A. General provisions and other plumbing systems are specified in other Sections of Division 22.

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1 PART 1: GENERAL 1.01 DESCRIPTION: A. General provisions and other plumbing systems are specified in other Sections of Division 22. B. This Section covers plumbing water systems and equipment. C. See Section , Plumbing Fixtures for fixtures and trim. D. See Section , Drainage Systems for drainage, waste, and vent systems. E. See Section , Laboratory Systems for laboratory systems. F. Mechanical commissioning is specified in Section , Commissioning. This Section includes responsibilities and obligations in support of the commissioning process specified therein QUALITY ASSURANCE: A. Conform to the following: 1. ICC A International Energy Conservation Code International Plumbing Code B. Specialty piping joint certification: installers shall be certified by the manufacturer of the press fitting piping joint system, prior to any installation. PART 2: PRODUCTS 2.01 PIPING, FITTINGS, AND JOINTS: A. General: 1. Piping and fitting sizes listed are nominal inside diameter. B. Cold water, hot water, hot water circulating, and trap primer, underground, 2" and smaller: 1. Piping: copper tubing, type K, soft annealed, ASTM B Piping shall have no joints. C. Cold water, hot water, and hot water circulating, underground, 2.5" and larger: 1. Piping: copper tubing, type K, hard drawn, ASTM B Fittings: wrought copper, ASME B (R2005). 3. Joints: brazed with brazing filler metal, BcuP-3, silver-phosphorous, AWS A5.8/A5.8M D. Cold water, underground, 4": 1. Piping: ductile iron, cement lining, class 51, AWWA C , with AWWA C Fittings: ductile iron, 250 psig, AWWA C , with AWWA C cement lining. 3. Joints: mechanical with follower gland and bituminous outer coating. E. Cold water, hot water, hot water circulating, trap primer, and relief valve discharge, and tempered water, above grade, 0.5" to 2.5", except chromium-plated piping at fixtures: 1. Piping: copper tubing, type L, hard drawn, ASTM B MBAJ ARCHITECTURE #1007 / ETB # Advantage Valley Advanced Technology Center

2 2. Fittings: wrought copper and/or cast brass socket fittings, 0.5" to 2.5", ASME B (R2005). 3. Fittings: wrought copper press fittings, ASME B (R2005) with EPDM elastomeric O-ring seals, may be used at the Contractor's option for sizes 0.5" to 2". 4. Joints: a. Manufacturer: NIBCO Press, ProPress, or Elkhart XPress. a. Soldered with 95/5 tin/silver type, with a compatible flux designed to be cold water flushable in potable water systems, ASTM B and NSF a. b. Brazed with brazing filler metal, BcuP-3, silver-phosphorous, AWS A5.8/A5.8M c. Pressed type, using the tools and pressure requirements of the fitting manufacturer. F. Cold water, and hot water, above grade, 3" and larger: 1. Piping: copper tubing, type L, hard drawn, ASTM B Fittings: 3. Joints: a. For roll-grooved joints, 3" and larger: full flow standard radius, manufacturer supplied copper-tube dimensioned, roll-grooved of wrought copper. 1) Manufacturer: Anvil, Grinnell Mechanical Products, or Victaulic. a. Roll-grooved mechanical type made with alkyd enamel-coated ductile iron couplings, ASTM A (2009), with grade E EPDM or EHP synthetic rubber seal gaskets for an assembly rating for 300 psig. 1) Manufacturer: Anvil, Grinnell Mechanical Products, or Victaulic. G. Cold and hot water mains above grade, 2" and larger at the Contractor's option: 1. Piping: type 304 stainless steel, schedule 10, ASTM A312/A312M Fittings: type 304 stainless steel, schedule 10, full flow standard radius, and manufacturer supplied with roll-grooved ends. a. Manufacturer: Anvil, Grinnell Mechanical Products, or Victaulic. 3. Joints: roll-grooved mechanical type coupling cast of type 316 stainless steel, ASTM A403/A403M-2010a, with grade E, EPDM synthetic rubber flush seal gaskets for an assembly rating of 300 psig. a. Manufacturer: Anvil, Grinnell Mechanical Products, or Victaulic. H. Air intake piping for water heaters: 1. Piping: polyvinylchloride (PVC), schedule 40, ASTM D Fittings: socket-type PVC, schedule 40, ASTM D Joints: solvent-cement, ASTM D (2009e1). I. Flue vent piping for water heaters: 1. Piping: chlorinated polyvinyl chloride (CPVC), schedule 40, ASTM F441/F441M Fittings: socket type CPVC, ASTM F MBAJ ARCHITECTURE #1007 / ETB # Advantage Valley Advanced Technology Center

