Section 15400 PLUMBING

Section 15400

PLUMBING

PART 1- GENERAL

1.1 SCOPE

A. This section covers the furnishing and installation of materials, appliances, fixtures, equipment, and appurtenances associated with the plumbing systems as specified herein and as indicated on the Drawings. Additional requirements for plumbing systems shall be as indicated in the schedules on the Drawings. Suitable connections shall be provided for each fixture, piece of equipment, and appurtenance. This section shall be used in conjunction with sections 15430, Plumbing Specialties and 15440, Plumbing Fixtures. If conflicting information is in sections 15430, Plumbing Specialties, or 15440, Plumbing Fixtures, they shall take precedence over this specification.

B. Pipe materials, valves, thermal insulation, and pipe supports which are not an integral part of the fixture or piece of equipment and are not specified herein are covered in other sections.

1.2 GENERAL

A. Equipment furnished and installed under this section shall be fabricated, assembled, erected, and placed in proper operating condition in full conformity with the Drawings, Specifications, engineering data, instructions, and recommendations of the equipment manufacturer unless exceptions are noted by ENGINEER.

B. Coordination: CONTRACTOR shall verify that each component of the plumbing system is compatible with all other parts of the system; that all piping, fixtures, and appurtenances are appropriate; and that all devices necessary for a properly functioning system have been provided.

1. Where two or more units of the same class of equipment are required, they shall be the product of a single manufacturer; however, all the component parts of the system need not be the products of one manufacturer.

2. Each manufacturer of automatic water softener units, shall have a local service center, or with written consent of ENGINEER, shall be able to provide service from other locations within 24 hours. The service center shall be equipped and staffed to service the system and shall maintain a local parts supply. Information on equipment manufacturers' representatives shall be included with the submittals.

3. Where several manufacturers' names have been listed in this section as possible suppliers, only the products of the first manufacturer listed have been checked for size, functions, and features.

C. General Equipment Stipulations: The General Equipment Stipulations shall apply to all equipment and materials provided under this section. If requirements in this specification differ from those in the General Equipment Stipulations, the requirements specified herein shall take precedence.

D. Governing Standards: Except as modified or supplemented herein, all Work covered by this section shall be performed in accordance with all applicable municipal codes and ordinances, laws, and regulations. In case of a conflict between this section and any state law or local ordinance, the latter shall govern.

All Work shall conform to the requirements of AGA, ASTM, NFPA, and UL safety requirements.

E. Power Supply: Unless otherwise specified, power supply to equipment with motors shall be as indicated on the Drawings. Power supply for controls shall be 120 V, 60 Hz, single phase unless otherwise required for a properly operating system.

F. Metal Thickness: Metal thicknesses and gauges specified herein are minimum requirements. Gauges refer to US Standard gauge.

G. Mechanical Identification: Mechanical identification shall conform to the requirements of Section 11005, Equipment: Basic requirements.

1.3 SUBMITTALS.

A. Drawings and Data: Complete assembly and installation drawings, and wiring and schematic diagrams, together with detailed specifications and data covering materials, parts, devices, and accessories forming a part of the equipment furnished, shall be submitted. Device tag numbers indicated on the Drawings shall be referenced on the wiring and schematic diagrams where applicable. The data and specifications to be submitted for each unit shall include, but shall not be limited to, the following:

Equipment, Piping Accessories, and Appurtenances

Name of manufacturer. Type and model.

Construction materials, thicknesses, and finishes. Capacities.

Pressure and temperature ratings. Overall dimensions.

Piping connection sizes and locations. Net weight.

Horsepower [kW]. Power requirements.

Wiring diagrams.

Plumbing Fixtures

Name of manufacturer. Type and model.

Construction materials, thicknesses, and finishes. Water consumption data.

Overall dimensions. Rough-in dimensions.

Piping connection sizes and locations. Net weight.

B. Operations and Maintenance Data and Manuals: Adequate operation and maintenance information shall be supplied as required in Section 01783, Vendor Equipment Manual. Operation and Maintenance manuals shall be submitted in accordance with Section 01783, Vendor Equipment Manuals.

Operation and Maintenance Manuals are required for faucets and flush valves, electric water coolers, food waste disposers, water heaters, circulating pumps, expansion tanks, automatic water softener units, neutralization tanks, and oil interceptors.

