邢唷��>� ��欹�[ ��廾bjbj G�lk瞚lk瞚坪��8��h\��.t��(�� K.M.M.M.M.M.M.$@0��2q.� q.��4�.%%% ~��K.% K.%%�'(��`Db�#��J�'7.�.0�.(4��4(4�(( % q.q.�"8 �. ��4 X^: SECTION 22 10 00 plumbing piping GENERAL RELATED DOCUMENTS Drawings and general provisions of the Contract, including General Conditions and Division�01 Specification Sections, apply to this Section. SUMMARY Provide materials and installation for complete first-class plumbing systems, within and to five feet beyond building perimeter unless noted otherwise on Contract Drawings; Sanitary Waste and Vent Piping, Storm Drain Piping, Domestic Water Piping, Domestic Water Valves, Testing and other normal parts that make the systems operable, code compliant and acceptable to the authorities having jurisdiction. REFERENCE STANDARDS The latest published edition of a reference shall be applicable to this Project unless identified by a specific edition date. All reference amendments adopted prior to the effective date of this Contract shall be applicable to this Project. All materials, installation and workmanship shall comply with the applicable requirements and standards addressed within the following references: 2015 Edition of the International Plumbing Code. NOTE: MD Anderson takes various exceptions to the International Plumbing Code and has adopted the more stringent requirements within the Uniform Plumbing Code. These exceptions are included within Project Specifications and/or Project Design Drawings. NSF/ANSI 61: Drinking Water System Components - Health Effects. NSF/ANSI 372: Drinking Water System Components � Lead Content QUALITY ASSURANCE Manufacturer抯 name and pressure rating shall be permanently marked on valve body. The Contractor shall notify the manufacturer's representative prior to installing any copper press fittings. The Contractor shall obtain the representative抯 guidance in any unfamiliar installation procedures. The manufacturer's representative of copper press fittings shall conduct periodic inspections of the installation and shall report in writing to the Contractor and Owner of any observed deviations from manufacturer抯 recommended installation practices. Manufacturer Qualifications: Company shall have minimum three years documented experience specializing in manufacturing the products specified in this section. All grooved joint couplings, fittings, flanges, valves, and specialties of the same type shall be the products of a single manufacturer. Grooving tools shall be of the same manufacturer as grooved components. Installer Qualifications: Company shall have minimum three years documented experience specializing in performing the work of this section. Installation of plumbing systems shall be performed by individuals licensed by the Texas State Board of Plumbing Examiners as a Journeyman or Master Plumber. Installation may be performed by Apprentice Plumbers provided they are registered with the Texas State Board of Plumbing examiners and under direct supervision of a licensed plumber. All installation shall be supervised by a licensed Master Plumber. All installers of copper press fittings shall be trained by the fitting manufacturer's appointed representative. Written notification of training shall be submitted to Owner prior to any installation. All installers of copper grooved fittings shall be trained by the fitting manufacturer's appointed representative. Written notification of training shall be submitted to Owner prior to any installation. SUBMITTALS Product Data: Code and Standards compliance, manufacturer's data for pipe, fittings, valves and all other products included within this specification section. Grooved joint valves, couplings and fittings shall be specifically identified with the applicable style or series designation. Manufacturer抯 installation instructions. Record Documents: Record actual locations of valves, etc. and prepare valve charts. Test reports and inspection certification for all systems listed herein. Provide a certificate of completion detailing the domestic water system chlorination procedure and all laboratory test results. Submit proposed location of access panels which vary from quantities or locations indicated on Contract Drawings. Provide full written description of manufacturer抯 warranty. Operation and Maintenance Data: Include components of system, servicing requirements, Record Drawings, inspection data, installation instructions, exploded assembly views, replacement part numbers and availability, location and contact numbers of service depot. DELIVERY, STORAGE and HANDLING All materials shall be new, undamaged, and free of rust. Accept valves on Site in shipping containers and maintain in place until installation. Provide temporary protective coating and end plugs on valves not packaged within containers. Maintain in place until installation. Provide temporary end caps and closures on pipe and fittings. Maintain in place until installation. Protect installed piping, valves and associated materials during progression of the construction period to avoid clogging with dirt, and debris and to prevent damage, rust, etc. Remove dirt and debris and repair materials as work progresses and isolate parts of completed system from uncompleted parts. Protect all materials that are to be installed within this project from exposure to rain, freezing temperatures and direct sunlight. EXCEPTION: Materials manufactured for exterior locations. EXTRA MATERIALS Refer to Section 01 78 46 for Maintenance Material Requirements. PRODUCTS GENERAL All materials shall meet or exceed all applicable referenced standards, federal, state and local requirements, and conform to codes and ordinances of authorities having jurisdiction. Provide materials as specified herein and indicated on Contract Drawings. All materials and work shall meet or exceed all applicable Federal and State requirements and conform to adopted codes and ordinances of authorities having jurisdiction. Pressure ratings of