3 3. Joints: solvent cement, ASTM F SPECIALTY PIPING JOINTS: A. Unions: 2.03 VALVES, GENERAL: 1. For copper piping 2" or smaller: cast brass or bronze with copper soldered connections. 2. For steel piping 2" or smaller: ground joint with brass-to-iron seat. 3. For piping larger than 2": flange and gasket type. Flanges in steel piping shall be cast iron. A. Valves shall be of the same manufacturer, unless specified otherwise herein. B. Stem packing: asbestos-free GATE VALVES: A. Gate valves 3" and larger: class 125, iron body with bronze mountings, outside screw and yoke, bolted bonnet, solid wedge, renewable seats, flanged ends, 200 psig wog, MSS SP BALL VALVES: 1. Manufacturer: Crane 465.5, Kitz 72, Milwaukee F-2885-M, or NIBCO F617-O. A. For threaded steel or threaded and soldered copper piping, 2.5" and smaller: 2-piece bronze body, full port, with blowout-proof stem, rated for 400 psig wog. Valves shall have a chromium-plated vented ball, reinforced TFE seat, stuffing box ring, and soldered or threaded ends as applicable. Valves in insulated piping shall have 1.25" extended stems. 1. Manufacturer: Apollo, Hammond, Milwaukee, or NIBCO. B. For copper press fitting piping, 2" and smaller: 2-piece bronze body, full port, with blowout-proof stem, rated for 200 psig wog. Valves shall have a chromium-plated ball, reinforced TFE seat, stuffing box ring, grade E EPDM elastomeric O-ring seals, and press by press female ends. Valves in insulated piping shall have 1.25" extended stems. 1. Manufacturer: NIBCO PCF585-60, ProPress Ball Valve series, or Apollo 77W series. C. For stainless steel roll-grooved piping, 2" to 6": 2-piece stainless steel body, standard port, blow-out proof stem, rated for 700 psig wog. Valves shall have a 316 stainless steel ball, TFE seats, and roll-grooved ends. Valves in insulated piping shall have extended stems. Provide lever handle for valves 2" to 4" BUTTERFLY VALVES: 1. Manufacturer: Anvil 7500SS, or Victaulic 726S. A. For flanged piping: drilled and tapped lug type with cast iron body, nickel-plated ductile iron disc, EPT (EPDM) seat designed for service at 200 psig and 200 F, stainless steel shaft, permanently lubricated bushings on each end of the shaft, and conforming to MSS SP a. Operators shall be the lever and quadrant type for valves 4" and smaller, and manual handwheel gear type for valves 6" and larger. Butterfly valves shall be factory hydrostatically tested at 150% of operating pressure, factory-tested bubbletight at 150 psig disc differential, and shall be designed for dead-end service without a back-up flange. Butterfly valves shall be 3" and larger. 1. Manufacturer: Apollo 143 series, Crane 200 series, Kitz DJ series, or NIBCO N series. B. For copper roll-grooved piping: ductile iron or cast bronze body with a double-seated ductile iron disc with grade E EPDM elastomeric coating for a bubbletight closure to 300 psig. For sizes 3" and 4", provide with manual lever operator. MBAJ ARCHITECTURE #1007 / ETB # Advantage Valley Advanced Technology Center