1.4 QUALITY ASSURANCE.

A. Welding Qualifications: All welding procedures and welding operators shall be qualified by an independent testing laboratory in accordance with the applicable provisions of AWS Standard Qualification Procedures. All procedure and operator qualifications shall be in written form and subject to ENGINEER’s review. Accurate records of operator and procedure qualifications shall be maintained by CONTRACTOR and made available to ENGINEER upon request.

B. Manufacturer's Experience: Unless the equipment manufacturer is specifically named in this section, the manufacturer shall have furnished equipment of the type and size specified which has been in successful operation for not less than the past 5 years.

C. Construction: Plumbing fixtures shall be constructed in accordance with the following standards:

Enameled Cast Iron ANSI/ASME A112.19.1M Vitreous China ANSI/ASME A112.19.2M Stainless Steel ANSI/ASME A112.19.3M Faucets ANSI/NSF 61

Electric water coolers shall be UL listed and certified in accordance with the Air Conditioning and Refrigeration Institute (ARI) Standard 1010. All materials in contact with water shall comply with the Safe Drinking Water Act of 1986, and the Lead Contamination Control Act of 1988. In addition, all plumbing fittings and fixtures intended to convey or dispense water for human consumption shall comply with the requirements of ANSI/NSF 61, Annex G for low lead.

1.5 DELIVERY, STORAGE, AND HANDLING

A. Shipping, handling, and storage shall be in accordance with Section 01660, Shipping, Storage, and Handling Requirements.

1.6 EXTRA MATERIALS

A. Extra materials shall be furnished for each type and size of plumbing fixture or equipment as required, in the quantities indicated below.

Part Number Required Faucet washer cartridge and O-ring kits 1 per 5 fixtures Water heater relief valves 1 per heater

Extra materials shall be packaged with labels indicating the contents of each package. Each label shall indicate manufacturer's name, equipment name, part nomenclature, part number, address of nearest distributor, and current list price. Extra materials shall be delivered to OCSD as directed.

Extra materials subject to deterioration such as ferrous metal items and electrical components shall be properly protected by lubricants or desiccants and encapsulated in hermetically sealed plastic wrapping.

PART 2- PRODUCTS

2.1 SERVICE CONDITIONS

A. All plumbing fixtures and equipment shall be designed and selected to meet the specified conditions.

2.2 PERFORMANCE AND DESIGN REQUIREMENTS

A. All fixtures and equipment shall be designed to meet the performance and design conditions specified herein and indicated on the Drawings.

B. Dimensional Restrictions: Layout dimensions will vary between manufacturers and the layout area indicated on the Drawings is based on typical values. CONTRACTOR shall review the Contract Drawings, the manufacturer’s layout drawings, and installation requirements and shall make any modifications required for proper installation subject to acceptance by ENGINEER.

2.3 ACCEPTABLE MANUFACTURERS

A. Acceptable manufacturers shall be as listed in the respective product description paragraphs.

2.4 MANUFACTURE AND FABRICATION

A. Anchor Bolts and Expansion Anchors: Anchor bolts, expansion anchors, nuts, and washers shall be as indicated in Section 05500, Miscellaneous Metalwork, unless otherwise indicated on the Drawings.

B. Surface Preparation: All iron and steel surfaces, except motors and speed reducers, shall be shop cleaned by sandblasting or equivalent, in strict conformance with the paint manufacturer’s recommendations. All mill scale, rust, and contaminants shall be removed before shop primer is applied.

C. Shop Painting: All steel and iron surfaces shall be protected by suitable coatings applied in the shop. Surfaces which will be inaccessible after assembly shall be protected for the life of the equipment. Coatings shall be suitable for the environment where the equipment is installed. Exposed surfaces shall be finished, thoroughly cleaned, and filled as necessary to provide a smooth, uniform base for painting. Electric motors, speed reducers, starters, and other self-contained or enclosed components shall be shop primed or finished with an oil-resistant enamel or universal type primer suitable for top coating in the field with a universal primer and aliphatic polyurethane system.

1. Surfaces to be coated after installation shall be prepared for painting as recommended by the paint manufacturer for the intended service, and then shop painted with one or more coats of the specified primer.

2. Surface finish damaged during installation shall be repaired to the satisfaction of ENGINEER. Field painting shall conform to the requirements of Section 09800, Protective Coating.

D. Equipment Bases: Unless otherwise indicated or specified, all equipment shall be installed on concrete bases at least 6 inches high. Each unit and its drive assembly shall be supported on a single baseplate of neat design. Baseplates shall have pads for anchoring all components. Baseplates will be anchored to the concrete base with suitable anchor bolts.