pipe, fittings, couplings, valves, and all other appurtenances shall be suitable for the anticipated system pressures in which they are installed. SANITARY WASTE AND VENT AND STORM DRAINAGE PIPING Sanitary Waste and Vent and Unburied Storm Drainage Piping: Cast iron soil pipe and fittings with hubless connections using clamp type gasketed mechanical fasteners above ground and hub and spigot DWV pipe and fittings with neoprene compression gasket joints for all buried pipe. The cast iron soil pipe and fittings shall be manufactured to ASTM A888, ASTM A74 and CISPI 301 (including Annex A). The cast iron soil pipe shall be listed with an ANSI Accredited Testing Agency for quality assurance and also include CISPI Trademark or NSF Trademark stamped or imprinted on the pipe. Cast iron soil pipe, fittings and hub gaskets shall be manufactured by Tyler Pipe (Durapipe), AB & I or Charlotte Pipe. All cast iron pipe and fittings shall be of the same manufacturer. [NOTE TO SPEC WRITER: Unburied sanitary waste and vent pipe and fittings installed at the Houston Campus (North of Holcombe Boulevard), shall be epoxy coated hubless cast iron soil pipe and fittings manufactured by Tyler Pipe (Durapipe) or Charlotte Pipe (Edge HP).] [NOTE TO SPEC WRITER: (Design as approved by owner for specific projects) Buried sanitary and vent pipe and fittings � Type 1 Schedule 40 PVC pipe (solid core) conforming to ASTM D-1784, ASTM D-2321 with DWV pattern fittings with solvent cement joints.] Buried Storm Drainage Piping: Type � 1 Schedule 40 PVC pipe (solid core) conforming to ASTM D-1784, ASTM D-2321 with DWV pattern fittings with solvent cement joints. Secondary (emergency overflow) roof drain piping that discharges onto face of exterior building wall shall be CPVC Type IV, manufactured in accordance with ASTM F 2618, with CPVC drainage pattern fittings meeting ASTM D 3311. Joining method for CPVC pipe and fittings shall be with CPVC solvent cement manufactured in accordance with ASTM F 493. CPVC pipe and fittings shall meet 25/50 flame/smoke requirement for use in return air plenums when tested to ASTM E 84. All pipe, fittings and cement shall be supplied together and warranted as a system, manufactured by Spears Manufacturing Company or Owner approved equal. EXCEPTION: Secondary roof drain piping that discharges at grade level shall be as specified within paragraphs 2.02 A and/or C. Indirect waste piping sizes 1-1/4� through 2� serving fixtures and equipment shall be seamless copper DWV tube with wrought copper or wrought copper alloy solder joint drainage pattern DWV fittings. Indirect waste piping sizes 1� and smaller serving equipment shall be type "L" hard drawn copper pipe and wrought copper or cast copper alloy solder joint fittings using lead-free solder and non-corrosive flux. Elbows shall be long radius type. Tee fittings shall be combination wye with 45-degree elbow. Cast iron soil pipe compression gaskets shall be monolithically molded from an elastomer meeting ASTM C 564 and shall be of same manufacturer as pipe and fittings. Clamps for joining hubless cast iron pipe and fittings sizes 1-1/2� through 15� shall meet the performance criteria of FM 1680, have type 304 stainless steel jacket, ASTM C 564 neoprene gasket and type 305 stainless steel band screws designed to be installed with a pre-set torque wrench. Couplings shall be manufactured by Clamp-All, Inc. HI-TORQ 125, Ideal Tridon HD or Husky, Inc., Orangeshield SD 4000. Hubless piping systems shall not be used in a directly buried, underground application. EXCEPTION: No-hub type fittings with clamp type coupling joints may be used below ground for pipe sizes up to 10� at connections to existing cast iron sewers provided couplings are cast iron with stainless steel bolts as manufactured by MG Piping Products. Solder for copper piping shall be lead-free Tin/Copper/Silver/Nickle(optional) solder conforming to ASTM B32, Lucas Milhaupt Silvabrite 100 Lead-Free Solder or Harris Nick Lead-Free Solder. Use water soluble flux recommended by solder manufacturer and conforming to ASTM B813 and NSF 61, Lucas Milhaupt Silvabrite 100 Water Soluble Flux or Bridgit Water Soluble Paste Flux. Lubricant for drainage cleanout plugs shall be Loctite Marine Grade Anti-Seize or approved equal by Bostik Chemical Group, or Dow Corning Corporation. Double sanitary tee fittings shall be not be used as a drainage fitting. Provide IAPMO figure one, IAPMO figure five or double wye and eighth bend fittings on vertical lines serving back-to-back fixture drains. Double wye and eighth bend fittings shall not be installed in horizontal drain lines. All P-traps for floor drains, floor sinks and hub drains shall be deep-seal type. Provide DWV copper trap adaptors or threaded brass marvel rings to connect fixture waste outlet to service piping within walls. Galvanized nipples shall not be acceptable. DOMESTIC WATER PIPING (Includes Cold, Hot, Softened Water & animal watering) All materials within domestic water distribution systems that may come in contact with the potable water delivered shall be UL classified in accordance with ANSI / NSF-61 for hot and cold potable water service, and shall be certified to the low lead requirements of NSF-372. Manufacturer must provide written documentation of compliance. All brass and bronze piping materials within domestic water distribution systems that may come in contact with the potable water delivered shall have no more than 15% zinc content. Unburied piping shall be type "L" hard drawn copper pipe and wrought copper or cast copper alloy solder joint fittings using lead-free solder and non-corrosive flux. Piping sizes 2-1/2� and larger may be type 揕� hard drawn copper and wrought copper or cast copper alloy roll groove fittings Style 607 Quick Vic utilizing no-sweat coupling with NSF 61 and NSF 372 approved gasket for hot and cold water, and flange adaptor Style 641 assemblies as manufactured by Victaulic or Owner approved equal by