4 1. Manufacturer: Anvil CTS series, Grinnell Mechanical Products B680, NIBCO GD4765, or Victaulic 608 series. C. For stainless steel roll-grooved piping: 2" and larger, cast stainless steel body with stainless steel disc, grade E EPDM seats, roll-grooved ends, and designed for a 300 psig bubble tight closure. Provide lever handle for valves 2" to 4" CHECK VALVES: 1. Manufacturer: Victaulic 763 series. A. Check valves 2.5" and smaller: class 125, bronze body, Y-pattern horizontal swing with renewable bronze disc and seat, screw cap, 200 psig non-shock cwp. 1. Manufacturer (solder ends): Crane S1340, Kitz 23, Milwaukee 1509, or NIBCO S Manufacturer (threaded ends): Crane T37, Kitz 22, Milwaukee 509, or NIBCO T-413. B. Check valves 3" and larger: class 125, iron body, horizontal swing with bronze trim, renewable disc and seat, bolted bonnet, flanged ends, 200 psig non-shock cwp. 1. Manufacturer: Crane 373, Kitz 78, Milwaukee F-2974A, or NIBCO F-918-B. C. Check valves 3" and larger: class 125, iron body, dual-disc wafer type with spring hinge, bronze disc, EPDM seat, 200 psig non-shock cwp STRAINERS: 1. Manufacturer: Kitz 7022, NIBCO W-920-W, or Stockham WG-961. A. Strainers 2.5" and smaller: class 125, bronze body, Y-pattern, with type 304 mesh stainless steel screen (with effective screening area of not less than 2 times the area of the pipe), threaded cap, 200 psig nonshock cwp. 1. Manufacturer (solder ends): Apollo YBS, Hammond 3040, Kitz 16, or NIBCO S-221-A. 2. Manufacturer (threaded ends): Apollo 59-YB, Hammond 3010, Kitz 15, or NIBCO T-221-A. B. Strainers 3" and larger: class 125, iron body, Y-pattern, with type 304 stainless steel screen (with effective screening area of not less than 2 times the area of the pipe), bolted cap, with blow-off plug and valve, 200 psig non-shock cwp HOSE BIBS: 1. Manufacturer: Apollo 125-YF, Hammond 3030, or Kitz 80. A. For all areas: polished chromium-plated with 0.75" inlet, tee handle, and built-in vacuum breaker HYDRANTS: 1. Manufacturer: Chicago 952, T&S B-0720, or Zurn Z-875L7. A. Wall Hydrants: 1. Non-freeze type with brass body and casing, 0.75" threaded inlet, 0.75" hose thread outlet, integral vacuum breaker, key handle, adjustable wall clamp, recessed box with hinged locking cover, and nickel bronze finish. a. Manufacturer: Josam 71000, Smith 5509 QT, Wade , or Zurn Z MBAJ ARCHITECTURE #1007 / ETB # Advantage Valley Advanced Technology Center

5 2.11 PRESSURE REDUCING VALVES: A. Direct operating low capacity type with bronze body, stainless steel spring, sealed spring chamber, stainless steel seat ring, composition disc, and conforming to ASSE Manufacturer: Apollo 36, Watts U5B, or Wilkins 70. B. Direct operating high capacity type with bronze body, stainless steel spring, sealed spring chamber, stainless steel seat ring, composition disc, and conforming to ASSE Manufacturer: Apollo 36H21X, Watts 223 SB, or Wilkins 500 YSBR BACKFLOW PREVENTERS: A. For cold water systems, 3" and larger: reduced pressure type assembly, same size as pipe unless otherwise indicated on the Drawings, with stainless steel working parts, complete with air gap drain device, strainer, check modules, isolation valves, test cocks, and relief module. Assemblies shall be stainless steel iron body with fused-epoxy coating. 1. Manufacturer: Apollo 4D-200, Watts 994, or Wilkins 375A. B. For cold water systems, 0.75" through 2": reduced pressure type assembly, same size as pipe unless otherwise indicated on the Drawings, with stainless steel working parts, complete with air gap drain device, strainer, check modules, isolation valves, test cocks, and relief module. 1. Manufacturer: Apollo , Watts 909, or Wilkins 975. C. Double check valve type for 0.25" to 0.375" sizes, for use at coffee, tea, and beverage dispensers. Units shall be inline spring loaded double check valve type, constructed of 316 stainless steel, shall meet FDA requirements for food service facilities, and shall comply with ASSE VACUUM BREAKERS: 1. Manufacturer: Watts Series 7, Wilkins 740, or Apollo 4N-300. A. Pressure type, same size as pipe, bronze body, complete with check valve, spring-loaded float disc, test cocks, atmospheric vent, and ball type isolation valves. 