E. Special Tools and Accessories: Equipment requiring periodic repair and adjustment shall be furnished complete with all special tools, instruments, and accessories required for proper maintenance. Equipment requiring special devices for lifting or handling shall be furnished complete with those devices.

F. Piping Systems: Unless otherwise specified herein, piping system materials shall be as specified in other sections.

G. Valves: Unless otherwise specified herein, valves indicated to be a part of the plumbing systems shall be as specified in other sections.

2.5 WATER SUPPLY PIPING ACCESSORIES

A. Water Hammer Arresters: See Specification section 15430, Plumbing Specialties. B. Trap Primers: See Specification section 15430, Plumbing Specialties.

C. Thermostatic Mixing Valves: Thermostatic mixing valves shall comply with ASSE

1017, shall be bronze or brass body, with stainless steel flow control components, threaded end connections, rotating handle adjustment, lockable setpoint, and hot and cold check stops. Valves shall be suitable for flow ranges and have temperature adjustment ranges as indicated in the schedules. Temperature adjustment range shall be 85 degrees F to 120 degrees F. Accuracy shall be within 3 degrees F of setpoint. Thermostatic mixing valves shall be manufactured by Symmons, Leonard, or Powers, Or

Equal.

D. Vacuum Relief Valves: Vacuum relief valves shall have bronze or brass bodies rated for 200 psig and shall be provided with male threaded inlet connections. The valves shall open at 1/2 inch water column vacuum and shall have a venting capacity of at least 15 cubic feet per minute. Vacuum relief valves shall be Watts Regulator "Model N36", , Or Equal from Fisher.

E. Thermometers: See Specification section 15120, Piping Specialties.

F. Hose Valves and Hose Faucets: Each hose valve shall consist of a valve and hose nipple. Angle valves shall be Class 150 angle type with bronze body, PTFE disc, union bonnet, rising stem, and threaded ends. Hose valves shall be Stockham “B-222T”, Milwaukee, or Powell, Or Equal. Hose valves shall be 1-inch and 1-1/2-inch size as indicated on the drawings, unless otherwise indicated on the Drawings. Hose nipples shall be one piece, cast brass or bronze, with male NPT and male hose thread ends. A cap and chain shall be provided for hose valves in interior locations. Hose nipples shall be Potter-Roemer, Inc. “2830 Series”, Croker Corp., or Elkhart Brass, Or Equal.

G. Wall Hydrants: Wall hydrants shall be freezeproof type with bronze body, polished bronze or chrome plated face, integral vacuum breaker, and removable handle key. Wall hydrants shall be provided with 3/4 inch pipe thread inlet, 3/4 inch male hose thread outlet, and 1” hose thread adapter. Wall hydrants shall be ASSE 1019-B approved. Wall hydrants shall be Smith “Model 5619” or Prier “Model C-634”, Or Equal.

H. Pressure Gauges: See Specification section 17034, Gauges.

2.6 DRAINAGE AND VENT PIPING ACCESSORIES

A. Cleanouts: See Specification section 15430, Plumbing Specialties. B. Bell-Up Drains: Not used.

C. Funnel Receptors: See Specification section 15430, Plumbing Specialties. D. Floor Drains: See Specification section 15430, Plumbing Specialties.

E. Downspout Nozzles: Downspout nozzles shall be cast brass or bronze, and shall be provided with a threaded inlet and a mounting flange. The mounting flange shall be provided with drilled fastening lugs. Downspout nozzles shall be Smith "Model 1770", Josam, or Wade, Or Equal.

F. Modular Trench Drain System: Modular trench drain systems shall be of the types specified herein and indicated on the Drawings. The modular trench drain system shall include pre-sloped channel drain sections, end caps, outlet connections, grating, and all other components and accessories required for a complete installation. Drainage channels and related components shall be constructed of corrosion resistant polymer concrete. The grating shall be suitable for extra heavy traffic. The modular trench drain system shall be manufactured by Smith ACO or ABT Polydrain, Or Equal.

G. Floor Sinks: See Specification section 15430, Plumbing Specialties. H. Backwater Valves: Not used.

I. Vent Flashings: Plumbing vent flashings shall be furnished and installed as indicated in Specification section 15000, Piping, General, and on the Drawings.