Anvil (Gruvlok). Flaring of tube and fitting ends to IPS dimensions is not allowed. Provide a phenolic flange washer with flange when the mating flange face is not a smooth, hard surface. Refer to manufacturer抯 installation instructions for additional details. Unburied piping sizes 綌 through 4" installed within occupied buildings for modifying existing systems may utilize copper press fittings when the following conditions are met: Written approval of the Owner's Property Manager shall be obtained prior to bidding. Fittings shall be installed in portions of systems having an operating pressure that will not exceed 200 p.s.i.g. Fittings shall conform to the material and sizing requirements of ASME B16.18 or ASME B16.22. O-rings for copper press fittings shall be EPDM. Copper press fittings shall be rated at 200 psi working pressure and 250 degree working temperature. Copper press fittings shall not be used at water supply stub-outs having threaded connections; such as fixture supply stops, flush valves, etc. Solder fittings shall be used at these and similar locations having screwed connections. All copper press fittings, couplings and specialties shall be manufactured by Viega Propress or Apollo Press. Installation tools shall be as recommended by the fittings manufacturer. Solder for copper piping shall be lead-free Tin/Copper/Silver/Nickle(optional) solder conforming to ASTM B32, Lucas Milhaupt Silvabrite 100 Lead-Free Solder or Harris Nick Lead-Free Solder. Use water soluble flux recommended by solder manufacturer and conforming to ASTM B813 and NSF 61, Lucas Milhaupt Silvabrite 100 Water Soluble Flux or Bridgit Water Soluble Paste Flux. Buried domestic water service entrance piping 4� and larger shall be cement mortar lined Class 53 ductile iron pipe and 350 psi working pressure ductile iron fittings using mechanical joints. All buried ductile iron pipe and fittings shall be encased in polyethylene per ANSI/AWWA Standard C105/A21.5, Method A. Minimum thickness of polyethylene shall be 8 mil. Buried pressurized piping sizes 1� and smaller shall be type 揔� soft copper. No joints shall be allowed below slab. Encase piping within 綌 thick un-slit flexible tube type elastomeric thermal insulation up to 1� above slab at both ends. Insulation shall be AP/Armaflex or Rubatex Insul-Tube 180. Unburied trap primer piping shall be same as specified for domestic water except all elbows shall be long radius type. Buried trap primer piping shall be type 揔� soft copper. No joints shall be allowed below slab except at connection to drain. Encase piping within 綌 thick un-slit flexible tube type elastomeric thermal insulation up 1� above slab. Insulation shall be AP/Armaflex or Rubatex Insul-Tube 180. Dielectric waterway fittings shall have a copper-silicon casting or a zinc electroplated steel pipe body with high temperature stabilized polyolefin polymer liner; manufactured by Victaulic, Style 647 or PPP, Inc. Series 19000, or Owner approved equal by Anvil. Dielectric unions shall be rated at 250 psi, ground-joint type with inert, non-corrosive thermoplastic sleeve. End connection materials shall be compatible with respective piping materials; manufactured by EPCO Sales, Inc or Watts. Provide models to suit applicable transitions. Dielectric flanges shall be rated at 175 psi, have nylon bolt isolators and dielectric gasket. Materials shall be compatible with respective piping materials; manufactured by EPCO Sales, Inc or Watts. Provide models to suit applicable transitions. Pipe joint compound shall be lead-free, non-toxic, non-hardening and compliant with ANSI/NSF 61 and Federal Specification TT-S-1732. Temperature service range of -15篎 to +400篎, manufactured by Hercules 揗egaLoc� or approved equal by Rectorseal, La-Co or Oatey. Refer to specification section 22 05 34 for heat tracing piping where exposed to freezing conditions. DOMESTIC WATER VALVES: (Includes Cold, Hot, Softened Water & animal watering) Similar types of valves shall be the product of one manufacturer; i.e., all butterfly valves shall be of the same manufacturer, all ball valves shall be of the same manufacturer, etc. Line Shut-Off Valves up to and including 2� shall be two-piece bronze body of ASTM B584 Alloy 844, ASTM B61, or ASTM B62, full port ball type rated at 600 WOG with threaded connections, blow-out proof stem, plastic coated lockable lever handle, Teflon packing, 316 stainless steel ball and stem. Acceptable valves are NIBCO Model T-585-66-LF, or approved equivalent model by Crane, Milwaukee or Apollo. Line Shut-Off Valves 2-1/2� and larger where system operating pressure will not exceed 160 p.s.i.g. shall be 200 WOG threaded lug type ductile iron body butterfly valve with extended neck, lockable lever handle, 416 stainless steel stem, aluminum bronze disc, EPDM liner and seal, suitable for bi-directional flow and dead end service with downstream flange removed. Acceptable valves are NIBCO Model LD-2000, or approved equivalent model by Keystone, Jamesbury, Milwaukee, Crane or Apollo. Line Shut-Off Valves 2-1/2� and larger installed within systems having design operating pressures between 160 and 250 p.s.i.g. shall be threaded lug type ductile iron body butterfly valve with extended neck, lockable lever handle, 316 stainless steel stem and disc, EPDM liner and seal, suitable for bi-directional flow and dead end service with downstream flange removed. Acceptable valves are NIBCO Model LD-3022, or approved equivalent model by Keystone, Jamesbury, Dezurik, Milwaukee, Crane or Apollo. Line Shut-Off Valves 2-1/2� and larger installed in roll grooved copper systems may be 300 psi roll grooved end type bronze body butterfly valve with lockable lever handle, aluminum bronze disc, with pressure responsive Grade CHP Fluoroelastomer seat, stem shall be offset from the disc centerline to provide complete 360-degree circumferential seating, suitable for bi-directional flow and dead-end service. Manufactured by Victaulic Series 