NVARNG Water Heater Replacement Specs Bid Set 10-12-26.pdf
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- OTAG Water Heater Replacement
- Solicitation number
- 43ADG-S4055
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- Nevada
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This is a bid set of technical specifications and project manual for the Nevada Army National Guard (NVARNG) Water Heater Replacement project located at 2460 Fairview Drive, Carson City, Nevada. The project involves comprehensive plumbing system work including water heater replacement, domestic water piping, piping insulation, valves, hangers and supports, and related equipment and accessories. The specifications encompass multiple divisions of work including general plumbing conditions, motor requirements, meters and gages, ball valves, check valves, pipe hangers and supports, piping identification, and piping insulation. The document contains detailed technical requirements referencing industry standards such as ASME, ANSI, NSF, MSS, and AWWA. All requests for information and questions must be submitted electronically via the Q&A tab no later than November 12, 2026, at 5:00 PM, with official responses and bid addenda to be posted on or about November 17, 2026. This is classified as a Nevada Revised Statutes (NRS) 338 bid solicitation request and public works project.
The specifications require all materials to be new and UL-labeled where available, with equipment meeting or exceeding published requirements of organizations including ASME, ASPE, ANSI, and IEEE. Contractors must visit the site and survey existing conditions prior to bidding, with no allowance for claims due to existing conditions discovered during work. All work must be performed by skilled mechanics under qualified supervision in accordance with local adopted building codes and applicable regulations. The contractor must provide comprehensive submittals including digital documentation for all equipment, accessories, test and balance procedures, and startup requirements, with submittals expected a minimum of fourteen working days prior to review deadlines. A one-year warranty covering both labor and materials is required, and the contractor must furnish manufacturer guarantees and warranties for all equipment. Change orders for additional work outside the contract scope must be authorized in writing by the Owner's Representative, with labor charges based on actual paid costs not exceeding local prevailing wage rates.
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10597 Double R Blvd, Suite 1
Reno, Nevada 89521
(775) 853-1131 – Fax (775) 852-2352
Water Heater Replacement
Nevada Army National Guard
2460 Fairview Drive
Carson City, NV 89701
Bid Documents Submittal
Project Manual
October 13, 2026
TABLE OF CONTENTS
Project Name: Nevada Army National Guard Office of the Adjutant General
Project Address, City, State: 2460 Fairview Drive Carson City, NV 89701
Technical Specifications
Section 220500 Plumbing General Conditions
Section 220513 Common Motor Requirements for Plumbing Equipment
Section 220519 Meters and Gages for Plumbing Piping
Section 220523.12 Ball Valves for HVAC Piping
Section 220523.14 Check Valves for Plumbing Piping
Section 220529 Hangers and Supports for Plumbing Piping and Equipment
Section 220553 Identification for Plumbing Piping and Equipment
Section 220719 Plumbing Piping Insulation
Section 221116 Domestic Water Piping
Section 221119 Domestic Water Piping Specialties
Section 221123 Domestic Water Pumps
Section 223100 Domestic Water Softeners
Section 223400 Fuel-Fired, Domestic-Water Heaters
Section 231123 Facility Natural-Gas Piping
Section 230800 System Commissioning
Section 230923 Direct Digital Control (DDC) System for HVAC
Section 230993 Sequence of Operations for HVAC
NEVADA ARMY NATIONAL GUARD
OFFICE OF THE ADJUTANT GENERAL
WATER HEATER REPLACEMENT
PLUMBING GENERAL CONDITIONS 220500 - 1
SECTION 220500 – PLUMBING GENERAL CONDITIONS
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. The Drawings and General provisions of the Contract including the "General Conditions", "Supplementary Conditions", and "General Requirements" of the Contract as written and referred to here are adopted and made part of Division 22.
B. The Contract Agreement, Bidding documents, and all Addenda issued prior to Contract
Agreement execution form a part of these specifications and apply to all Contracts or
Subcontracts relating to the plumbing systems.
1.2 SUMMARY
A. The work under this Division shall consist of all labor, materials, equipment, services and related accessories, etc., necessary and required to complete all work as shown or inferred on the Drawings and in the Specifications (Contract Documents).
B. Provide fixed Plumbing, except where specifically noted otherwise.
C. Provide portable Plumbing equipment for the complete system(s).
D. Provide equipment, ducting, piping etc. normally furnished or required for complete Plumbing systems but not specifically specified on the drawings and/or in specifications, as though specified by both.
E. All equipment, ducting, piping etc. shall be new, except where specifically shown or specified otherwise.
1.3 WORK INCLUDED IN THIS DIVISION
A. Plumbing work includes, but is not limited to:
1. Alterations and additions to existing Plumbing systems.
2. Connection of all appliances and equipment including Owner furnished equipment.
B. Install work under this Division per drawings, specifications, latest adopted edition of the Local adopted Building Codes, and any special codes having jurisdiction over specific portions of work within complete installation. In event of conflict, install work per most stringent code requirements determined by Engineer. This does not relieve the Contractor from furnishing and installing work shown or specified which may exceed the requirements of such ordinances, laws, regulations and codes.
C. All materials, products, devices, fixtures, forms or types of construction included in this project shall meet or exceed the published requirements of American Society of Mechanical Engineers
PLUMBING GENERAL CONDITIONS 220500 - 2
(ASME), American Society of Plumbing Engineers (ASPE), American National Standards
Institute (ANSI), and Institute of Mechanical and Electronics Engineers (IEEE). All equipment shall bear the Underwriter’s Laboratories (UL) label or equivalent from approved independent testing laboratory.
D. Arrange, pay fees for and complete work to pass required tests by agencies having authority over work. Deliver to Engineer copies of the Certificates of Inspection and approval issued by authorities and provide original copy of each certificate to Owner.
E. When required by law or regulations, the governmental agency having jurisdiction for inspections shall be given reasonable notice and opportunity to inspect the work. Any work that is enclosed or covered up before such inspection and test shall be uncovered at the Contractor’s expense; after it has been inspected, the Contractor shall restore the work to its original condition at his own expense.
1.4 INSURANCE
A. The Contractor shall procure and maintain, at his expense, such insurance as required by law and/or specified in the General Conditions.