2.7 PLUMBING FIXTURES AND ACCESSORIES

A. General: Plumbing fixtures shall be provided with all required supports, fasteners, supply and drain fittings, gaskets, and escutcheons required for a complete installation.

B. Water Closets: See Specification section 15440, Plumbing Fixtures. C. Lavatories: See Specification section 15440, Plumbing Fixtures.

D. Showers: See Specification section 15440, Plumbing Fixtures.

E. Stainless Steel Sinks: See Specification section 15440, Plumbing Fixtures. F. Janitors Sinks: See Specification section 15440, Plumbing Fixtures.

G. Emergency Fixtures: See Specification section 15440, Plumbing Fixtures. H. Wash Fountains: Not used.

I. Food Waste Disposers: Food waste disposer motor size, power supply, and model shall be as indicated on the Drawings. Disposers shall consist of stainless steel grinding chamber, grinding elements, impellers, and stopper. Disposers shall be provided with permanently lubricated bearings, a motor overload protector, a tailpiece, a 5-foot 3-wire power cord with a polarized plug, and a service wrench. Disposers shall be UL listed and shall be manufactured by InSinkErator, Whirlpool, Or Equal.

2.8 PLUMBING EQUIPMENT

A. General: Plumbing equipment shall be provided with all supports, fasteners, fittings, and escutcheons required for a complete installation.

B. Water Heaters and Accessories: Water heaters shall be furnished and installed where indicated on the Drawings. Heater type, storage capacity, recovery rate, energy input, power supply requirements, manufacturer, and model shall be as indicated on the Drawings.

1. Commercial Grade Electric Storage Water Heaters: Not Used

2. Industrial Grade Electric Storage Water Heaters: Not Used

3. Electric Instantaneous Water Heaters: Not Used

4. Commercial Grade Gas-Fired Water Heaters: Gas-fired water heaters shall be commercial, storage type, with a glass-lined tank and a natural or propane gas burner as indicated on the Drawings. Heaters shall be provided with a cold water inlet tube, a magnesium anode, high density fiberglass insulation, a drain valve, a flue damper, and an adjustable thermostat. The heater burner shall be atmospheric type, constructed of aluminized steel, and shall be suitable for a minimum gas supply pressure as indicated on the Drawings. The burner shall be provided with a gas pressure regulator, a manual reset safety shutoff, and an intermittent electronic ignition control system. Burner operation shall be interlocked with the flue damper to prevent burner and pilot ignition until the flue damper is proven open. Heater tanks shall be ASME stamped for a working pressure of at least 125 psig. Heater tanks larger than 70 gallons shall be provided with an inspection port. An ASME rated pressure-temperature relief valve of suitable capacity shall be provided with each heater. Heaters shall be UL, AGA, and NSF listed, and shall meet ASHRAE Standard 90.1 for energy efficiency. The water heaters shall be manufactured by State Industries, A. O. Smith, or Lockinvar, Or Equal.

5. Industrial Grade Gas-Fired Water Heaters: Not Used

6. Water Heater Flues: A complete flue system shall be provided for each gas-fired water heater. Unless otherwise required to maintain the listing of the heater, water heaters utilizing atmospheric burners or fan assisted heaters which operate under a negative flue pressure shall be provided with a Type 'B' flue system. Water heaters utilizing forced draft burners which pressurize the flue shall be provided with a pressurized flue system. Metal flues shall be as specified in Specification section

15890, HVAC: Ductwork.

For applications where under normal conditions the flue gas is expected to be condensing in the flue, and when recommended by the water heater manufacturer, flues shall be schedule 40 PVC pipe with drain, waste, vent (DWV) fittings.

7. Circulating Pump: A circulating pump shall be furnished and installed where indicated on the Drawings. Pump capacity, power requirements, manufacturer, and model shall be as indicated on the Drawings.

The circulating pump shall be an in-line unit with a bronze body, bronze fitted, mechanical seals, a stainless steel or ceramic shaft, and at least 1/2 inch NPT connections. The circulating pump shall be controlled by a 7-day time clock provided with the pump. Initial time clock setting shall energize the pump at 6:00 am and de- energize the pump at 6:00 pm each day. The time clock shall be suitable for a 120 V single phase power supply, and shall have contacts rated for 10 amperes ac. The circulating pump shall be manufactured by Bell & Gossett, Thrush, or Taco, Or Equal.

C. Neutralization Tanks: Neutralization tank volume, connection sizes, manufacturer, and model shall be as indicated on the Drawings.

