties and verify proper settings, adjustments, and operation.
3.10 FIELD QUALITY CONTROL
A. Perform the following tests and inspections:
1. Piping Inspections:
a. Do not enclose, cover, or put piping into operation until it has been inspected and approved by authorities having jurisdiction.
b. During installation, notify authorities having jurisdiction at least one day before inspection must be made. Perform tests specified below in presence of authorities having jurisdiction:
1) Roughing-in Inspection: Arrange for inspection of piping before concealing or closing in after roughing in and before setting fixtures.
HENRY MOUNTAIN FIELD STATION REPLACEMENT 221116 - 9
2) Final Inspection: Arrange for authorities having jurisdiction to observe tests specified in "Piping Tests" Subparagraph below and to ensure compliance with requirements.
c. Reinspection: If authorities having jurisdiction find that piping will not pass tests or inspections, make required corrections and arrange for reinspection.
d. Reports: Prepare inspection reports and have them signed by authorities having jurisdiction.
2. Piping Tests:
a. Fill domestic water piping. Check components to determine that they are not air bound and that piping is full of water.
b. Test for leaks and defects in new piping and parts of existing piping that have been altered, extended, or repaired. If testing is performed in segments, submit a separate report for each test, complete with diagram of portion of piping tested.
c. Leave new, altered, extended, or replaced domestic water piping uncovered and unconcealed until it has been tested and approved. Expose work that was covered or concealed before it was tested.
d. Cap and subject piping to static water pressure of 50 psig above operating pressure, without exceeding pressure rating of piping system materials. Isolate test source and allow it to stand for four hours. Leaks and loss in test pressure constitute defects that must be repaired.
e. Repair leaks and defects with new materials, and retest piping or portion thereof until satisfactory results are obtained.
f. Prepare reports for tests and for corrective action required.
B. Domestic water piping will be considered defective if it does not pass tests and inspections.
C. Prepare test and inspection reports.
3.11 CLEANING
A. Clean and disinfect potable domestic water piping as follows:
1. Purge new piping and parts of existing piping that have been altered, extended, or repaired before using.
2. Use purging and disinfecting procedures prescribed by authorities having jurisdiction; if methods are not prescribed, use procedures described in either AWWA C651 or AWWA C652 or follow procedures described below:
a. Flush piping system with clean, potable water until dirty water does not appear at outlets.
b. Fill and isolate system according to either of the following:
1) Fill system or part thereof with water/chlorine solution with at least 50 ppm of chlorine. Isolate with valves and allow to stand for 24 hours.
2) Fill system or part thereof with water/chlorine solution with at least 200 ppm of chlorine. Isolate and allow to stand for three hours.
HENRY MOUNTAIN FIELD STATION REPLACEMENT 221116 - 10
c. Flush system with clean, potable water until no chlorine is in water coming from system after the standing time.
d. Repeat procedures if biological examination shows contamination.
e. Submit water samples in sterile bottles to authorities having jurisdiction.
B. Prepare and submit reports of purging and disinfecting activities. Include copies of water-sample approvals from authorities having jurisdiction.