1.5 DRAWINGS AND SPECIFICATIONS
A. Drawings and specifications are complementary. Work called for by one is binding as if called for by both. Any discrepancies between drawings and specifications shall be brought to the attention of the Engineer for clarification during the bidding period. No allowance shall subsequently be made to the Contractor by reason of his failure to have brought said discrepancies to the attention of the Consultant during the bidding period or by reason of any error on the Contractor’s part.
B. Drawings are schematic and diagrammatic in nature. Drawings show general run of distribution and approximate location of equipment. The contractor shall review drawings of all trades to assure coordination prior to placement of work. Right is reserved to change location of equipment and devices, and routing of pipes and ducts within 10 feet, without extra cost to
Owner.
C. Use dimensions in figures, shop drawings, etc. and actual site measurements in preference to scaled dimensions. Do not scale drawings for exact sizes or locations – use dimensioned details or actual field conditions. Verify item mounting heights as required by project conditions prior to rough-in.
D. Discrepancies between different drawings or between drawings and specifications, or regulations and codes governing the installation shall be brought to the attention of the Engineer in writing for determination.
E. Layout equipment as shown on drawings as close as possible. Verify access requirements for equipment actually furnished.
F. Contractor is responsible to field measure and confirm the mounting heights and location of
Plumbing equipment with respect to counters, doorways, and other architectural, electrical, fire
PLUMBING GENERAL CONDITIONS 220500 - 3
or structural work. Do not scale distances off the Plumbing drawings: Use actual building dimensions.
G. Execution of Contract is evidence that Contractor has examined all existing conditions, drawings and specifications related to work, and is informed to extent and character of work.
Later claims for labor and materials required due to difficulties encountered, which could have been foreseen had examination been made, will not be recognized.
H. All work called for in this Section of the plans and specifications shall be performed under this
Section, regardless of whether such work may also have been called for in other Section(s).
Discrepancies in or conflicts among the various parts of the contract drawings shall not relieve
Contractor of his obligation to perform.
I. No attempt has been made to establish the required sections or splits of equipment relative to the size of access into the space, building, etc. Contractor shall establish all said splits, sections, etc. necessary to install equipment complete without undue disassembly of equipment or demolition of building parts at site of work.
J. Charges for extra work are not allowed unless work is authorized by written order from the
Owner’s Representative approving charges for work.
K. These plans, specifications and all related addenda and documents constitute copyright materials of Etchemendy Engineering Inc. These materials shall remain the sole property of
Etchemendy Engineering Inc. And may not be reproduced, distributed to other or used for any purpose whatsoever without the prior written consent of Etchemendy Engineering Inc.
PART 2 - PRODUCTS
2.1 MATERIALS
A. All material shall be new and have a UL label where available. If UL label is not available, material shall be manufactured in accordance with applicable ASME, ANSI, IEEE and Federal
Standards. Use UL labeled components in assemblies that do not have overall UL label.
B. Utilize one of the manufacturers listed to furnish all of the major equipment required for this project.
2.2 SUBSTITUTIONS
A. All equipment and materials scheduled on the drawings or listed in the specifications are the
“basis of design;” equipment and materials used on the project are subject to compliance with all listed requirements. In submitting a bid to complete services in this project, the contractor represents that its bid is based on materials and equipment described in the contract documents, including addenda. Contractors are encouraged to request a review of substitute materials and equipment. Substitutes will be considered only if they keep with the general intent of the contract documents, including quality of work and product, and are fully documented. All requests for review of alternates shall be submitted to the engineer 7 working days prior to the date of bid opening. Substitutes not properly submitted may be rejected without cause. In
PLUMBING GENERAL CONDITIONS 220500 - 4
requesting a review of substitutes the contractor is to provide and item-by-item comparison of the alternate product to the basis of design. Comparisons shall include but are not limited to size, weight, capacity, construction, warranty, finish, etc. Contractors will not be granted extended contract time or fees in connection with the rejection of a substitute product.
Contractor shall fabricate, furnish, install and pay for any additional materials and/or services by any other trade required to facilitate the use of a substituted item.
2.3 SUBMITTALS
A. Before ordering any equipment, contractor is to provide a complete digital submittal for all equipment, accessories, test and balance, startup, fixtures, etc. that bare importance on proper project completion. All certifications for welders, balance contractors and startup technicians are to be provided in their appropriate sections. Submittals expected for final review are to be submitted a minimum of 14 working days prior to the required review and return time. The contractor is included 2 reviews of said submittals; any time incurred by additional submittal reviews caused by rejected or unacceptable submittals will be charged to the contractor at the engineer's hourly billing rate. Submittals will not be accepted that have not been reviewed and approved by the general contractor and/or construction manager having authority on the project.
Incomplete submittals will not be accepted; a single fully encompassing submittal is to be provided by each trade. Contractors will not be granted extended contract time or fees in connection with the rejection of submittals or delays caused by unhurried submittal delivery.
B. Standard factory brochures will not suffice as product submittals; factory submittal packages indicating the products, performance, dimensions, clearances, colors, testing and listing certifications and all accessories to be used are to be provided. In the case of alternates comparison documentation is to be provided showing proof of equality.
C. In the case that additional design services are required by a registered professional the contractor is to provide sealed and signed documentation of work to be completed depicting necessary designs, and performance in accordance with all adopted codes.
PART 3 - EXECUTION
3.1 VISIT TO SITE
A. Visit site, and survey existing conditions affecting work prior to bid. Include necessary materials and labor to accomplish the Plumbing work, including relocation of existing services and utilities on building site in bid. No consideration shall be given to future claims due to existing conditions. Any discrepancies or interferences shall be reported immediately to the
Engineer.
3.2 WORKMANSHIP
A. All work performed shall be first class work in every aspect. The work shall be performed by mechanics skilled in their respective trades, who shall at all times be under the supervision of competent persons.
PLUMBING GENERAL CONDITIONS 220500 - 5
B. Work under this Division shall be first class with emphasis on neatness and workmanship. All work shall be installed square and plumb and concealed where possible. Work that is deficient, defective, poorly laid out, not perfectly aligned, or that is not consistent with the requirements generally accepted in the trade for “first class work” will not be acceptable.
