15410 - Water Distribution Piping and Equiment-26July2011.pdf

KRSM: 062067, 062068, 062069, 072070 B-2005, B-2013, B-2024 Section 15410 Water dist. piping

WATER DISTRIBUTION PIPING AND EQUIPMENT 15410 - 1

DIVISION 15 - MECHANICAL

SECTION 15410 - WATER DISTRIBUTION PIPING AND EQUIPMENT

PART I - GENERAL

1.01 RELATED DOCUMENTS:

A. Drawings and general provisions of Contract, including General and Supplementary Conditions and Division-1 Specification sections, apply to work of this section.

1.02 SUMMARY:

A. This Section specifies the water distribution piping system, including potable cold, hot, and re-circulated hot water piping, fittings, and specialties within the building connecting to existing water piping in existing building and connecting to new equipment.

B. Water Supply Systems:

1. Domestic Water

2. Rough-in and Connect

3. Deionized and Reverse Osmosis Water

C. Related Sections:

1. Separate sections in Division 15 specify Basic Piping Materials and Methods, Hangers and Supports, Expansion Compensation, piping system identification materials and requirements, general duty valves, pipe insulation and plumbing fixtures and equipment.

D. Remove existing water distribution piping rendered obsolete by this work. See Section

15005 - Demolition.

1.03 QUALITY ASSURANCE:

A. Manufacturer's Qualifications:

1. Firms regularly engaged in the manufacture of plumbing piping products and equipment of types, materials and sizes required, whose products have been in service for not less than five years.

B. Installer's Qualifications:

1. Firm with at least three years history of successful experience on projects of similar nature.

2. Licensed as a firm in the Contractor state of origin.

3. Have a publicly registered bonding capacity of sufficient amount to cover this work and all other work in progress by the Contractor.

4. All workmen employed on the project to carry state licenses as journeyman or apprentice pipe fitters with additional certification for welders.

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1.04 SUBMITTALS:

A. Product Data: Submit manufacturers technical literature indicating source, brand, type, model, performance characteristics, installation instructions, etc. Color chart for finished surfaces and fixtures.

B. Record Drawings: See Section 15000 - General Mechanical Requirements.

C. Operation And Maintenance Information: Provide information for all equipment including a comprehensive system operating description.

1.05 REFERENCES:

A. Codes and Standards: Comply with applicable sections, follow recommended practices.

1. State Boiler and Pressure Vessel Regulations

2. ASME Codes for Boilers and Pressure Vessels

3. International Plumbing Code

4. International Mechanical Code

5. International Building Code

6. ASHRAE/ASPE Handbooks

1.06 DELIVERY, STORAGE, AND HANDLING:

A. Store pipe in a manner to prevent sagging and bending.

1.07 SEQUENCING AND SCHEDULING:

A. Coordinate the installation of pipe sleeves for foundation wall and floor penetrations.

PART II - PRODUCTS

2.01 PIPE AND FITTINGS:

A. Domestic Water Pipe: (except below slab/grade)

1. Pipe Sizes 4" and Smaller: Copper tubing. Conform to ASTM B88, Type L, hard temper, copper tube; ANSI B16.22 streamlined pattern wrought-copper fittings, with soldered joints using 95-5 tin antimony solder or non-lead bearing solders such at "Silvabrite."

B. Deionized Water Piping, Fittings and Valves:

1. Pipe and fittings:

a. PVDF: High purity system piping, pipe manufactured to Schedule 80 iron pipe dimensions, manufactured with 100% pure virgin un-pigmented PVDF (Polyvinylidene Fluoride) resin, meeting ASTM D3222, pipe to meet dimensional tolerances of ASTM D2447. Fittings: Fused Joints:

Fittings to be manufactured to Schedule 80 wall thickness from virgin, un-pigmented PVDF (Polyvinylidene Fluoride) resin, meeting ASTM D3222, fittings to be complete with face seal, each fitting to be individually bagged.

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b. Low-extractable (LXT) Piping: Ultra-pure piping system with solvent-cemented joints, produced from PVC Cell Classification 12343, pipe manufactured to Schedule 80 iron pipe dimensions, piping shall meet ASTM D1785 and fittings shall meet ASTM D2467. Not allowed in plenum spaces without a listed and approved fire wrap

2. Support all plastic water piping with a continuous 2" x 2" x 1/8" angle iron steel channel. Provide a complete fire rated encasement system for plastic piping to cover pipe before setting in channel.

C. Process Piping, Fittings and Valves:

a. CPVC schedule 80 solid core pressure piping.