Neutralization tanks shall be of heavy-duty construction, rotomolded in one piece from polyethylene resins. Inlet, outlet, and vent fittings molded from the same resins as the tank shall be triple-welded to the tank body at the locations indicated on the Drawings. A full diameter extension constructed of the same material as the tank shall be provided where required to raise the access cover to at or just below the floor level as indicated on the Drawings. When indicated on the Drawings, the tank shall be provided with a minimum 17-inch [430 millimeters] bolted manway cover. The cover shall be provided with a 6-inch [150 millimeters] cleanout plug and stainless steel fasteners. The tank shall be filled with hard limestone or marble chunks, 2 to 3 inches [50 to 75 millimeters] in diameter to the level recommended by the manufacturer. Neutralization tanks shall be manufactured by Enfield, Orion, or Town & Country Plastic, Inc., Or Equal.

D. Hose Reels: See Specification section 15430, Plumbing Specialties.

E. Hoses: See Specification section 15430, Plumbing Specialties.

F. Expansion Tanks: Expansion tank capacities, connections, manufacturer, and model shall be as indicated on the Drawings.

Expansion tanks shall be welded steel diaphragm type, ASME tested and stamped for a working pressure of 125 psig, with a flexible diaphragm and a charging valve. Floor- mounted tanks shall be provided with a suitable mounting base. The tanks shall be suitable for use with potable water and shall be factory pre-charged to the pressure indicated in the schedules on the drawings.

G. Automatic W ater Softener Unit: Automatic water softener capacities, connections, manufacturer, and model shall be as indicated on the Drawings.

The automatic water softener unit shall be furnished with resin tank(s), a brine tank, resin, an electric control system, and all other accessories and appurtenances required for a complete automatic system. The water softening unit shall be manufactured by Culligan, Siemens, or equal.

1. Construction: The water softener shall be a factory-assembled, pressure-type consisting of a single unit with resin tank(s) and one brine tank.

Resin tanks shall be constructed of plastic, fiberglass reinforced plastic, or steel with plastic internal liner, and shall be designed for a working pressure of 100 psig. The resin tanks shall be provided with a distribution pipe system to evenly distribute water flow across the media bed and ensure maximum water softening capacity.

The brine tank shall be constructed of high density polyethylene and shall be provided with a cover, a brine fill/discharge valve, an overflow connection, pipe fittings, and required accessories.

2. Media: The softening media shall be high-capacity, sulfonated polystyrene resin that is stable over the entire pH range with good resistance to bead fracture from attrition or shock. The resin shall have a capacity of 30,000 grains of calcium carbonate hardness per cubic foot of resin when regenerated with 15 pounds of salt.

3. Controls: The water softening unit shall be provided with a factory installed, automatic, electrically operated control system as indicated on the Drawings.

Timer based control systems shall consist of an electric timer which shall initiate regeneration cycles at adjustable time periods.

Timer and flow based control systems shall consist of an electric timer in conjunction with a manually adjustable totalizing flow meter. The system shall initiate regeneration cycles based on water volume or fixed time periods.

Sensor based control systems shall be the solid-state sensor type which initiates regeneration cycles based on sensing water hardness.

Softening units with two resin tanks shall automatically alternate to the standby resin tank at the time of regeneration and shall operate that tank until either the timer or the flow meter senses regeneration of that unit.

All controls shall be capable of manual adjustment and operation. All controls shall be suitable for operation on a 120 V single phase power supply. Each unit shall be provided with a 3-wire power cord with polarized plug.

H. Color: Vitreous china, cast iron, enameled steel, and composite plumbing fixtures shall be white unless otherwise indicated. Other plumbing fixtures shall be the manufacturer’s standard color. Plumbing equipment shall have the manufacturer's standard color and finish unless otherwise indicated in the schedules.

I. Electrical: Electrical controls and disconnects shall be furnished and installed under Division 16, except where specified herein. All electrical controls shall have enclosures suitable for the environment and NEMA rating as indicated on the electrical drawings.

PART 3- EXECUTION

3.1 INSPECTION

A. Equipment installed in existing facilities with limited access shall be suitable for being installed through available openings. CONTRACTOR shall field verify existing opening dimensions and other provisions for installation prior to submittal of bids.