C. In addition to the materials specified elsewhere, furnish and install all other miscellaneous items necessary for the completion of the work to the extent that all systems are complete and operative.
D. All work under this Section shall be performed in cooperation with the work performed under all other Sections of the Specifications for the Project in order to avoid interference with other work and to secure the proper installation of all work. Refer the Drawings and Specifications covering the work to be performed under all Sections, so that the relation and extent of the work of this Section with respect to the work of all other Sections is understood. Give right of way to raceways and piping systems installed at a required slope.
E. Install work using competent mechanics, under supervision of foreman, all duly certified by local authorities. The installation shall be subject to the Engineer’s observation, and final acceptance. The Engineer may reject unsuitable work.
3.3 CHANGE ORDERS
A. Additional work may be required on the project, which is outside the scope of the contract.
Such additional work will be described in Supplemental Instructions and/or Clarifications, to be estimated and priced by the Contractor, and accepted by the Owner, prior to commencing work.
B. Acceptable charges will be limited to the following:
1. Labor hours shall be calculated, and shall be priced based on actual paid cost, not to exceed local Prevailing Wage Rates.
2. Supervision and Support shall not exceed 15% of labor charges. This blanket percentage shall cover foreman, tools, vehicles, record drawings, etc.
3. Charges for material shall be charged at actual unit prices quoted by suppliers, supported by a true copy of the written price quotation.
4. Major equipment items shall be charged at actual unit prices quoted by suppliers, supported by a true copy of the written price quotation.
5. Handling charges for material shall not exceed 5% of material and equipment charges.
This blanket percentage shall cover freight, cartage, wastage, etc.
6. Should the Owner or Engineer find reason to dispute or challenge the Contractor’s pricing of additional work, one of the following solutions may be imposed
7. Contractor shall be directed to proceed with the work and submit his proposed charges for arbitration at the conclusion of the project.
8. Contractor shall maintain a separate labor log and obtain daily signatures thereon, and shall be prepared to submit a certified, audited payroll report to support his claims.
9. Owner shall purchase the disputed equipment and/or material and provide same to
Contractor at job site for installation, along with a copy of the invoice. Contractor may add a 10% charge to cover handling and warranty administration.
PLUMBING GENERAL CONDITIONS 220500 - 6
10. Owner shall contract with a separate licensed Plumbing Contractor to perform the extra work. In this event, the originally contracted work shall be completed by Contractor and accepted by the Owner, following inspection and recommendation by the Engineer. This
Contractor shall cause no impediment to the work of the separate contractor and shall maintain full warranty on his originally installed equipment and workmanship.
3.4 GUARANTEE
A. Furnish the Owner a written guarantee, stating that if the workmanship and/or material executed under this Division are proven defective within one (1) year after final acceptance by the
Owner, such defects and other work damaged will be repaired and/or replaced. Submit with
Operations and Maintenance Manuals.
B. Obtain from the various manufacturers or vendors guarantees or warranties for their particular equipment or components and deliver them to the Owner. All guarantees and warranties provided shall be referenced to this project.
C. In event that systems are placed in operation in several phases at the Owner’s request, guarantee will begin on date each system or item of equipment is accepted for service by the Owner.
Provide O&M manuals for all equipment when equipment is accepted for service by the Owner.
D. All guarantees and warranties shall include labor and material at the site of installation for the duration of the guarantee period.
3.5 COOPERATION
A. Carefully coordinate work with other contractors and subcontractors. Refer conflicts between trades to Engineer. Provide necessary information to other trades for such coordination. Such information shall include Shop Drawings, Product Data and all other required data.
B. Whenever such information is not provided in a timely manner or whenever such information is incorrect, this contractor shall bear all costs for providing or correcting affected work of related trades with no change to the Contract Price or Construction Schedule.
C. Work to be installed as progress of project will allow. Schedule of work determined by General
Contractor, Owner, and/or Architect/Engineer.
3.6 CONTROL WIRING
A. Control Wiring including low voltage and line voltage interlock wiring will be furnished by the
Control’s Contractor. This wiring shall be furnished and installed under the provisions and in compliance with Division 26.
PLUMBING GENERAL CONDITIONS 220500 - 7
3.7 PROTECTING
A. Provide warning lights, bracing, shoring, rails, guards, and covers necessary to prevent damage or injury. All persons working around Plumbing equipment shall have shock and flash protection per OSHA 1910.301-309 & 331-335.
B. Do not leave exposed or unprotected, plumbing items carrying current. Protect visitors and workers from exposure to contact with energized surfaces, parts, etc. in accordance with OSHA standards.
3.8 DELIVERY, STORAGE AND HANDLING
A. Deliver equipment and materials to job site in original, unopened, labeled container. Products shall be properly identified with names, model numbers, types, grades, compliance labels and other information needed for identification. Store to prevent damage and injury. Store materials to prevent corroding. Store finished materials and equipment to prevent staining and discoloring. Store materials affected by condensation in warm dry areas. Provide heaters.
Contractor shall verify the availability of on-site storage space, if no on site storage space is available then the contractor shall cover the cost for off-site storage. Materials stored at the project site that becomes soiled with construction dirt, concrete, or moisture shall be removed from the site and replaced with new. Do not install soiled material.
B. Protect work and materials from damage by weather, entrance of water or dirt. Cap and mark piping and ductwork during installation.
C. Avoid damage to materials and equipment in place. Repair, or remove and replace damaged work and materials.
D. Protection and safekeeping of products stored on premises is responsibility of Contractor supplying products.
E. Schedule of deliveries and unloading to prevent traffic congestion blocking of access or interference with work. Arrange deliveries to avoid larger accumulations of materials than can be suitably stored at site.
F. Install equipment per manufacturer's recommendations. Conflicts between contract documents and these recommendations shall be referred to Engineer for remedy.
G. Plumbing or electronic equipment that has been damaged, exposed to weather or is, in the opinion of the Engineer or Architect, otherwise unsuitable because of improper fabrication, storage or installation shall be removed and replaced by this Contractor at his expense.