608N or Anvil Model 6700. Provide stem extensions of a non-thermal conducting material for valves in insulated lines to allow unobstructed operation. Provide memory stops on all ball valves installed in domestic hot water return lines. Memory stops shall be adjustable after pipe insulation is applied. Provide line shut-off valves that have the same inside diameter of the upstream pipe in which they are installed. Domestic Hot Water Return Circuit Balancing Valves 1/2" through 3" - Self-contained fully automatic, constructed of type 303 stainless steel, rated for 200 psig maximum working pressure, thermal actuated, self-cleaning, spring loaded, designed for hot water system set to close at 140 degrees F (fully open at 130 degrees F), ANSI/NSF 61 certified, complete with check valve and lead free ball valve on inlet and outlet side of valve, manufactured by ThermOmegaTech 揅ircuitSolver� No. CSUA-3/4-XXX-CV-03, or approved equal. Refer to drawings for flow rate setting. Swing Check Valves, 2" and smaller - 揧� pattern bronze, Class 125, with threaded connections and screwin cap. Manufactured by NIBCO Model T-413-Y-LF or approved equivalent model by Milwaukee or Crane. Spring Loaded Check Valves, 2" and smaller - Silent closing, bronze, Class 125, with threaded connections, Buna disc, bronze or stainless steel spring. Manufactured by NIBCO Model T-480-LF or approved equivalent model by Milwaukee or Crane. Swing Check Valves, 2-1/2" and larger - 200 pound CWP, Iron body, with bronze or stainless steel trim. Manufactured by Apollo Model 910-LFA or approved equivalent model by Milwaukee or Crane. Swing Check Valves, 2-1/2" and larger - 285 pound CWP, Iron body, with stainless steel trim. Manufactured by NIBCO Model F-938-33-LF or approved equivalent model by Milwaukee or Crane. Spring Loaded Check Valves, 2-1/2" and larger - 200 pound CWP, Iron body, with bronze or stainless steel trim. Manufactured by NIBCO Model F-910-LF or approved equivalent model by Milwaukee or Crane. Spring Loaded Check Valves, 2-1/2" and larger - 400 pound CWP, Iron body, with bronze or stainless steel trim. Manufactured by NIBCO Model F-960-LF or approved equivalent model by Milwaukee or Crane. EXECUTION Examination Verify that excavations are to required grade, dry and not over-excavated. Do not install underground piping when bedding is wet or frozen. Before commencing work, check final grade and pipe invert elevations required for drain terminations and connections to ensure proper slope. PREPARATION Ream pipes and tubes. Remove burrs, scale and dirt, inside and outside, before assembly. Remove foreign material from piping. Prepare piping connections to equipment with flanges or unions. INSTALLATION Installation shall meet or exceed all applicable federal, state and local requirements, referenced standards and conform to codes and ordinances of authorities having jurisdiction. All installation shall be in accordance with manufacturer抯 published recommendations. General Care shall be exercised to avoid all cross connections and to construct the plumbing systems in a manner which eliminates the possibility of water contamination. Install all materials and products in accordance with manufacturer抯 published recommendations. Use tools manufactured for the installation of the specific material or product. Wipe all paste residue and excess solder from all solder joints. Heat generated by soldering procedures shall not be transmitted to valves, copper alloy roll groove fittings, copper press fittings, no-hub clamps, or any other components installed within the piping system that may be damaged due to high temperatures. Contractor shall take all precautions necessary, including utilizing wet wrapping or allowing heated piping to cool to ambient temperature before attachment. Pipe joints, no-hub clamps, flanges, unions, etc., shall not directly contact or be encased in concrete. Route piping in direct orderly manner and maintain proper grades. Installation shall conserve headroom and interfere as little as possible with use of spaces. Route exposed piping parallel to walls. Group piping whenever practical at common elevations. Install piping to allow for expansion and Contraction without stressing pipe, joints or connected equipment. Furnish all supports required by the piping included in this specification section. Penetrations through fire rated walls, floors and partitions shall be sealed to provide a U.L. rating equal to or greater than the wall, floor or partition. Seal all penetrations through floors, exterior building walls and grade beams air and watertight. Each plumbing pipe projecting through roof shall be installed in accordance with Contract Specifications and Drawings. Penetrations shall be sealed air and watertight. Refer to details on Contract Drawings and coordinate with General Contractor for flashing requirements. Furnish and install all necessary valves, traps, gauges, strainers, unions, etc. for each piece of equipment (including Owner furnished equipment) having plumbing connections, to facilitate proper functioning, servicing and compliance with code. Provide code-approved transition adaptors when joining dissimilar piping materials. Adaptors installed shall be manufactured specifically for the particular transition. All piping shall have reducing fittings used for reducing or increasing where any change in the pipe sizes occurs. No bushing of any nature shall be allowed in piping. Close nipples shall not be installed in plumbing piping systems. Bury outside water and drainage pipe minimum one foot below recorded frost depth. Buried piping shall be supported throughout its entire length. All excavation required for plumbing work is the responsibility of the plumbing Contractor and shall be done in accordance with Contract Documents. Piping shall be insulated in accordance with Contract Documents. Provide clearance for installation of insulation and for access to valves, air vents, drains, unions, etc. Provide dielectric isolation device where non-ferrous components connect to ferrous components. Devices shall be dielectric union, coupling or dielectric flange fitting. All piping shall be isolated from building structures, including partition studs, to prevent transmission of vibration and noise. Isolate all bare copper pipe from ferrous building materials. 