2.02 VALVES:

A. Ball, butterfly, check, and drain valves are specified in Section 15100 - Valves.

B. For Deionized and Reverse Osmosis water: Ball valves manufactured from virgin, un-pigmented PVDF (Polyvinylidene Fluoride) or Low-extractable (LXT) to be fully compatible with the piping system, test to 150 psi @ 73ΕF, each valve to be individually bagged and sealed.

C. For process piping: Ball valves manufactured with stainless steel bodies, ball, stem and with Teflon seat, or PVDF as specified for deionized water system.

2.03 PIPING SPECIALTIES:

A. Water Hammer Arresters: Bellows type, with stainless steel casing and bellows, pressure rated for 250 psi, tested and certified in accordance with PDI Standard WH-201.

1. Approved Manufacturers:

a. Zurn

b. Smith

c. Watts

d. Amtrol

e. Tyler

B. Backflow Preventers: Reduced pressure principle assembly consisting of shutoff valves on inlet and outlet, and strainer on inlet. Assemblies shall include test cocks, and pressure-differential relief valve located between two positive seating check valves, and comply with requirements of ASSE Standard 1013.

a. Watts Series 909 (Preferred)

b. Conbraco

c. Wilkins

C. Strainers: Watts No. 777, WWP 250 psi at 210o

F, cast bronze body, threaded, solid retainer cap, 20 mesh stainless steel screen (except 3" to have 3/64" perforated screen).

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a. Watts Series 777.

b. Conbraco

c. Wilkins

D. Pressure Reducing Valves 3" and Smaller:

1. Description: Hydraulically operated, pilot actuated automatic control valve for pressure reducing service, main valve shall consist of two parts: a stainless steel body and EPDM liner (control element), the valve shall automatically control the downstream pressure from no flow to full open without regard to changes in inlet pressure to a predetermined set point (see plans). Minimum range ability shall be 500:1 based on capacity at flowing pressure conditions.

a. Body: 18-8 (304L) stainless steel.

b. Liner: EPDM with 18-8 (304) stainless steel retainer.

c. Pilot: Body of pilot to be ASTM B62 Bronze, with 316 stainless steel spring cover, and all wetted parts to be bronze/stainless steel and Buna® N.

d. Size: Select proper size for maximum flow rate and inlet and outlet pressures indicated on the drawings.

2. Approved Manufacturer:

a. Cla-Val “Roll Seal” Model 790-01

E. Swing Check Valve: See valve section

F.

Hose Bibb:

1. (HB-1) Fixture:

a. Chrome plated brass, removable key, vacuum breaker, 3/4" inlet and outlet, provide isolation valve upstream of bibb.

b. Approved Manufacturers:

(1) Chicago No. 998

(2) T & S Brass

G. Trap Primer:

1. Fully automatic, all brass trap primer valve, activated by a drop in building water pressure, no adjustment required, for one (1) to four (4) traps with distribution unit.

2. Approved Manufacturers:

a. PPP inc. model PR-500

b. Sioux Chief.

2.04 DOMESTIC WATER EXPANSION TANKS: (ET)

A. Extent of Work: Tanks as indicated on drawings, clarify size and model, provide related piping valves, concrete pad or overhead suspension, line to drain, relief valve downstream of PRV=s. Change air side to local water system static pressure.

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B. Expansion Tanks: Factory built unit pressurized diaphragm type, ASME stamped for 125 psig working pressure. Steel tank with neoprene diaphragm and polypropylene liner for nom-metallic isolation of water from steel. Fit tank with air charging valve and threaded water connection. NSF approved.

1. Amtrol “ST” Series

2. Bell & Gossett

3. Taco

4. Watts

PART III - EXECUTION

3.01 EXAMINATION

A. Verify all dimensions by field measurements. Verify that all water distribution piping may be installed in accordance with pertinent codes and regulations, the original design, and the referenced standards.

B. Examine rough-in requirements for plumbing fixtures and other equipment having water connections to verify actual locations of piping connections prior to installation.

C. Do not proceed until the unsatisfactory conditions have been corrected.

3.02 JOINING PIPES AND FITTINGS:

A. Copper Tubing: Solder joints in accordance with the procedures specified in ANSI B9.1.

B. PVDF Pipe: Joining and installation of PVDF distribution pipe and fittings shall conform to the manufacturers criteria for fused joints. Install in continuous "V" channel support system.

C. LXT Pipe: Joining and installation of LXT distribution pipe and fittings shall conform to

ASTM D2467 and shall be solvent-cemented with manufacturer recommended cement for ultra-pure applications. Install in continuous "V" channel support system. Install fire wrap around all piping located in a plenum space per fire wrap listing.