3.9 CLEANING AND PAINTING
A. Clean equipment furnished in this Division after completion of work. Clean wipe the interior of all ducting, pipes, equipment soiled with dirt and debris prior to installation of wiring.
B. Touch-up or re-paint damaged painted finishes as determined by the Engineer.
PLUMBING GENERAL CONDITIONS 220500 - 8
C. Contractor is to paint out all diffuser, grille, and internal ductwork portions visible behind terminations in space. All ductwork installed exposed within the space is to be painted per the architectural requirements. Coordinate exact requirements with architectural drawings.
D. Remove debris, packing cartons, scrap, etc., from site daily.
3.10 STARTUP
A. All high efficiency plumbing equipment is to be started up by a factory trained and certified technician.
3.11 TRAINING
A. Training for operation and maintenance of new systems or modifications to existing systems is specified in Technical sections. Contractor shall submit with record documents an itemized receipt signed by Owner’s representative that all specified training has been received.
3.12 ACCESS PANELS
A. The contractor shall furnish all access panels for walls, partitions, etc., and shall give access panel to the General Contractor for installation at locations as directed by the Plumbing
Contractor. It shall be the responsibility of the Plumbing Contractor that access panels are provided for access to all equipment and accessories, which may be concealed by building construction to provide adequate service space and comply with the manufacturers listed requirements. Access panels shall be installed so as not to interfere with building and other system arrangements.
END OF SECTION 230500
WATER HEATER REPLACEMENT
COMMON MOTOR REQUIREMENTS FOR PLUMBING EQUIPMENT 220513 - 1
SECTION 220513 - COMMON MOTOR REQUIREMENTS FOR PLUMBING EQUIPMENT
PART 1 - GENERAL
1.1 SUMMARY
A. Section includes general requirements for single-phase and polyphase, general-purpose, horizontal, small and medium, squirrel-cage induction motors for use on alternating-current power systems up to 600 V and installed at equipment manufacturer's factory or shipped separately by equipment manufacturer for field installation.
1.2 COORDINATION
A. Coordinate features of motors, installed units, and accessory devices to be compatible with the following:
1. Motor controllers.
2. Torque, speed, and horsepower requirements of the load.
3. Ratings and characteristics of supply circuit and required control sequence.
4. Ambient and environmental conditions of installation location.
PART 2 - PRODUCTS
2.1 GENERAL MOTOR REQUIREMENTS
A. Comply with NEMA MG 1 unless otherwise indicated.
2.2 MOTOR CHARACTERISTICS
A. Duty: Continuous duty at ambient temperature of 40 deg C and at altitude of 3300 feet above sea level.
B. Capacity and Torque Characteristics: Sufficient to start, accelerate, and operate connected loads at designated speeds, at installed altitude and environment, with indicated operating sequence, and without exceeding nameplate ratings or considering service factor.
2.3 POLYPHASE MOTORS
A. Description: NEMA MG 1, Design B, medium induction motor.
B. Efficiency: Premium efficient, as defined in NEMA MG 1.
C. Multispeed Motors: Variable torque.
WATER HEATER REPLACEMENT
COMMON MOTOR REQUIREMENTS FOR PLUMBING EQUIPMENT 220513 - 2
1. For motors with 2:1 speed ratio, consequent pole, single winding.
2. For motors with other than 2:1 speed ratio, separate winding for each speed.
D. Bearings: Regreasable, shielded, antifriction ball bearings suitable for radial and thrust loading.
E. Insulation: Class F.
F. Code Letter Designation:
1. Motors Smaller Than 15 HP: Manufacturer's standard starting characteristic.
2.4 ADDITIONAL REQUIREMENTS FOR POLYPHASE MOTORS
A. Motors Used with Reduced-Voltage and Multispeed Controllers: Match wiring connection requirements for controller with required motor leads. Provide terminals in motor terminal box, suited to control method.
B. Motors Used with Variable-Frequency Controllers:
1. Windings: Copper magnet wire with moisture-resistant insulation varnish, designed and tested to resist transient spikes, high frequencies, and short time rise pulses produced by pulse-width-modulated inverters.
2. Inverter-Duty Motors: Class F temperature rise; Class H insulation.
3. Thermal Protection: Comply with NEMA MG 1 requirements for thermally protected motors.
2.5 SINGLE-PHASE MOTORS
A. Motors larger than 1/20 hp shall be one of the following, to suit starting torque and requirements of specific motor application:
1. Permanent-split capacitor.
2. Split phase.
3. Capacitor start, inductor run.
4. Capacitor start, capacitor run.
B. Multispeed Motors: Variable-torque, permanent-split-capacitor type.
C. Bearings: Prelubricated, antifriction ball bearings or sleeve bearings suitable for radial and thrust loading.
D. Motors 1/20 HP and Smaller: Shaded-pole type.
E. Thermal Protection: Internal protection to automatically open power supply circuit to motor when winding temperature exceeds a safe value calibrated to temperature rating of motor insulation. Thermal-protection device shall automatically reset when motor temperature returns to normal range.
WATER HEATER REPLACEMENT
COMMON MOTOR REQUIREMENTS FOR PLUMBING EQUIPMENT 220513 - 3
PART 3 - EXECUTION (Not Applicable)
END OF SECTION 220513
WATER HEATER REPLACEMENT
METERS AND GAGES FOR PLUMBING PIPING 220519 - 1
SECTION 220519 - METERS AND GAGES FOR PLUMBING PIPING
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Bimetallic-actuated thermometers.