1. Manufacturer: Apollo , Watts 800QT, or Wilkins 720A. B. Atmospheric type, for noncontinuous pressure, same size as pipe, bronze body, complete with float disc, and atmospheric vent TRAP PRIMERS: 1. Manufacturer: Apollo , Watts 288A, or Wilkins 35. A. Automatic trap primer panels: factory-assembled packaged trap primer manifold with atmospheric vacuum breaker, preset 24 hour timer set for 10 seconds (minimum) operation every 24 hours, manual override switch, 120 V solenoid valve, 0.75" inlet connection, 0.5" outlet compression fittings, water hammer arrester and enclosed in a 16 gauge steel cabinet with prime coated access door. 1. Manufacturer: Precision Plumbing Products Prime-Time Manifold. B. Automatic mini trap primers: electronic trap primer with distribution unit, 1" air gap, preset 24 hour timer set for 10 second minimum operation every 24 hours, manual override switch, fuse, 120 V solenoid valve, 0.5" inlet connection, and 0.5" outlet compression fittings. 1. Manufacturer: Precision Plumbing Products Mini-Prime, or Zurn Z-1020-ETP. MBAJ ARCHITECTURE #1007 / ETB # Advantage Valley Advanced Technology Center

6 2.15 WATER HAMMER ARRESTERS: A. Enclosed piston type with copper tubing enclosure, O-ring seals, threaded connections, ASSE certified PRESSURE GAUGES: 1. Manufacturer: Ancon, Precision Plumbing Products, Sioux Chief, or Watts. A. Bourdon tube type with metal case, 4.5" dials, accuracy within 1% of full scale range, equipped with snubbers and brass needle valves for 250 psig swp. Gauges at shall be liquid-filled. Location Inlet of pressure reducing valves Outlet of pressure reducing valves B. Manufacturer: Ashcroft, Marsh, Trerice, Weiss, or Weksler THERMOMETERS: 0 to 200 psig. 0 to 100 psig. Range A. Blue- or green-reading organic-filled every-angle, industrial type with aluminum case, glass lens, 9" scale length, and accuracy rating of ± one scale division. Thermometers installed in insulated piping shall have 6" stems with brass thermowell, filled with heat transfer medium, and extension. B. Scale range: 30 F to 240 F. C. Manufacturer: Trerice BX9-SPB, Weiss A9VU, Weksler EG5L-9, or Winters 9IT WATER HEATERS: A. Gas-fired, condensing-type vertical, prewired, UL listed, skid-mounted, packaged storage type with removable powered burner having induced draft blower, steel tank, copper-clad firetubes, flue baffles, anticorrosion barrier, condensate neutralizing device, ASME and CSA pressure and temperature relief valve, controls and enclosure, meeting requirements of ASHRAE/IESNA Tanks: nickel-lined, designed, constructed, certified, and stamped in accordance with ASME BPVC-VIII for a 150 psig working pressure, with flame inspection port, center flue outlet, handhole cleanout, and drain valve. 2. Controls: FM controls, UL 795-compliant gas train, electronic flame safeguard with pre- and postpurge, burner-lockout indicating light, programmable electronic operating control with digital temperature readouts and connectivity to building automation system with alarm on any failure notification, cable for connection to building automation system, CSD-1 compliance package with manual reset high limit and electronic low-water cutoff, combustion air interlock, air intake assembly for remote combustion air including air intake vent termination cap, redundant gas valve, immersion thermostat, temperature limiting device, high pressure protective device, electronic flame monitoring, combustion sequence indicating lights, stack temperature limiting switch, direct spark ignition, switched contacts for remote flame failure notification, and vent termination cap for flue. 3. Enclosures: minimum 2" thick, heavy density fiberglass insulation, and steel jacket with industrial-grade finish. 4. Water heater shall be supplied with a minimum 10-year warranty on the storage tank and a minimum 5-year warranty on the heat exchanger. 5. Manufacturer: PVI Power VT HOT WATER CIRCULATING PUMPS: A. Single-stage bronze inline cartridge type, fluid lubricated, with spherical rotor impeller, and magnetic drive. 1. Manufacturer: Armstrong, Bell & Gossett, Grundfos, or Taco. MBAJ ARCHITECTURE #1007 / ETB # Advantage Valley Advanced Technology Center