C. Clean interior of domestic water piping system. Remove dirt and debris as work progresses.
END OF SECTION 221116
| PART 1 - GENERAL |
| 1.1 SUMMARY |
| A. Section Includes: |
| 1. CPVC piping. |
| 2. PEX tube and fittings. |
| 3. PVC pipe and fittings. |
| 4. Piping joining materials. |
| 5. Transition fittings. |
| 6. Dielectric fittings. |
| B. Related Requirements: |
| 1. Section 331415 "Site Water Distribution Piping" for water-service piping outside the building from source to the point where water-service piping enters the building. |
| 1.2 ACTION SUBMITTALS |
| A. Product Data: For transition fittings and dielectric fittings. |
| B. Sustainable Design Submittals: |
| 1.3 INFORMATIONAL SUBMITTALS |
| A. System purging and disinfecting activities report. |
| B. Field quality-control reports. |
| 1.4 WARRANTY |
| A. Polypropylene Piping (PP-R) Manufacturer's Warranty: Manufacturer agrees to repair or replace PP-R pipe and fittings that fail in materials or workmanship within 10 years from date of Substantial Completion. |
| 1. Warranty is to cover labor and material costs of repairing and/or replacing defective materials and repairing any incidental damage caused by failure of the piping system due to defects in materials or manufacturing. |
| 2. Warranty is to be in effect only upon submission by the Contractor to the manufacturer of valid pressure/leak documentation indicating that the system was tested and passed the manufacturer's pressure/leak test. |
| PART 2 - PRODUCTS |
| 2.1 PIPING MATERIALS |
| A. Comply with requirements in "Piping Schedule" Article for applications of pipe, tube, fitting materials, and joining methods for specific services, service locations, and pipe sizes. |
| B. Potable-water piping and components shall comply with NSF 14, NSF 61, and NSF 372. |
| 2.2 CPVC PIPING |
| A. CPVC Pipe: ASTM F441/F441M, with wall thickness as indicated in "Piping Applications" Article. |
| 1. CPVC Socket Fittings: ASTM F438 for Schedule 40. |
| 2. CPVC Threaded Fittings: ASTM F437, Schedule 80. |
| B. CPVC Piping System: ASTM D2846/D2846M, SDR 11, pipe and socket fittings. |
| C. CPVC Tubing System: ASTM D2846/D2846M, SDR 11, tube and socket fittings. |
| 2.3 PEX TUBE AND FITTINGS |
| A. Tube Material: PEX plastic according to ASTM F876 and ASTM F877. |
| B. Fittings: ASTM F1807, metal insert and copper crimp rings or ASTM F1960, cold expansion fittings and reinforcing rings. |
| C. Push-Fit Fittings: ASSE 1061, push-fit fittings. |
| D. Manifold: Multiple-outlet, plastic or corrosion-resistant-metal assembly complying with ASTM F876; with plastic or corrosion-resistant-metal valve for each outlet. |
| 2.4 PVC PIPE AND FITTINGS |
| A. PVC Pipe: ASTM D1785, with wall thickness as indicated in "Piping Applications" Article. |
| B. PVC Socket Fittings: ASTM D2466 for Schedule 40. |
| C. PVC Schedule 80 Threaded Fittings: ASTM D2464. |
| 2.5 PIPING JOINING MATERIALS |
| A. Pipe-Flange Gasket Materials: |
| 1. AWWA C110/A21.10, rubber, flat face, 1/8 inch thick or ASME B16.21, nonmetallic and asbestos free unless otherwise indicated. |
| 2. Full-face or ring type unless otherwise indicated. |
| B. Metal, Pipe-Flange Bolts and Nuts: ASME B18.2.1, carbon steel unless otherwise indicated. |
| C. Solder Filler Metals: ASTM B32, lead-free alloys. |
| D. Flux: ASTM B813, water flushable. |
| E. Brazing Filler Metals: AWS A5.8M/A5.8, BCuP Series, copper-phosphorus alloys for general-duty brazing unless otherwise indicated. |
| F. Solvent Cements for Joining CPVC Piping and Tubing: ASTM F493. |
| G. Solvent Cements for Joining PVC Piping: ASTM D2564. Include primer according to ASTM F656. |
| H. Plastic, Pipe-Flange Gaskets, Bolts, and Nuts: Type and material recommended by piping system manufacturer unless otherwise indicated. |
| 2.6 TRANSITION FITTINGS |
| A. General Requirements: |
| 1. Same size as pipes to be joined. |
| 2. Pressure rating at least equal to pipes to be joined. |
| 3. End connections compatible with pipes to be joined. |
| B. Fitting-Type Transition Couplings: Manufactured piping coupling or specified piping system fitting. |
| C. Plastic-to-Metal Transition Fittings: |
| 1. Description: |
| a. CPVC or PVC one-piece fitting with manufacturer's Schedule 80 equivalent dimensions. |
| b. One end with threaded brass insert and one solvent-cement-socket or threaded end. |
| D. Plastic-to-Metal Transition Unions: |
| 1. Description: |
| a. CPVC or PVC four-part union. |
| b. Brass or stainless steel threaded end. |
| c. Solvent-cement-joint or threaded plastic end. |
| d. Rubber O-ring. |
| e. Union nut. |
| PART 3 - EXECUTION |
| 3.1 PIPING APPLICATIONS |