3.2 PREPARATION

A. Surface Preparation: All surfaces to be field painted shall be dry and free of dirt, dust, sand, grit mud, oil, grease, rust, loose mill scale, or other objectionable substances, and shall meet the recommendations of the paint manufacturer for surface preparation. Cleaning and painting operations shall be performed in a manner which will prevent dust or other contaminants from getting on freshly painted surfaces. Oil and grease shall be completely removed by use of solvents or detergents before mechanical cleaning is started. The gloss of previously painted surfaces shall be dulled if necessary for proper adhesion of top coats.

3.3 INSTALLATION

A. Materials furnished under this section shall be installed in proper operating condition in full conformity with the Drawings, Specifications, engineering data, instructions, and recommendations of the equipment manufacturer, unless exceptions are noted by ENGINEER.

Unless otherwise indicated, sleeves shall be provided for all pipe penetrations through concrete and masonry walls. Sleeves and sealing requirements shall be as indicated in Specification section 15000, Piping, General, and as indicated on the Drawings.

Not all required reducing fittings and unions are indicated. Additional fittings and unions shall be provided as needed to connect all equipment and appurtenances at no additional cost to OCSD.

Insulating fittings shall be provided to prevent the contact of dissimilar metals in piping systems.

When located indoors, fuel gas pressure regulator vents and fuel train vent valves shall be piped to the exterior of the building in accordance with the applicable codes and standards.

Piping shall not be routed over or in front of electrical switchboards or panels unless acceptable to ENGINEER.

B. Water Supply Piping and Accessories: Water hammer arresters shall be provided in the hot and cold water supply piping at all quick closing valves, at solenoid valves, and at plumbing fixtures. When not indicated on the Drawings, arresters shall be located and sized by CONTRACTOR in accordance with PDI Standard No. WH201. CONTRACTOR shall submit arrester location and sizing plans to ENGINEER for approval prior to installation. Where possible, water hammer arresters shall be installed in an accessible location.

Water supply piping to hose faucets and hose valves shall be secured with a pipe support within 6 inches of the fixture.

C. Drainage and Vent Piping and Accessories: Unless otherwise indicated or required by code, horizontal sanitary drainage piping 3 inches in diameter or smaller shall be installed at a uniform slope of 1/4 inch per foot; horizontal sanitary drainage piping larger than 3 inches in diameter shall be installed at a uniform slope of 1/8 inch per foot; horizontal storm drainage piping shall be installed at a uniform slope of 1/8 inch per foot.

All cast iron drainage piping, which is buried beneath floors, shall be encased in at least 6 inches of concrete. A joint shall be provided in the piping within 12 inches of each end of the encasement. For buildings or areas supported by piers or piles, the concrete encasement shall be reinforced and connected to the floor slab.

Drainage fittings shall be installed to convey flow in the piping in the intended direction. To the extent possible, changes in direction shall be made by sweep type fittings. Quarter-bends and sanitary tee fittings shall not be installed for vertical to horizontal or horizontal to horizontal changes of direction.

Plumbing vents through roofs shall be located at least 12 inches from a parapet or from the intersection of a cant with the roof deck, and shall be installed with watertight flashings. Plumbing vents shall be located no closer to operable windows or air intakes than is allowed by the applicable code.

Vents connecting to horizontal sanitary piping shall connect above the centerline of the piping and shall rise at an angle of not less than 45 degrees from the horizontal to a point at least 6 inches above the flood level rim of the fixture served before offsetting horizontally.

Floor drains shall be adjusted to the correct elevation for proper drainage. Heads of fastening screws shall be flush with the grate surface.

Cleanouts on drainage piping inside structures shall be located where indicated on the Drawings. Additional cleanouts shall be provided where required by the applicable code or authority having jurisdiction. Cleanouts located in drainage risers shall be located

12 inches above the finished floor.

Unless otherwise indicated or required by the applicable code, cleanout size shall equal the line size for 4 inches and smaller drainage piping, and 4 inches in diameter for drains larger than 4 inches. Proper clearance shall be provided for access to cleanouts. Floor cleanouts shall be installed flush with the finished floor.

Floor drains, trench drains, floor sinks, funnel receptors, and bell-up drains indicated to be equipped with traps shall be provided with deep seal "P" traps located as close to the drain as possible.

D. Plumbing Fixtures and Accessories: Plumbing fixtures shall be set level and plumb, and shall be securely attached to the floor or wall. Unless otherwise indicated on the Drawings, each fixture shall be mounted at the height recommended by the manufacturer. Where required to be in compliance with ADA, fixtures shall be mounted at the heights established by the Federal Government.