揟ape is not an acceptable isolator. Drainage and Vent Systems Slope drainage lines uniformly at 1/4" per foot, for lines 3" and less, and 1/8" per foot for larger lines, unless noted otherwise on Contract Drawings. Maintain gradients through each joint of pipe and throughout system. Buried pipe shall be laid on a smoothly graded, prepared subgrade soil foundation true to alignment and uniformly graded. Bell holes shall be hand-excavated so that the bottom of the pipe is in continuous contact with the surface of the prepared subgrade material. Piping invert shall form a true and straight line. The size of drainage piping shall not be reduced in size in the direction of flow. Drainage and vent piping shall conform to the sizes indicated on the Contract Drawings. Waste lines from water closets shall not be smaller than four inches. Under no circumstances shall any drain or vent line below slab be smaller than two inches. Unburied horizontal cast iron soil piping shall be supported at least at every other joint except that when the developed length between supports exceeds four feet, they shall be provided at each joint. Supports shall also be provided at each horizontal branch connection and at the base of each vertical rise. Supports shall be placed immediately adjacent to the joint. Suspended lines shall be braced to prevent horizontal movement. Unburied vertical cast iron soil piping rising through more than one floor level shall be supported with riser clamps at each floor level. Install couplings for hubless pipe and fittings in accordance with manufacturer's published recommendations. Use pre-set torque wrench and tighten band screws as required by manufacturer抯 published instructions. All unburied change of direction fittings within the roof drainage system shall be braced against thrust. Bracing shall incorporate galvanized steel pipe clamps and tie rods. Provide cleanouts within sanitary waste systems at locations and with clearances as required by the code, at the base of each waste stack and at intervals not exceeding 75 feet in horizontal runs. Provide cleanouts at the base of each vertical downspout and at intervals not exceeding 75 feet in horizontal building storm drain. Provide clearances as required by code. Horizontal roof drain piping located above building ground floor level will not require cleanouts. A removable sink or lavatory p-trap with cleanout plug shall be considered as an approved cleanout for 2� diameter pipe. All interior cleanouts shall be accessible from walls or floors. Provide wall cleanouts in lieu of floor cleanouts wherever possible. A floor cleanout shall be installed only where installation of a wall cleanout is not practical. Provide a wall cleanout for each water closet or battery of water closets. Locate wall cleanouts above the flood level rim of the highest water closet but no more than twenty-four inches above the finished floor. Coordinate the location of all cleanouts with the architectural features of the building and obtain approval of locations from the Project Architect. Lubricate cleanout plugs with anti-seize lubricant before installation. Prior to final completion, remove cleanout plugs, re-lubricate and reinstall using only enough force to provide a water and gas tight seal. Install trap primer supply to floor drains, hub drains and floor sinks that are susceptible to trap seal evaporation and where indicated on Project Drawings. Primer unit installation shall comply with manufacturer's published recommendations. Trap primer lines shall slope to drain at a minimum 紨 per foot. Capped waste and vent connections for future extensions shall be located accessibly and not extend more than 24� from active main. Waste connections and vent connections shall be located at elevations that will allow future installation of properly sloped piping without the need to dismantle or relocate installed ductwork, piping, conduit, light fixtures, etc. Unless indicated otherwise within Contract Documents, all sanitary vent pipes passing through the roof shall be provided with lead roof flashings constructed of 2-1/2 pound sheet lead with bases extending no less than ten inches on each side of the pipe. The vertical portion of the flashing shall extend upward the entire length of pipe and be turned tightly inside the pipe at least two inches and shall not reduce the inside diameter of vent pipe more than the thickness of the flashing. Lead flashings shall be furnished by Plumbing Contractor and turned over to Roofing Contractor for installation. Locate all sanitary vent terminals a minimum of 25 feet horizontally from or 3 feet vertically above all air intakes, operable windows, doors and any other building openings. Wastewater when discharged into the building drainage system shall be at a temperature not higher than 140癋. When higher temperatures exist, approved cooling methods shall be provided. Domestic Water System On each water supply line serving a plumbing fixture, item of equipment, or other device which has a water supply discharge outlet below the overflow rim, or where cross contamination may occur, provide and install an approved vacuum breaker or backflow preventer. Installation of vacuum breakers shall prevent any possible backflow through them. Provide thrust blocking and clamps for mechanical joint or gasketed underground water pipe at fittings with 3/4" rods, and properly anchor and support. Restraining rods, clamps and hardware shall be thoroughly coated with bituminous material to prevent corrosion. Copper piping shall be supported at no greater than