2. Liquid-in-glass thermometers.
3. Thermowells.
4. Dial-type pressure gages.
5. Gage attachments.
6. Test plugs.
7. Test-plug kits.
B. Related Requirements:
1. Section 221119 "Domestic Water Piping Specialties" for water meters.
1.3 ACTION SUBMITTALS
A. Product Data: For each type of product.
1.4 INFORMATIONAL SUBMITTALS
A. Product Certificates: For each type of meter and gage.
1.5 CLOSEOUT SUBMITTALS
A. Operation and Maintenance Data: For meters and gages to include in operation and maintenance manuals.
WATER HEATER REPLACEMENT
METERS AND GAGES FOR PLUMBING PIPING 220519 - 2
PART 2 - PRODUCTS
2.1 BIMETALLIC-ACTUATED THERMOMETERS
A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
1. Miljoco Corporation.
2. Watts; a Watts Water Technologies company.
3. Weiss Instruments, Inc
B. Standard: ASME B40.200.
C. Case: sealed type(s); stainless steel with 5-inchinal diameter.
D. Dial: Nonreflective aluminum with permanently etched scale markings and scales in deg F.
E. Connector Type(s): Union joint, adjustable angle, with unified-inch screw threads.
F. Connector Size: 1/2 inch, with ASME B1.1 screw threads.
G. Stem: 0.25 or 0.375 inch in diameter; stainless steel.
H. Window: Plain glass.
I. Ring: Stainless steel.
J. Element: Bimetal coil.
K. Pointer: Dark-colored metal.
L. Accuracy: Plus or minus 1 percent of scale range.
2.2 LIQUID-IN-GLASS THERMOMETERS
A. Metal-Case, Compact-Style, Liquid-in-Glass Thermometers:
B. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
1. Miljoco Corporation.
2. Watts; a Watts Water Technologies company.
3. Weiss Instruments, Inc
4. Standard: ASME B40.200.
5. Case: Cast aluminum; 6-inchnominal size.
6. Case Form: Straight unless otherwise indicated.
7. Tube: Glass with magnifying lens and blue or red organic liquid.
WATER HEATER REPLACEMENT
METERS AND GAGES FOR PLUMBING PIPING 220519 - 3
8. Tube Background: Nonreflective aluminum with permanently etched scale markings graduated in deg F.
9. Window: Glass or plastic.
10. Stem: Aluminum or brass and of length to suit installation.
a. Design for Air-Duct Installation: With ventilated shroud.
b. Design for Thermowell Installation: Bare stem.
11. Connector: 3/4 inch, with ASME B1.1 screw threads.
12. Accuracy: Plus or minus 1 percent of scale range or one scale division, to a maximum of
1.5 percent of scale range.
2.3 THERMOWELLS
A. Thermowells:
1. Standard: ASME B40.200.
2. Description: Pressure-tight, socket-type fitting made for insertion into piping tee fitting.
3. Material for Use with Copper Tubing: CNR or CUNI.
4. Material for Use with Steel Piping: CSA.
5. Type: Stepped shank unless straight or tapered shank is indicated.
6. External Threads: NPS 1/2, NPS 3/4, or NPS 1, ASME B1.20.1 pipe threads.
7. Internal Threads: 1/2, 3/4, and 1 inch, with ASME B1.1 screw threads.
8. Bore: Diameter required to match thermometer bulb or stem.
9. Insertion Length: Length required to match thermometer bulb or stem.
10. Lagging Extension: Include on thermowells for insulated piping and tubing.
11. Bushings: For converting size of thermowell's internal screw thread to size of thermometer connection.
B. Heat-Transfer Medium: Mixture of graphite and glycerin.
2.4 PRESSURE GAGES
A. Direct-Mounted, Metal-Case, Dial-Type Pressure Gages:
1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
a. Miljoco Corporation.
b. Watts; a Watts Water Technologies company.
c. Weiss Instruments, Inc.
2. Standard: ASME B40.100.
3. Case: Sealed type; cast aluminum or drawn steel; min 4-1/2-inch nominal diameter.
4. Pressure-Element Assembly: Bourdon tube unless otherwise indicated.
5. Pressure Connection: Brass, with NPS 1/4 or NPS 1/2, ASME B1.20.1 pipe threads and bottom-outlet type unless back-outlet type is indicated.
6. Movement: Mechanical, with link to pressure element and connection to pointer.
WATER HEATER REPLACEMENT
METERS AND GAGES FOR PLUMBING PIPING 220519 - 4
7. Dial: Nonreflective aluminum with permanently etched scale markings graduated in psi and kPa.
8. Pointer: Dark-colored metal.
9. Window: Glass.
10. Ring: Stainless steel.
11. Accuracy: Grade A, plus or minus 1 percent of middle half of scale range.
2.5 GAGE ATTACHMENTS
A. Snubbers: ASME B40.100, brass; with NPS 1/4 or NPS 1/2, ASME B1.20.1 pipe threads and porous-stainless steel-type surge-dampening device. Include extension for use on insulated piping.
B. Siphons: Loop-shaped section of [steel pipe with NPS 1/4 or NPS ½pipe threads.
C. Valves: Brass or stainless-steel needle, with NPS 1/4 or NPS 1/2, ASME B1.20.1 pipe threads.
2.6 TEST PLUGS
A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
1. Miljoco Corporation.
2. Watts; a Watts Water Technologies company.
3. Weiss Instruments, Inc.
B. Description: Test-station fitting made for insertion into piping tee fitting.
C. Body: Brass or stainless steel with core inserts and gasketed and threaded cap. Include extended stem on units to be installed in insulated piping.
D. Thread Size: NPS ¼or NPS 1/2, ASME B1.20.1 pipe thread.
E. Minimum Pressure and Temperature Rating: 500 psig at 200 deg F.
F. Core Inserts: Chlorosulfonated polyethylene synthetic and EPDM self-sealing rubber.
G. Cap: Gasketed and threaded cap, of same material as plug.
2.7 TEST-PLUG KITS
A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
1. Miljoco Corporation.
2. Watts; a Watts Water Technologies company.
3. Weiss Instruments, Inc.
WATER HEATER REPLACEMENT
METERS AND GAGES FOR PLUMBING PIPING 220519 - 5
B. Furnish one test-plug kit containing one thermometer(s), one pressure gage and adapter, and carrying case. Thermometer sensing elements, pressure gage, and adapter probes shall be of diameter to fit test plugs and of length to project into piping.
C. Thermometer: Small, bimetallic insertion type with 1- to 2-inch-diameter dial and tapered-end sensing element. Dial range shall be at least 0 to 220 deg F.
D. Pressure Gage: Small, Bourdon-tube insertion type with 2- to 3-inch-diameter dial and probe.
Dial range shall be at least 0 to 200 psig.