| A. Transition and special fittings with pressure ratings at least equal to piping rating may be used in applications below unless otherwise indicated. |
| B. Flanges and unions may be used for aboveground piping joints unless otherwise indicated. |
| C. Fitting Option: Extruded-tee connections and brazed joints may be used on aboveground copper tubing. |
| D. Under-building-slab, domestic water, building-service piping, NPS 3 and smaller, shall be the following: |
| 1. PVC, Schedule 40; socket fittings; and solvent-cemented joints. |
| E. Under-building-slab, domestic water, building-service piping, NPS 4 to NPS 8 and larger, shall be the following: |
| 1. PVC, Schedule 40; socket fittings; and solvent-cemented joints. |
| F. Under-building-slab, domestic water piping, NPS 2 and smaller, shall be the following: |
| 1. PVC, Schedule 40; socket fittings; and solvent-cemented joints. |
| G. Aboveground domestic water piping, NPS 2 and smaller, shall be one of the following: |
| 1. CPVC, Schedule 40; socket fittings; and solvent-cemented joints. |
| 2. CPVC, Schedule 80 pipe; CPVC, Schedule 80 threaded fittings; and threaded joints. |
| 3. CPVC Tubing System: CPVC tube; CPVC socket fittings; and solvent-cemented joints. NPS 1-1/2 and NPS 2 CPVC pipe with CPVC socket fittings may be used instead of tubing. |
| 4. PEX tube, NPS 1 and smaller. |
| a. Fittings for PEX tube: |
| 1) ASTM F1807, metal insert and copper crimp rings. |
| 2) ASTM F1960, cold expansion fittings and reinforcing rings. |
| 3) ASSE 1061, push-fit fittings. |
5. PVC, Schedule 40; socket fittings; and solvent-cemented joints.
| 3.2 EARTHWORK |
| A. Comply with requirements in Section 312000 "Earth Moving" for excavating, trenching, and backfilling. |
| 3.3 INSTALLATION OF PIPING |
| A. Drawing plans, schematics, and diagrams indicate general location and arrangement of domestic water piping. Indicated locations and arrangements are used to size pipe and calculate friction loss, expansion, and other design considerations. Install ... |
| B. Install valves according to the following: |
| 1. Section 220523.12 "Ball Valves for Plumbing Piping." |
| 2. Section 220523.13 "Butterfly Valves for Plumbing Piping." |
| 3. Section 220523.14 "Check Valves for Plumbing Piping." |
| 4. Section 220523.15 "Gate Valves for Plumbing Piping." |
| C. Install water-pressure-reducing valves downstream from shutoff valves. Comply with requirements for pressure-reducing valves in Section 221119 "Domestic Water Piping Specialties." |
| D. Install domestic water piping level without pitch and plumb. |
| E. Rough-in domestic water piping for water-meter installation according to utility company's requirements. |
| F. Install seismic restraints on piping. Comply with requirements for seismic-restraint devices in Section 220548 "Vibration and Seismic Controls for Plumbing Piping and Equipment." |
| G. Install piping concealed from view and protected from physical contact by building occupants unless otherwise indicated and except in equipment rooms and service areas. |
| H. Install piping indicated to be exposed and piping in equipment rooms and service areas at right angles or parallel to building walls. Diagonal runs are prohibited unless specifically indicated otherwise. |
| I. Install piping above accessible ceilings to allow sufficient space for ceiling panel removal, and coordinate with other services occupying that space. |
| J. Install piping to permit valve servicing. |
| K. Install nipples, unions, special fittings, and valves with pressure ratings the same as or higher than the system pressure rating used in applications below unless otherwise indicated. |
| L. Install piping free of sags and bends. |
| M. Install fittings for changes in direction and branch connections. |
| N. Install PEX tubing with loop at each change of direction of more than 90 degrees. |
| O. Install pressure gauges on suction and discharge piping for each plumbing pump and packaged booster pump. Comply with requirements for pressure gauges in Section 220519 "Meters and Gages for Plumbing Piping." |
| P. Install thermostats in hot-water circulation piping. Comply with requirements for thermostats in Section 221123 "Domestic Water Pumps." |
| Q. Install thermometers on inlet and outlet piping from each water heater. Comply with requirements for thermometers in Section 220519 "Meters and Gages for Plumbing Piping." |
| R. Install sleeves for piping penetrations of walls, ceilings, and floors. Comply with requirements for sleeves specified in Section 220517 "Sleeves and Sleeve Seals for Plumbing Piping." |
| S. Install sleeve seals for piping penetrations of concrete walls and slabs. Comply with requirements for sleeve seals specified in Section 220517 "Sleeves and Sleeve Seals for Plumbing Piping." |