six-foot intervals for piping 1-1/2" and smaller and ten-foot intervals for piping 2" and larger in diameter. Install all water piping to allow all piping within the system to be drained at low points. Air chambers, dead-legs, or any other piping arrangement that may allow water to stagnate shall not be installed within domestic water systems. Valves installed for future connections shall not extend more than 24� from an active main. Provide manufactured water hammer arrestors in water supply lines as indicated on Contract Drawings and in accordance with Standard PDI-WH201. Pipe insulation shall be applied over installed freeze protection heat tracing tape. Install union type fitting downstream of isolation valves at equipment connections. Solder joint fittings shall not be installed within 24" of a copper press fitting. Identify piping utilizing copper press fittings in accordance with project specification section 20 05 53. Domestic Water Valves Domestic water shut-off valves shall be installed where shown on Drawings, at each fixture and piece of equipment, at each branch take-off from mains, at the base of each riser, and at each battery of fixtures. Install shut-off valves in accessible locations. Provide access panels where valves would otherwise be inaccessible. Coordinate quantity, size and location requirements of access panels with General Contractor. When altering or connecting to existing domestic water systems, verify that existing line shut-off valves provide positive isolation from the sections of piping serving areas outside of the Project Boundaries. Install new line shut-off valves where valves do not exist to provide positive isolation. Install shut-off valves with stems upright or horizontal, not inverted. Where threaded valves are installed in copper piping systems special care shall be taken to avoid damaging the valve or its parts due to overheating. Install copper or bronze male adaptors in each inlet of threaded valves. Sweat solder adaptors to pipe prior to connecting to valve body. Provide spring loaded type check valves on discharge of water pumps. Provide accessible check valves in the individual cold and hot water fixture supply lines serving mixing valve type faucets or assemblies having hose connection outlets that are not equipped with integral check stops. Install a shutoff valve immediately upstream of each strainer Install domestic hot water return circuit balancing valves where indicated on Contract Drawings and locate a minimum length of unrestricted straight pipe diameters downstream and upstream of all fittings and/or line shut-off valves as recommended by the valve manufacturer. Location of valves shall allow unobstructed access for monitoring and adjustment. Adjust and set domestic hot water return circuit balancing valves to flows indicated on Contract Drawings and in accordance with valve manufacturer抯 published instructions. Use flow meter recommended by valve manufacturer. Provide a line shut-off valve, strainer, temperature gauge and union, upstream of each hot water return circuit balancing valve. Provide check valve and isolation valve immediately downstream of each hot water return circuit balancing valve. TESTING and cleaning General Equipment, material, power, and labor necessary for the cleaning, flushing, sterilization, inspection and testing of systems covered within this Specification Section shall be furnished by the Plumbing Contractor. All testing and inspection procedures shall be in accordance with Division 01 and Special Condition requirements of this Contract. For any requested inspection, the Contractor shall complete prior inspections and tests to ensure that items are ready for inspection and acceptance by the Owner and/or Architect/Engineer. The Contractor shall be responsible for any and all costs incurred by Owner and/or Owner representatives, including consultants, resulting from a review or inspection that was scheduled prematurely. The Contractor shall conduct the tests and the Owner抯 Construction Inspector will witness and approve the results. Verify systems are complete, flushed and clean prior to testing. Isolate all equipment subject to damage from test pressure. Test and inspect for leaks and defects in new piping and parts of existing piping that have been altered, extended, or repaired. Piping being tested shall not leak nor show any loss in test pressure for duration specified. Leave piping uninsulated, uncovered and unconcealed until it has been tested and approved. Where any portion of piping system must be concealed before completion of entire system, the portion shall be tested separately as specified for the entire system prior to concealment. Contractor shall expose all untested covered or concealed piping. In cases of minor installation and repairs where specified water and/or air test procedures are deemed impractical, Contractor shall obtain written approval from Owner抯 Representative to perform alternate testing and inspection procedures. Alternate testing and inspection procedures for minor installation and repairs shall include visual evaluation of installed components by Owner抯 Representative during a simulation of use. The water utilized for tests shall be obtained from a potable source of supply. Prepare testing reports. If testing is performed in segments, submit separate report for each segment, complete with diagram or clear description of applicable portion of piping. After inspection has been approved or portions thereof, certify in writing the time, date, name and title of the persons reviewing the test. This shall also include the description of what portion of the system has been approved. Obtain approval signature by Owner抯 Representative. A complete record shall be maintained of all testing that has been approved and shall be made available at the job Site. Upon completion of the work, all records and certifications approving testing requirements shall be submitted to the