Fixtures shall be sealed to the floor or wall with a sealant as specified in Specification section 07900, Joint Sealants. The color of sealant shall match the color of the fixture.

Fixture traps shall be easily removable for servicing and cleaning. Escutcheons shall be placed at all locations where fixture supply or drain piping penetrates walls, floors, or ceilings.

Water piping at stop valves, shower heads, and flush valves shall be rigidly secured to blocking. Drop-ear elbows shall be used whenever possible. All water supply piping shall be cleaned and flushed before the plumbing fixtures are installed.

Shutoff valves located in the potable water (POTW) supply piping to safety fixtures and shutoff valves in the potable water branch piping to the POTW system shall be provided with tags bearing the legend ”WARNING: DO NOT CLOSE VALVE WITHOUT AUTHORIZATION". The tags shall have an orange background and black lettering not less than 1/2 inch in height. Other features of the tags shall be as indicated in the Mechanical Identification paragraph.

E. Plumbing Equipment: Plumbing equipment shall be installed in accordance with the manufacturer's recommendations. Adequate clearance shall be provided for access to all components which may require adjustment, servicing, or replacement.

Water heaters shall be installed in accordance with AGA, NSF, NFPA, and UL requirements. Storage type water heaters shall be cleaned and flushed before being connected to the potable water system. Water heater relief valves shall be piped to the nearest drain or as indicated on the Drawings, and shall terminate the appropriate air gap distance above the drain. Unless otherwise indicated, water heater thermostats shall be set such that the maximum water temperature does not exceed 140 degrees F.

3.4 FIELD QUALITY CONTROL

A. Startup and Testing: Field performance tests shall be conducted to demonstrate that each system is functioning as specified and to the satisfaction of ENGINEER.

If inspection or tests indicate defects, the defective work or material shall be replaced, and inspection and tests repeated. All repairs to piping shall be made with new materials. Caulking of threaded joints or holes will not be acceptable.

B. Adjusting: All devices shall be adjusted for proper flow and quiet operation. Faucet and supply assemblies shall be adjusted or repaired to eliminate leaks. All drains shall be checked for proper operation.

C. Protection: Plumbing fixtures, equipment and appurtenances shall be protected from damage immediately after installation. Plumbing fixtures shall not be used during the construction.

D. Cleaning: After completion of testing and immediately before the final inspection, plumbing fixtures, equipment, piping, and appurtenances shall be thoroughly cleaned. Cleaning materials and methods shall be as recommended by the manufacturer. All faucet aerators shall be removed, cleaned, and reinserted.

Any stoppage, discoloration, or other damage to parts of the building, its finish, or furnishings shall be repaired at no additional cost to OCSD.

E. Disinfection: Before the potable water system is placed in operation, it shall be disinfected in accordance with the requirements of the local authority having jurisdiction. In the absence of local requirements, the following disinfection method shall be used:

1. The system shall be purged with clean potable water until all dirt and other substances are flushed from the system.

2. The system shall be filled with a water/chlorine solution containing at least 50 parts per million of available chlorine and allowed to stand for 24 hours, or the system shall be filled with a water/chlorine solution containing at least 200 parts per million of available chlorine and allowed to stand for 3 hours.

3. The system shall be purged with clean potable water until the chlorine is flushed from the system.

4. The procedure shall be repeated if a bacterial examination indicates that contamination remains present in the system.

F. Operator Instruction and Training: After completion of the field testing, operator instruction and training on equipment and system operation shall be provided for automatic water softener units (4 hours). The training should provide a complete overview of all equipment, testing, adjusting, operation, and maintenance procedures. The training shall take the form of classroom instruction and shall cover:

1. Documentation in the final Operation and Maintenance Manuals.

2. Use the Operation and Maintenance Manuals.

3. Equipment and system startup and shutdown.

4. System operation procedures for all models of operation.

5. Procedures for dealing with abnormal conditions and emergency situations for which there is a specified system response.

The training shall take the form of classroom sessions at the project site conducted by the equipment manufacturer representatives who are knowledgeable and familiar with the project. Hands-on instruction and training will be conducted so that actual operation and maintenance of the equipment and systems can be performed by OCSD upon completion of the training. The length of the operator instruction and training shall as described above.

At least two weeks prior to the proposed date for the operator instruction and training session, CONTRACTOR shall notify ENGINEER and shall submit an outline for the proposed operator instruction and training session. The proposed outline shall be approved before any training is conducted.