| T. Install escutcheons for piping penetrations of walls, ceilings, and floors. Comply with requirements for escutcheons specified in Section 220518 "Escutcheons for Plumbing Piping." |
| 3.4 JOINT CONSTRUCTION |
| A. Ream ends of pipes and tubes and remove burrs. Bevel plain ends of steel pipe. |
| B. Remove scale, slag, dirt, and debris from inside and outside of pipes, tubes, and fittings before assembly. |
| C. Threaded Joints: Thread pipe with tapered pipe threads according to ASME B1.20.1. Cut threads full and clean using sharp dies. Ream threaded pipe ends to remove burrs and restore full ID. Join pipe fittings and valves as follows: |
| 1. Apply appropriate tape or thread compound to external pipe threads. |
| 2. Damaged Threads: Do not use pipe or pipe fittings with threads that are corroded or damaged. |
| D. Flanged Joints: Select appropriate asbestos-free, nonmetallic gasket material in size, type, and thickness suitable for domestic water service. Join flanges with gasket and bolts according to ASME B31.9. |
| E. Joint Construction for Solvent-Cemented Plastic Piping: Clean and dry joining surfaces. Join pipe and fittings according to the following: |
| 1. Comply with ASTM F402 for safe-handling practice of cleaners, primers, and solvent cements. Apply primer. |
| 2. CPVC Piping: Join according to ASTM D2846/D2846M Appendix. |
| 3. PVC Piping: Join according to ASTM D2855. |
| F. Joints for PEX Tubing, ASTM: Join according to ASTM F1807 for metal insert and copper crimp ring fittings and ASTM F1960 for cold expansion fittings and reinforcing rings. |
| G. Joints for PEX Tubing, ASSE: Join according to ASSE 1061 for push-fit fittings. |
| H. Joints for Dissimilar-Material Piping: Make joints using adapters compatible with materials of both piping systems. |
| 3.5 INSTALLATION OF TRANSITION FITTINGS |
| A. Install transition couplings at joints of dissimilar piping. |
| B. Transition Fittings in Underground Domestic Water Piping: |
| 1. Fittings for NPS 1-1/2 and Smaller: Fitting-type coupling. |
| 2. Fittings for NPS 2 and Larger: Sleeve-type coupling. |
C. Transition Fittings in Aboveground Domestic Water Piping NPS 2 and Smaller: Plastic-to-metal transition fittings or unions.
| 3.6 INSTALLATION OF HANGERS AND SUPPORTS |
| A. Comply with requirements for seismic-restraint devices in Section 220548 "Vibration and Seismic Controls for Plumbing Piping and Equipment." |
| B. Comply with requirements for hangers, supports, and anchor devices in Section 220529 "Hangers and Supports for Plumbing Piping and Equipment." |
| C. Install vinyl-coated hangers for CPVC and PVC piping, with maximum horizontal spacing and minimum rod diameters, to comply with manufacturer's written instructions, locally enforced codes, and authorities having jurisdiction requirements, whichever... |
| D. Install vinyl-coated hangers for PEX tubing, with maximum horizontal spacing and minimum rod diameters, to comply with manufacturer's written instructions, locally enforced codes, and authorities having jurisdiction requirements, whichever are most... |
| E. Support horizontal piping within 12 inches of each fitting. |
| F. Support vertical runs of CPVC and PVC piping to comply with manufacturer's written instructions, locally enforced codes, and authorities having jurisdiction requirements, whichever are most stringent. |
| G. Support vertical runs of PEX tubing to comply with manufacturer's written instructions, locally enforced codes, and authorities having jurisdiction requirements, whichever are most stringent. |
| 3.7 CONNECTIONS |
| A. Drawings indicate general arrangement of piping, fittings, and specialties. |
| B. When installing piping adjacent to equipment and machines, allow space for service and maintenance. |
| C. Connect domestic water piping to exterior water-service piping. Use transition fitting to join dissimilar piping materials. |
| D. Connect domestic water piping to water-service piping with shutoff valve; extend and connect to the following: |
| 1. Water Heaters: Cold-water inlet and hot-water outlet piping in sizes indicated, but not smaller than sizes of water heater connections. |
| 2. Plumbing Fixtures: Cold- and hot-water-supply piping in sizes indicated, but not smaller than that required by plumbing code. |
| 3. Equipment: Cold- and hot-water-supply piping as indicated, but not smaller than equipment connections. Provide shutoff valve and union for each connection. Use flanges instead of unions for NPS 2-1/2 and larger. |
| 3.8 IDENTIFICATION |
| A. Identify system components. Comply with requirements for identification materials and installation in Section 220553 "Identification for Plumbing Piping and Equipment." |