7 2.20 HOT WATER CIRCULATING PUMP CONTROLLERS: A. Time switch with a 24-hour dial, day-omitting device, self-starting synchronous motor, and removable on-off trippers. B. Provide with a NEMA 1 enclosure finished with a baked epoxy paint coating, 0.5" and 0.75" knockouts on bottom, sides and back, and provisions for locking or sealing. C. Provide a spring-driven reserve to operate the time switch contacts for at least 16 hours after power failure. On restoration of power the time switch shall transfer to the motor drive and automatically rewind the reserve. D. Provide with surface-mounted thermostat. E. Manufacturer: Tork 7000L series HOT WATER CIRCULATING FLOW CONTROL FITTINGS: A. Automatic Flow Control Fittings: 1. Flow regulator type fittings with a brass body, removable factory preset flow balancing cartridge and orifice regulator, and stainless steel and brass flow elements. Flow rates shall be controlled to within ±5% of factory preset flow rate over varying pressure ranges. Trim fittings with a union connection, ball valve, and threaded or soldered ends. 2. Manufacturer: Autoflow AC series, Griswold Flowcon series, or Nexus Valves Ultra Matic UM HOT WATER CIRCULATING FLOW METER: A. Inline brass body flow meter fittings with an accuracy of ±5%, and operating parameters of 175 psig at 200ºF. Meters shall be mountable in both horizontal and vertical positions. B. Manufacturer: Kobold VKP THERMAL EXPANSION TANKS: A. Free-standing, vertical type with FDA approved fixed butyl bladder type designed for potable water. Tanks shall be precharged at a minimum of 30 psig for shipping, and shall have stainless steel connections. Tanks shall be welded carbon steel, constructed in accordance with ASME BPVC-VIII Tanks shall have a primed and painted exterior, and shall be designed for a maximum operating temperature of 240ºF and a minimum of 125 psig working pressure. B. Manufacturer: Amtrol, Apollo, Bell & Gossett, Taco, Thrush, or Watts MIXING VALVES: A. Building master mixing valves: high/low mixing valve assembly with bronze body, self-contained, thermostatically controlled mixing valves with adjustable setpoints, check-stop inlets, union inlet and outlet connections, dial thermometer on discharge and copper piping. High/low assemblies shall have a minimum flow rate of 0.5 gpm and include a single valve or 2 mixing valves in parallel and an intermediate pressure reducing valve (if required by the manufacturer) with pressure gauges. Assembly shall be factory assembled and tested in accordance with ASSE Provide a satin spray finish to the completed assembly. 1. Manufacturer: Leonard TM Hi/Low series, Symmons 5 Hi/Low series, Lawler 800 series, or Bradley S series EMERGENCY FIXTURE WATER TEMPERING VALVES: A. Single shower/eye washes: thermostatic type complete with inlet checks, stops with unions, outlet thermometer, and vandal-resistant temperature setting. Each valve shall be designed for use with emergency eye/face washes, and be factory set for 85 F at 20 gpm with 30 psig inlet water pressure. Units shall be designed to flow full cold in the event of hot water supply failure or thermostatic controller failure, and designed to stop flow completely in the event of cold water supply failure. MBAJ ARCHITECTURE #1007 / ETB # Advantage Valley Advanced Technology Center