E. Carrying Case: Metal or plastic, with formed instrument padding.
2.8 TEST-PLUG KITS
A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
1. Miljoco Corporation.
2. Watts; a Watts Water Technologies company.
3. Weiss Instruments, Inc.
B. Furnish one test-plug kit containing one thermometer(s), one pressure gage and adapter, and carrying case. Thermometer sensing elements, pressure gage, and adapter probes shall be of diameter to fit test plugs and of length to project into piping.
C. Thermometer: Small, bimetallic insertion type with 1- to 2-inch-diameter dial and tapered-end sensing element. Dial range shall be at least 0 to 220 deg F.
D. Pressure Gage: Small, Bourdon-tube insertion type with 2- to 3-inch-diameter dial and probe.
Dial range shall be at least 0 to 200 psig.
E. Carrying Case: Metal or plastic, with formed instrument padding.
PART 3 - EXECUTION
3.1 INSTALLATION
A. Install thermowells with socket extending center of pipe diameter and in vertical position in piping tees.
B. Install thermowells of sizes required to match thermometer connectors. Include bushings if required to match sizes.
C. Install thermowells with extension on insulated piping.
D. Fill thermowells with heat-transfer medium.
E. Install direct-mounted thermometers in thermowells and adjust vertical and tilted positions.
WATER HEATER REPLACEMENT
METERS AND GAGES FOR PLUMBING PIPING 220519 - 6
F. Install remote-mounted thermometer bulbs in thermowells and install cases on panels; connect cases with tubing and support tubing to prevent kinks. Use minimum tubing length.
G. Install direct-mounted pressure gages in piping tees with pressure gage located on pipe at the most readable position.
H. Install valve and snubber piping for each pressure gage for fluids.
I. Install test plugs in piping tees.
J. Install thermometers in the following locations:
1. Inlet and outlet of each water heater.
2. Inlets and outlets of each domestic mixing valve.
3. Downstream of each hot water re-circulation pump.
K. Install pressure gages in the following locations:
1. Inlet and outlet of each pressure-reducing valve.
2. Suction and discharge of each domestic hot water re-circulation pump.
3.2 CONNECTIONS
A. Install meters and gages adjacent to machines and equipment to allow service and maintenance of meters, gages, machines, and equipment.
3.3 ADJUSTING
A. Adjust faces of meters and gages to proper angle for best visibility.
3.4 THERMOMETER SCHEDULE
A. Thermometers at inlet and outlet of each domestic water heater shall be the following:
1. Liquid-filled, bimetallic-actuated type.
3.5 THERMOMETER SCALE-RANGE SCHEDULE
A. Scale Range for Domestic Cold-Water Piping: 0 to 100 deg F.
B. Scale Range for Domestic Hot-Water Piping: 30 to 240 deg F.
3.6 PRESSURE-GAGE SCHEDULE
A. Pressure gages at discharge of each water service into building shall be the following:
1. Liquid-filled, direct-mounted, metal case.
WATER HEATER REPLACEMENT
METERS AND GAGES FOR PLUMBING PIPING 220519 - 7
2. Test plug with EPDM self-sealing rubber inserts.
B. Pressure gages at inlet and outlet of each water pressure-reducing valve shall be one of the following:
1. Liquid-filled, direct-mounted, metal case.
2. Test plug with EPDM self-sealing rubber inserts.
3.7 PRESSURE-GAGE SCALE-RANGE SCHEDULE
A. Scale Range for Water Service Piping: 0 to 160 psi.
B. Scale Range for Domestic Water Piping: 0 to 100 psi.
END OF SECTION 220519
BALL VALVES FOR PLUMBING PIPING 220523.12 - 1
SECTION 220523.12 - BALL VALVES FOR PLUMBING PIPING
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Brass ball valves.
2. Bronze ball valves.
1.3 DEFINITIONS
A. CWP: Cold working pressure.
1.4 ACTION SUBMITTALS
A. Product Data: For each type of valve.
1. Certification that products comply with NSF 61and NSF 372.
1.5 DELIVERY, STORAGE, AND HANDLING
A. Prepare valves for shipping as follows:
1. Protect internal parts against rust and corrosion.
2. Protect threads, flange faces, and soldered ends.
3. Set ball valves open to minimize exposure of functional surfaces.
B. Use the following precautions during storage:
1. Maintain valve end protection.
2. Store valves indoors and maintain at higher-than-ambient-dew-point temperature. If outdoor storage is necessary, store valves off the ground in watertight enclosures.
C. Use sling to handle large valves; rig sling to avoid damage to exposed parts. Do not use operating handles or stems as lifting or rigging points.
BALL VALVES FOR PLUMBING PIPING 220523.12 - 2
PART 2 - PRODUCTS
2.1 GENERAL REQUIREMENTS FOR VALVES
A. Source Limitations for Valves: Obtain each type of valve from single source from single manufacturer.
B. ASME Compliance:
1. ASME B1.20.1 for threads for threaded end valves.
2. ASME B16.1 for flanges on iron valves.
3. ASME B16.5 for flanges on steel valves.
4. ASME B16.10 and ASME B16.34 for ferrous valve dimensions and design criteria.
5. ASME B16.18 for solder-joint connections.
6. ASME B31.9 for building services piping valves.
C. NSF Compliance: NSF 61 and NSF 372 for valve materials for potable-water service.
D. Bronze valves shall be made with dezincification-resistant materials. Bronze valves made with copper alloy (brass) containing more than 15 percent zinc are not permitted.
E. Valve Pressure-Temperature Ratings: Not less than indicated and as required for system pressures and temperatures.
F. Valve Sizes: Same as upstream piping unless otherwise indicated.
G. Valve Actuator Types:
1. Gear Actuator: For quarter-turn valves NPS 4 and larger.
2. Handlever: For quarter-turn valves smaller than NPS 4.
H. Valves in Insulated Piping:
1. Include 2-inch stem extensions.
2. Extended operating handles of nonthermal-conductive material and protective sleeves that allow operation of valves without breaking vapor seals or disturbing insulation.