| 3.9 ADJUSTING |
| A. Perform the following adjustments before operation: |
| 1. Close drain valves, hydrants, and hose bibbs. |
| 2. Open shutoff valves to fully open position. |
| 3. Open throttling valves to proper setting. |
| 4. Adjust balancing valves in hot-water-circulation return piping to provide adequate flow. |
| a. Manually adjust ball-type balancing valves in hot-water-circulation return piping to provide hot-water flow in each branch. |
| b. Adjust calibrated balancing valves to flows indicated. |
| 5. Remove plugs used during testing of piping and for temporary sealing of piping during installation. |
| 6. Remove and clean strainer screens. Close drain valves and replace drain plugs. |
| 7. Remove filter cartridges from housings and verify that cartridges are as specified for application where used and are clean and ready for use. |
| 8. Check plumbing specialties and verify proper settings, adjustments, and operation. |
| 3.10 FIELD QUALITY CONTROL |
| A. Perform the following tests and inspections: |
| 1. Piping Inspections: |
| a. Do not enclose, cover, or put piping into operation until it has been inspected and approved by authorities having jurisdiction. |
| b. During installation, notify authorities having jurisdiction at least one day before inspection must be made. Perform tests specified below in presence of authorities having jurisdiction: |
| 1) Roughing-in Inspection: Arrange for inspection of piping before concealing or closing in after roughing in and before setting fixtures. |
| 2) Final Inspection: Arrange for authorities having jurisdiction to observe tests specified in "Piping Tests" Subparagraph below and to ensure compliance with requirements. |
| c. Reinspection: If authorities having jurisdiction find that piping will not pass tests or inspections, make required corrections and arrange for reinspection. |
| d. Reports: Prepare inspection reports and have them signed by authorities having jurisdiction. |
| 2. Piping Tests: |
| a. Fill domestic water piping. Check components to determine that they are not air bound and that piping is full of water. |
| b. Test for leaks and defects in new piping and parts of existing piping that have been altered, extended, or repaired. If testing is performed in segments, submit a separate report for each test, complete with diagram of portion of piping tested. |
| c. Leave new, altered, extended, or replaced domestic water piping uncovered and unconcealed until it has been tested and approved. Expose work that was covered or concealed before it was tested. |
| d. Cap and subject piping to static water pressure of 50 psig above operating pressure, without exceeding pressure rating of piping system materials. Isolate test source and allow it to stand for four hours. Leaks and loss in test pressure constitute ... |
| e. Repair leaks and defects with new materials, and retest piping or portion thereof until satisfactory results are obtained. |
| f. Prepare reports for tests and for corrective action required. |
| B. Domestic water piping will be considered defective if it does not pass tests and inspections. |
| C. Prepare test and inspection reports. |
| 3.11 CLEANING |
| A. Clean and disinfect potable domestic water piping as follows: |
| 1. Purge new piping and parts of existing piping that have been altered, extended, or repaired before using. |
| 2. Use purging and disinfecting procedures prescribed by authorities having jurisdiction; if methods are not prescribed, use procedures described in either AWWA C651 or AWWA C652 or follow procedures described below: |
| a. Flush piping system with clean, potable water until dirty water does not appear at outlets. |
| b. Fill and isolate system according to either of the following: |
| 1) Fill system or part thereof with water/chlorine solution with at least 50 ppm of chlorine. Isolate with valves and allow to stand for 24 hours. |
| 2) Fill system or part thereof with water/chlorine solution with at least 200 ppm of chlorine. Isolate and allow to stand for three hours. |
| c. Flush system with clean, potable water until no chlorine is in water coming from system after the standing time. |
| d. Repeat procedures if biological examination shows contamination. |
| e. Submit water samples in sterile bottles to authorities having jurisdiction. |
| B. Prepare and submit reports of purging and disinfecting activities. Include copies of water-sample approvals from authorities having jurisdiction. |
| C. Clean interior of domestic water piping system. Remove dirt and debris as work progresses. |
File details come from the government source that posted it. Updated .