8 1. Manufacturer: Lawler 911, Leonard TM-600, or Bradley S FLEXIBLE CONNECTORS: A. As specified in Section , General, for pressure and temperature of intended service WATER METERS: A. AWWA C turbine type, registration in gallons, remote display, brass body, with flanged or union connections and integral strainer. Meter's display shall be provided with pulse transmitter having remote contact for connection to the building automation system ACCESSORIES: A. Gaskets in water piping: 0.063" thick red rubber or asbestos-free composition sheet type, selected for the pressure, temperature and service of the specific joint. B. Bolts and nuts: ASTM A b, Grade B. C. Water pressure relief valves: ASME rated, bronze body construction with a stainless steel spring, and renewable seat. 1. Manufacturer: Mason-Neilan, Watts, or Wilkins. D. Vacuum relief valves: bronze body with silicone disc. Rated for 200 psig working pressure and 250 F working temperature. Valves shall open at less than 0.5" Hg vacuum. Valves shall be AGA approved and shall be constructed in accordance with ANSI Z /CSA 4.4-M99, Addenda ANSI Z21.22a-b /CSA 4.4a-b Manufacturer: Mason-Neilan, Watts, or Wilkins. E. Temperature and pressure relief valves: automatic reseating pressure and temperature relief type with bronze body and nonmechanical seat-to-disc alignment. Valves shall be AGA approved and shall be constructed in accordance with ANSI Z /CSA 4.4-M99, Addenda ANSI Z21.22a-b /CSA 4.4a-b PART 3: EXECUTION 1. Manufacturer: Mason-Neilan, Watts, or Wilkins GENERAL PIPING INSTALLATION: A. General: 1. Piping shall be cut to measurements established at the site and worked into place without springing or forcing. 2. Use concentric reducing fittings between different size pipes. 3. Ream steel, brass and copper pipe after cutting, turn on end and knock loose dirt, scale, and filings from interior of pipe. 4. Slope water piping to drain back to the mains. B. Underground: 1. Install water piping outside the building in trenches separate from sewers. 2. Excavation and backfill: as specified in Section , General. 3. Underground piping shall be connected to the exterior service line, or capped or plugged if the exterior service is not in place. MBAJ ARCHITECTURE #1007 / ETB # Advantage Valley Advanced Technology Center

9 4. Block ductile iron water pipe with concrete poured in contact with undisturbed earth. Provide tie rods for outside joints. 5. Piping installed below a footing's bottom elevation shall be installed a minimum of 12" horizontally from the footing for each 12" of depth below the footing. C. Aboveground: 1. Piping shall be installed to permit free expansion and contraction without damage to joints, hangers, or the building. Arrange piping to minimize stresses caused by expansion and contraction. 2. Group exposed pipe together and arrange control valves at fixtures for ease of operation. 3. Install piping so as to preserve access to valves and equipment and to provide the maximum headroom possible. 4. Provide offsets to maintain ceiling height and to coordinate with other trades. 5. Install exposed piping such that when insulation is applied it will not come in contact with adjacent surfaces. 6. Provide extra heavy pipe for nipples in schedule 80 galvanized steel piping systems, and for nipples where unthreaded portion of pipe is less than 1.5" long. D. Piping Joints: 1. General: a. Isolate joints between dissimilar metals and connections to tanks with dielectric fittings. b. Provide flanges or unions at connections to valves and apparatus. c. Install mechanically grooved couplings in accordance with the manufacturer's instructions. 2. Solder joints: pipe ends shall be cut square, deburred, cleaned and assembled in accordance with ASTM B Threaded joints: screw-thread joints shall be made with cut tapered threads. Joints shall be made tight with Teflon tape. Not more than 2 threads shall show after the joint is made tight, except no threads shall show in exposed chromium-plated piping. 4. Flanged joints: except at connections to equipment, flanged joints shall be made with ring type gaskets, extending to inside of bolt holes. Flanged connections to equipment shall be made with full-face gaskets to match flanges on equipment. 