3.03 PIPING INSTALLATION:

A. Refer to the separate Division 15 section: General pipes and fittings, for general piping installation instructions.

B. General Locations and Arrangements: Drawings (plans, schematics, and diagrams) indicate the general location and arrangement of the piping systems. Location and arrangement of piping layout take into consideration pipe sizing and friction loss, expansion, pump sizing, and other design considerations. So far as practical, install piping as indicated.

C. Install piping level with no pitch.

D. Install incidental.

3.04 INSTALLATION OF VALVES:

A. Installation requirements for general duty valves are specified in Section 15100.

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B. Valves: Install in locations shown on drawings. Provide isolation valves for branch lines and service to all equipment, shown or not.

C. Check Valves: Install swing check valves on discharge side of each pump, and elsewhere as indicated.

D. Hose Bibbs: Install with vacuum breaker. Each and every hose bibb shall have a ball valve located upstream of its individual hose bibb. Locate ball valve in accessible work space.

3.05 INSTALLATION OF PIPING SPECIALTIES:

A. Install backflow preventers at each connection to mechanical equipment and in compliance with the plumbing code and authority having jurisdiction. Locate in same room as equipment being connected. Pipe relief outlet without valves, to nearest floor drain or as indicated on drawings. Install each backflow preventer no more than 5'-0" above floor.

B. Install pressure regulating valves with inlet and outlet shutoff valves. Install pressure gauge on valve inlet and outlet.

3.06 EQUIPMENT CONNECTIONS:

A. Piping Runouts to Fixtures: Provide hot and cold water piping runouts to fixtures of sizes indicated, but in no case smaller than required by Plumbing Code.

B. Mechanical Equipment Connections: Connect hot and cold water piping system to mechanical equipment as indicated. Provide shutoff valve and union for each connection, provide drain valve on drain connection. For connections 2-1/2" and larger, use flanges instead of unions.

3.07 FIELD QUALITY CONTROL:

A. Inspections:

1. Do not enclose, cover, or put water distribution piping system into operation until it has been inspected and approved by the authority having jurisdiction.

2. During the progress of the installation, notify the plumbing official having jurisdiction, at least 24 hours prior to the time such inspection must be made.

Perform tests specified below in the presence of the plumbing official.

3. Rough-in Inspection: Arrange for inspection of the piping system before concealed or closed-in after system is roughed-in, and prior to setting fixtures.

4. Final Inspection: Arrange for a final inspection by the plumbing official to observe the tests specified below and to insure compliance with the requirements of the plumbing code.

5. Re-inspection: Whenever the plumbing official finds that the piping system will not pass the test or inspection, make the required corrections and arrange for reinspection by the plumbing official.

6. Reports: Prepare inspection reports, signed by the plumbing official.

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B. Test all water distribution piping systems for leaks and defects. If testing is performed in segments, submit a separate report for each test, complete with a diagram of the portion of the system tested.

C. Leave all water distribution piping uncovered and unconcealed until it has been tested and approved. Expose all such work for testing that has been covered or concealed before it has been tested and approved.

D. Cap the piping system and subject to a static water pressure of 50 psig above the operating pressure without exceeding the pressure rating of the piping system materials.

Isolate the test source and allow system to stand for a period of 4 hours. Leaks and loss in test pressure constitute defects which must be repaired.

E. Repair all leaks and defects using new materials and retest system or portion thereof until satisfactory results are obtained.

F. Prepare reports for all tests and required corrective action.

3.08 ADJUSTING AND CLEANING:

A. Cleaning and Disinfecting:

1. Purge all water distribution piping systems.

2. Follow AWWA guidelines. Thoroughly sterilize the entire domestic water system with a solution containing not more than 50 parts per million of available chlorine.

Introduce the chlorinating materials into the system in a manner approved by the Owner's representative. Allow the sterilization solution to remain in the system for a period of 24 hours, during which time, open and close all valves and faucets several times. After sterilization, flush the solution from the system with clean water until the residual chlorine content is not greater than 0.2 parts per million.

Water system will not be accepted until a negative bacteriological test is made on water taken from the system. Repeat dosing as necessary until such negative test is accomplished.

B. Reports:

1. Prepare reports for all purging and disinfecting activities.

3.09 INSTRUCTION OF OWNER'S PERSONNEL: Participate in specified instruction. See Section

15000 - General Mechanical Requirements.

END OF SECTION 15410

D. Remove existing water distribution piping rendered obsolete by this work. See Section 15005 - Demolition.

3.09 INSTRUCTION OF OWNER'S PERSONNEL: Participate in specified instruction. See Section 15000 - General Mechanical Requirements.