Owner抯 Representative before final payment is made. Gauges used for testing shall have increments as follows: Tests requiring a pressure of 10 psi or less shall utilize a testing gauge having increments of 0.10 psi or less. Tests requiring a pressure of greater than 10 psi but less than or equal to 100 psi shall utilize a testing gauge having increments of 1 psi or less. Tests requiring a pressure of greater than 100 psi shall utilize a testing gauge having increments of 2 psi or less. Separately test above and below ground piping. Do not introduce test water into piping systems when exposure to freezing temperatures is possible. Do not introduce test water into sections of piping located above existing sensitive areas and/or equipment that may be damaged or contaminated by water leakage. Coordinate with Owner抯 Representative to determine areas and/or equipment considered as being sensitive. Defective work or material shall be reworked and replaced, and inspection and test repeated. Repairs shall be made with new materials. Pipe dope, caulking, tape, dresser couplings, etc., shall not be used to correct deficiencies. The Contractor shall be responsible for cleaning up any leakage during flushing, testing, repairing and disinfecting to the original condition any building parts subjected to spills or leakage. Drainage and Vent System Testing: Subject gravity drainage and vent piping and joints to a vertical water column pressure of at least ten feet. If after 12 hours the level of the water has been lowered by leakage, the leaks must be found and stopped and the water level shall again be raised to the level described and the test repeated until, after a 12-hour retention period, there shall be no perceptible lowering of the water level in the system being tested. This pressure shall be held for a test period of at least 15 minutes while being witnessed by the Owner's Representative. Portions of drainage and vent piping located on uppermost level of building shall be subjected to a water column pressure created by filling the system to point of overflow at roof vent terminals and roof drains. The pipes for the level being tested shall be filled with water to a verifiable and visible level as described above and be allowed to remain so for 12 hours. This pressure shall be held for a test period of at least 15 minutes while being witnessed by the Owner's Representative. Piping located above sensitive areas and/or equipment that may be damaged or become contaminated due to test water leakage shall be tested with air. Isolate the test section from all other sections and slowly fill pipe with oil-free air until there is a uniform gauge pressure of 5 pounds per square inch (34.5 kPa) or sufficient pressure to balance a 10-inch (254 mm) column of mercury. The air pressure shall be regulated to prevent the pressure inside the pipe from exceeding 5.0 PSIG. This pressure shall be held for a test period of at least 15 minutes. Any adjustments to the test pressure required because of changes in ambient temperature or the seating of gaskets shall be made prior to the beginning of the test period. This pressure shall be held for a test period of at least 15 minutes while being witnessed by the Owner's Representative. Test forced (pumped) drainage piping by plugging the end of the piping at the point of connection with the gravity drainage system and applying a pressure of 5psi (34.5 kPa) greater than the pump rating and maintaining such pressure for 15 minutes while being witnessed by the Owner's Representative. Should the completion of these tests leave any reasonable question of a doubt relative to the integrity of the installation, additional tests or measures shall be performed to demonstrate the reliability of these systems to the complete satisfaction of the Owner抯 Representative. Test plugs must extend outside the end of pipe to provide a visible indication for removal after the test has been completed. Cleaning and Flushing: During the Plumbing Systems Functional Performance Tests, each floor drain p-trap that has successfully passed pressure testing shall be proven clean and free of debris as follows: An inspection request shall be submitted to the Owner, identifying the quantity and location of drain(s) to be inspected. Vacuum out each floor drain p-trap in the presence of the Owner抯 Representative. A visual inspection of the trap shall be performed to verify that the trap is debris free. Perform a free-flowing test by pouring two five-gallon buckets of water down the floor drain. After the Owner抯 Representative has confirmed that the floor drain trap is clean and free of debris, ensure that the trap is filled with water. Install Trap Guard if required. At the discretion of the Owner抯 Representative, a visual inspection of the trap utilizing a sewer scope may be required in addition to, or in lieu of, a vacuum procedure. During the Plumbing Systems Functional Performance Tests, the Owner's Representative may require that any portion of the drainage, waste and vent systems installed under this Project Contract be proven undamaged, clean and free of debris. Verification of the interior condition of piping shall be accomplished utilizing a sewer scope or other method as determined by the Owner's Representative. Domestic Water System Testing: Subject piping system to a hydrostatic pressure of at least 125 pounds per square inch gauge, but not less than the operating pressure under which it is to be used, for a period of no less than 12 hours. During test period, all pipe, fittings and accessories in the particular piping system that is being tested shall be carefully inspected. If leaks are detected, such leaks shall be stopped, and the hydrostatic test shall again be applied. This procedure shall be repeated until no leaks are detected for an entire 12-hour period. This pressure shall be held for a test period of at least 15 minutes while being witnessed by the Owner's Representative. EXCEPTION: Piping located above sensitive areas and/or equipment that may be damaged or become contaminated due to test water leakage shall be tested with oil-free air in lieu of water. All domestic hot water systems that include a secondary copper/silver disinfection system shall be balanced and background copper testing completed prior to activation. Background copper (CU) content shall be less than 0.30 PPM. Obtain acceptance of the background copper results from MD Anderson Cancer Center representatives prior to start-up and commissioning of the secondary copper/silver disinfection system. Flushing, Cleaning and Disinfection: Where specified procedures are deemed impractical, Contractor shall obtain written approval from Owner抯 Representative to perform alternate flushing, cleaning and/or disinfection procedures. All active existing domestic water piping and plumbing fixtures within the Project Boundaries that will remain in service after completion of this Project shall be periodically flushed during the duration of the Project to insure potability and sanitation. Operate all plumbing fixtures and equipment that is connected to the domestic water system twice each week on Monday and Friday as follows: Flush each water closet and urinal. Flush water outlets (hot & cold) for a minimum of three minutes on each lavatory, sink, shower, drinking fountain, hose bib, and all other connected fixtures/equipment. All existing water piping within the Project Boundaries that will remain in service after completion of this Project and has been dormant for two weeks or longer shall be flushed and disinfected as required within this specification section. A bacteria test is not necessary for small scale work. However, disinfection is required. Examples of small-scale work are less than 20 feet of pipe, replacement and/or installation of a sink, drinking fountain, eyewash, backflow preventer, isolation valve, etc. Disinfect individual parts, fixtures, isolation valves, pipes, etc. by swabbing with full strength bleach (5.25%) or soaking for at least 30 minutes in a 500-ppm chlorine solution. The 500-ppm solution can be made by adding one part 5.25% bleach (household bleach) to 100 parts drinking water. For example, 3-1/2 ounces of bleach can be added to 2-1/2 gallons drinking water. Materials should then be thoroughly rinsed before putting into service. After completion of the testing, all new and/or altered water piping systems shall be thoroughly sterilized with a solution containing not less than 50 parts per million of available chlorine. Do not exceed 150 parts per million at any time. Introduce chlorine into the supply stream at a rate sufficient to provide a uniform concentration throughout the system. All outlets shall be opened and closed several times. When the specified level of chlorine is detected at every outlet in the system, close all valves to prevent release of water from the system for 24 hours. At the completion of the 24-hour disinfection period, test every outlet for a minimum chlorine residual of fifty parts per million. This minimum residual must be present to proceed with flushing. Flush the system with clean water at a sufficient velocity until the residual chlorine detected at every outlet is within 0.2 parts per million of the normal water supply抯 level. Sufficient samples must be taken no sooner than 24 hours after sterilization and flushing to represent the extent and complexity of the affected water system, along with a control sample to indicate municipal water quality at the time of testing. Send water samples to an accredited laboratory to perform qualitative and quantitative bacteriological analysis in accordance with AWWA C651. Contractor shall obtain written certification from the independent testing agency stating that the water samples meet Federal and State guidelines for safe drinking water. Upon satisfactory completion of all procedures, and receipt of acceptable laboratory test results, obtain written approval by Owner's representative. Failure to fully comply with the above procedures will result in a requirement to repeat the procedure until acceptable results are achieved, at no additional cost to the Owner. Isolate or bypass equipment that would be detrimentally affected by disinfecting solution. Isolate all other sections of the domestic water system not being disinfected to prevent migration of chlorine. Prior to injection of chlorine into the piping system, strategically place signs stating, 揌eavily Chlorinated Water - Do Not Drink�, and protect all outlets to prevent use during disinfection and flushing procedures. All domestic hot water systems that include a secondary copper/silver disinfection system shall be flushed as described within 3.04 C.2. b.1) for no less than 90 days prior to activation of the secondary copper/silver disinfection system. Maintain records of flushing procedure and submit to Owner for verification. training Obtain services of the copper press fitting manufacturer to provide on-site training for Contractor抯 field personnel in the use of pressing tools and installation of fittings. The manufactures representative shall periodically visit the jobsite and provide the contractor information concerning the best recommended practices in product installation. A distributor抯 sales representative is not considered qualified to conduct the training or jobsite visit(s). Obtain services of the grooved copper fitting manufacturer to provide on-site training for Contractor抯 field personnel in the use of grooving tools, application of groove, and installation of grooved end couplings. The manufactures representative shall periodically visit the jobsite and provide the contractor information concerning the best recommended practices in grooved product installation. A distributor抯 sales representative is not considered qualified to conduct the training or jobsite visit(s). 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