5. Press fitting joints: shall be made using the manufacturer's specific equipment for the piping joint being made, and by manufacturer trained personnel. Each pipe end shall be abutted full length into the fitting and marked accordingly. 6. Roll-grooved fitting joints: shall be made by cutting the pipe ends square and leaving the ends without any burrs, roll marks, indentions or projections. The roll-groove shall be made by impressing a cold formed groove of uniform depth into the pipe wall, at the cut end, by a factory trained technician using a manufactured grooving machine designed for the task. 7. Roll grooving for schedule 10 stainless steel piping shall be made using a Victaulic RX style roll set COPPER TUBING AND FITTINGS: A. Noninsulated piping installed in masonry construction shall be painted 2 coats of asphaltum paint. B. Clean, prime, and paint exposed non-insulated piping with 2 coats of glossy silver paint. MBAJ ARCHITECTURE #1007 / ETB # Advantage Valley Advanced Technology Center

10 3.03 POLYVINYL CHLORIDE PIPE AND FITTINGS: A. Piping, fittings, and couplings shall be joined with PVC cement. Piping, fittings, and couplings shall be cleaned with purple primer before applying cement. B. Piping joints shall be in compression during the cement setting time, in accordance with manufacturer's requirements CHLORINATED POLYVINYL CHLORIDE PIPE AND FITTINGS: A. Piping, fittings, and couplings shall be cleaned with solvent and joined with PVC cement SPECIALTY PIPING JOINTS: A. Unions: 1. Provide in each connection to each piece of equipment, except where flanges are used, so it may be removed VALVES GENERAL REQUIREMENTS: A. Provide a gate valve in the cold water service line near the point of entrance into the building. On the building side and near the gate valve, install a drain leg with 0.75" hose bib. B. Provide a valve in each water supply connection to each wall hydrant and each piece of equipment. C. Provide valves in supply connections to each sink and water cooler. D. Butterfly valves may be used in lieu of gate valves indicated on the Drawings in systems operating at maximum operating pressure of 150 psig AUTOMATIC FLOW BALANCING VALVES: A. Install strainer valve upstream of automatic flow balancing valve STRAINERS: A. Install in the inlet to each pump, pressure reducing valve, flow control valve, thermostatic mixing valve, emergency fixture mixing valve, backflow preventer, and as indicated on the Drawings or specified herein HYDRANTS: A. Wall Hydrants: 1. Install 18" above finished grade BACKFLOW PREVENTERS: A. Drain line from each unit shall be DWV copper run full size to floor drain VACUUM BREAKERS: A. Pressure Type: 1. Install where water flow is continuous. 2. Install a minimum of 12" above the overflow level of the device being served. B. Atmospheric Type: 1. Install where water flow is intermittent. 2. Install a minimum of 6" above the overflow level of the device being served. MBAJ ARCHITECTURE #1007 / ETB # Advantage Valley Advanced Technology Center

11 C. Install where spillage of water will not cause damage to room surfaces or equipment TRAP PRIMERS: A. Connect trap primer lines to the drain tailpieces where field conditions prohibit connection to the trap primer connections on the drain bodies. B. Install trap primers with a straight downward slope to allow drainage from the trap primer valve THERMOMETERS: A. Thermometer stems shall be installed in pipe tees with the stem in the water way flow stream. Thermometers shall be located so as to be easily read from 4.5' above the floor PRESSURE GAUGES: A. Install at the inlet and outlet of each pressure reducing valve WATER HEATERS: A. Install heaters level and stable HOT WATER CIRCULATING PUMPS: A. Support pumps independently from piping by mounting at 48" above floor on wall with an