3. Memory stops that are fully adjustable after insulation is applied.
2.2 BRASS BALL VALVES
A. Brass Ball Valves, One-Piece:
1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
a. Apollo Valves; Conbraco Industries, Inc.
b. NIBCO INC.
c. Tyco Valves & Controls.
d. Watts
2. Description:
BALL VALVES FOR PLUMBING PIPING 220523.12 - 3
a. Standard: MSS SP-110.
b. CWP Rating: 400 psig.
c. Body Design: One piece.
d. Body Material: Forged brass.
e. Ends: Threaded.
f. Seats: PTFE.
g. Stem: Brass.
h. Ball: Chrome-plated brass.
i. Port: Full.
2.3 BRONZE BALL VALVES
A. Bronze Ball Valves, One-Piece:
B. One-Piece Bronze Ball Valves:
1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
a. Apollo Valves; Conbraco Industries, Inc.
b. NIBCO INC.
c. Tyco Valves & Controls.
d. Watts:
2. Description:
a. Standard: MSS SP-110.
b. CWP Rating: 400 psig.
c. Body Design: One piece.
d. Body Material: Bronze.
e. Ends: Threaded.
f. Seats: PTFE.
g. Stem: Bronze.
h. Ball: Chrome-plated brass.
i. Port: Full.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine valve interior for cleanliness, freedom from foreign matter, and corrosion. Remove special packing materials, such as blocks, used to prevent disc movement during shipping and handling.
B. Operate valves in positions from fully open to fully closed. Examine guides and seats made accessible by such operations.
C. Examine threads on valve and mating pipe for form and cleanliness.
BALL VALVES FOR PLUMBING PIPING 220523.12 - 4
D. Examine mating flange faces for conditions that might cause leakage. Check bolting for proper size, length, and material. Verify that gasket is of proper size, that its material composition is suitable for service, and that it is free from defects and damage.
E. Do not attempt to repair defective valves; replace with new valves.
3.2 VALVE INSTALLATION
A. Install valves with unions or flanges at each piece of equipment arranged to allow service, maintenance, and equipment removal without system shutdown.
B. Locate valves for easy access and provide separate support where necessary.
C. Install valves in horizontal piping with stem at or above center of pipe.
D. Install valves in position to allow full stem movement.
E. Install valve tags. Comply with requirements in Section 220553 "Identification for Plumbing
Piping and Equipment" for valve tags and schedules.
3.3 GENERAL REQUIREMENTS FOR VALVE APPLICATIONS
A. If valves with specified CWP ratings are unavailable, the same types of valves with higher CWP ratings may be substituted.
B. Select valves with the following end connections:
1. For Copper Tubing, NPS 2 and Smaller: Threaded ends except where solder-joint valve-end option is indicated in valve schedules below.
2. For Copper Tubing, NPS 2-1/2 to NPS 4: Flanged ends except where threaded valve-end option is indicated in valve schedules below.
3. For Steel Piping, NPS 2 and Smaller: Threaded ends.
4. For Steel Piping, NPS 2-1/2 to NPS 4: Flanged ends except where threaded valve-end option is indicated in valve schedules below.
3.4 DOMESTIC HOT- AND COLD-WATER VALVE SCHEDULE
A. Pipe NPS 2 and Smaller:
1. Brass ball valve, one piece. Provide with threaded-joint ends.
2. Bronze ball valve, one piece with bronze trim. Provide with threaded-joint ends.
B. Pipe NPS 2-1/2 and Larger:
1. Brass ball valve, one piece. Provide with flanged ends.
2. Bronze ball valve, one piece with bronze trim. Provide with flanged ends.
WATER HEATER REPLACEMENT
CHECK VALVES FOR PLUMBING PIPING 220523.14 - 1
SECTION 220523.14 - CHECK VALVES FOR PLUMBING PIPING
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Bronze lift check valves.
2. Bronze swing check valves.
1.3 DEFINITIONS
A. CWP: Cold working pressure.
B. EPDM: Ethylene propylene-diene terpolymer rubber.
C. NBR: Acrylonitrile-butadiene, Buna-N, or nitrile rubber.
1.4 ACTION SUBMITTALS
A. Product Data: For each type of valve.
1. Certification that products comply with NSF 61[ and NSF 372].
1.5 DELIVERY, STORAGE, AND HANDLING
A. Prepare valves for shipping as follows:
1. Protect internal parts against rust and corrosion.
2. Protect threads, flange faces, grooves, and weld ends.
3. Set check valves in either closed or open position.
B. Use the following precautions during storage:
1. Maintain valve end protection.
2. Store valves indoors and maintain at higher-than-ambient-dew-point temperature. If outdoor storage is necessary, store valves off the ground in watertight enclosures.
WATER HEATER REPLACEMENT
CHECK VALVES FOR PLUMBING PIPING 220523.14 - 2
C. Use sling to handle large valves; rig sling to avoid damage to exposed parts. Do not use handwheels or stems as lifting or rigging points.
PART 2 - PRODUCTS
2.1 GENERAL REQUIREMENTS FOR VALVES
A. Source Limitations for Valves: Obtain each type of valve from single source from single manufacturer.
B. ASME Compliance:
1. ASME B1.20.1 for threads for threaded end valves.
2. ASME B16.10 and ASME B16.34 for ferrous valve dimensions and design criteria.
3. ASME B16.18 for solder joint.
4. ASME B31.9 for building services piping valves.
C. AWWA Compliance: Comply with AWWA C606 for grooved-end connections.
D. Drinking Water System Components - Health Effects and Drinking Water System Components
- Lead Content Compliance: NSF 61 and NSF 372.
E. Bronze valves shall be made with dezincification-resistant materials. Bronze valves made with copper alloy (brass) containing more than 15 percent zinc are not permitted.
F. Valve Pressure-Temperature Ratings: Not less than indicated and as required for system pressures and temperatures.
G. Valve Sizes: Same as upstream piping unless otherwise indicated.
H. Valve Bypass and Drain Connections: MSS SP-45.
2.2 BRONZE LIFT CHECK VALVES
A. Bronze Lift Check Valves with Bronze Disc, Class 125:
1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
a. Hammond Valve.
b. Mueller Steam Specialty.
c. NIBCO INC.
d. Red-White Valve Corporation.
e. Watts; a Watts Water Technologies
2. Description:
a. Standard: MSS SP-80, Type 1.
b. CWP Rating: 200 psig.
WATER HEATER REPLACEMENT
CHECK VALVES FOR PLUMBING PIPING 220523.14 - 3
c. Body Design: Vertical flow.
d. Body Material: ASTM B61 or ASTM B62, bronze.
e. Ends: Threaded or soldered. See valve schedule articles.
f. Disc: Bronze.
B. Bronze Lift Check Valves with Nonmetallic Disc, Class 125:
1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
a. Hammond Valve.
b. Mueller Steam Specialty.
c. NIBCO INC.
d. Red-White Valve Corporation.
e. Watts; a Watts Water Technologies
2. Description:
a. Standard: MSS SP-80, Type 2.
b. CWP Rating: 200 psig.
c. Body Design: Vertical flow.
d. Body Material: ASTM B61 or ASTM B62, bronze.
e. Ends: Threaded or soldered. See valve schedule articles.
f. Disc: NBR, PTFE.
2.3 BRONZE SWING CHECK VALVES
A. Bronze Swing Check Valves with Bronze Disc, Class 125:
1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
a. Hammond Valve.
b. Mueller Steam Specialty.
c. NIBCO INC.
d. Red-White Valve Corporation.
e. Watts; a Watts Water Technologies
2. Description:
a. Standard: MSS SP-80, Type 3.
b. CWP Rating: 200 psig.
c. Body Design: Horizontal flow.
d. Body Material: ASTM B62, bronze.
e. Ends: Threaded or soldered. See valve schedule articles.
f. Disc: Bronze.
B. Bronze Swing Check Valves with Nonmetallic Disc, Class 125:
1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
WATER HEATER REPLACEMENT
CHECK VALVES FOR PLUMBING PIPING 220523.14 - 4
a. Hammond Valve.
b. Mueller Steam Specialty.
c. NIBCO INC.
d. Red-White Valve Corporation.
e. Watts; a Watts Water Technologies
2. Description:
a. Standard: MSS SP-80, Type 4.
b. CWP Rating: 200 psig.
c. Body Design: Horizontal flow.
d. Body Material: ASTM B62, bronze.
e. Ends: Threaded or soldered. See valve schedule articles.
f. Disc: PTFE.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine valve interior for cleanliness, freedom from foreign matter, and corrosion. Remove special packing materials, such as blocks, used to prevent disc movement during shipping and handling.
B. Operate valves in positions from fully open to fully closed. Examine guides and seats made accessible by such operations.
C. Examine threads on valve and mating pipe for form and cleanliness.
D. Examine mating flange faces for conditions that might cause leakage. Check bolting for proper size, length, and material. Verify that gasket is of proper size, that its material composition is suitable for service, and that it is free from defects and damage.
E. Do not attempt to repair defective valves; replace with new valves.
3.2 VALVE INSTALLATION
A. Install valves with unions or flanges at each piece of equipment arranged to allow service, maintenance, and equipment removal without system shutdown.
B. Locate valves for easy access and provide separate support where necessary.
C. Install valves in horizontal piping with stem at or above center of pipe.
D. Install valves in position to allow full stem movement.
E. Check Valves: Install check valves for proper direction of flow.
1. Swing Check Valves: In horizontal position with hinge pin level.
2. Lift Check Valves: With stem upright and plumb.
WATER HEATER REPLACEMENT
CHECK VALVES FOR PLUMBING PIPING 220523.14 - 5
F. Install valve tags. Comply with requirements in Section 220553 "Identification for Plumbing
Piping and Equipment" for valve tags and schedules.
3.3 ADJUSTING
A. Adjust or replace valve packing after piping systems have been tested and put into service but before final adjusting and balancing. Replace valves if persistent leaking occurs.
3.4 GENERAL REQUIREMENTS FOR VALVE APPLICATIONS
A. If valve applications are not indicated, use the following:
1. Pump-Discharge Check Valves:
a. NPS 2 and Smaller: Bronze swing check valves with bronze disc.
B. If valves with specified CWP ratings are unavailable, the same types of valves with higher CWP ratings may be substituted.
C. End Connections:
1. For Copper Tubing, NPS 2 and Smaller: Threaded or soldered.
2. For Copper Tubing, NPS 2-1/2 to NPS 4: Flanged.
3. For Steel Piping, NPS 2 and Smaller: Threaded.
4. For Steel Piping, NPS 2-1/2 to NPS 4: Flanged.
3.5 DOMESTIC HOT- AND COLD-WATER VALVE SCHEDULE
A. Pipe NPS 2 and Smaller:
1. Bronze swing check valves with bronze disc, Class 125, with threaded end connections.
B. Pipe NPS 2-1/2 and Larger:
1. Bronze swing check valves with bronze disc, Class 125, with flanged connections.
END OF SECTION 220523.14
WATER HEATER REPLACEMENT
HANGERS AND SUPPORTS FOR PLUMBING PIPING AND EQUIPMENT 220529 - 1
SECTION 220529 - HANGERS AND SUPPORTS FOR PLUMBING PIPING AND EQUIPMENT
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Metal pipe hangers and supports.
2. Trapeze pipe hangers.
3. Metal framing systems.
4. Thermal hanger-shield inserts.
5. Fastener systems.
6. Pipe stands.
7. Pipe-positioning systems.
8. Equipment supports.
B. Related Requirements:
1. Section 055000 "Metal Fabrications" for structural-steel shapes and plates for trapeze hangers for pipe and equipment supports.
2. Section 220516 "Expansion Fittings and Loops for Plumbing Piping" for pipe guides and anchors.
1.3 ACTION SUBMITTALS
A. Shop Drawings: Signed and sealed by a qualified professional engineer. Show fabrication and installation details and include calculations for the following:
1. Trapeze pipe hangers.
2. Metal framing systems.
3. Fiberglass strut systems.
4. Pipe stands.
5. Equipment supports.
B. Delegated-Design Submittal: For trapeze hangers indicated to comply with performance requirements and design criteria, including analysis data signed and sealed by the qualified professional engineer responsible for their preparation.
1. Detail fabrication and assembly of trapeze hangers.
2. Include design calculations for designing trapeze hangers.
WATER HEATER REPLACEMENT
HANGERS AND SUPPORTS FOR PLUMBING…
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