angle iron frame. B. Do not restrain motor from floating on frame HOT WATER CIRCULATING PUMP CONTROLLERS: A. Set to turn the circulating pump on at 6:00 am and run for14 hours. B. Coordinate the day-omission setting with the Owner THERMAL EXPANSION TANKS: A. Support tanks with hangers independently from adjacent piping or on the floor where floor bases are provided MASTER MIXING VALVES: A. Connect master mixing valves to the piping systems per the manufacturer's published installation recommendations. B. Secure each master mixing valve assembly to a backboard on the wall EMERGENCY FIXTURE WATER TEMPERING VALVES: A. Valves shall be accessible to read thermometers and adjust temperature setting as required. B. Install a strainer in the cold and hot water supplies, and a union at each connection. C. The outlet water temperature shall be certified at 85ºF with 1 emergency shower flowing full ROOF PENETRATIONS: A. Flash and counter-flash pipes passing through the roof with 4 psf sheet lead, not less than 18" square PIPING TESTS: A. Test cold water, hot water, and hot water circulating systems piping by capping all openings and applying a hydrostatic pressure of 125 psig for 1 hour without any drop in pressure. Disconnect the pump source MBAJ ARCHITECTURE #1007 / ETB # Advantage Valley Advanced Technology Center

12 prior to and during testing. Where a system is tested in sections, each section shall be subjected to the same test. B. Piping General: 1. Test piping under floor slabs before slabs are poured. 2. Tests shall be made while piping and joints are exposed to view. 3. Submit a statement certifying that piping and joints are tight and have passed the specified test. C. Piping Test General: 1. Screwed and flanged joints that leak shall be taken apart and reassembled. 2. Soldered and brazed joints that leak shall be taken down and replaced CLEANING AND DISINFECTION: A. Domestic Water Piping: 1. Clean and disinfect inside water piping prior to placing the system in operation. 2. Purge domestic cold water, and hot water and hot water circulating piping, including heaters, pumps, tanks, and fixtures. 3. Flush the piping systems with potable water from the municipal supply system until water runs clear. 4. Fill the system with clean water with a water/chlorine solution containing a minimum 50 ppm chlorine. Isolate the piping systems and allow to stand for 24 hours. 5. Drain the systems and refill with a water/chlorine solution containing a minimum 200 ppm chlorine. Isolate the piping systems and allow to stand for 3 hours. 6. Flush the systems with clean, potable water from the municipal supply system until the chlorine in the system is the same level as the municipal supply system. 7. Submit water samples for biological examination by laboratories approved by the local health authority. Samples shall be taken in the presence of the Owner. 8. Repeat the procedures and resubmit water samples as required to pass the biological test. Minimum acceptance test results shall be 0.0 colonies of coliform bacteria. 9. Provide results of tests. 10. Materials and test methods shall comply with AWWA C B. Strainers: after final flushing of the water system, remove strainer baskets for cleaning and disinfection. Reinstall baskets and ensure that caps are leak tight TESTING AND BALANCING OF THE HOT WATER AND HOT WATER TEMPERATURE MAINTENANCE SYSTEMS: A. Hot Water System: 1. Following the installation of the piping systems, energize the water heaters and circulation pumps, and bring the piping systems up to operating temperatures. 2. Flow the hot water system and test that the correct water temperature is flowing from each hot water outlet. Make adjustments as required to the water heaters and mixing valves. MBAJ ARCHITECTURE #1007 / ETB # Advantage Valley Advanced Technology Center

13 B. Hot Water Temperature Maintenance - Circulation Systems: 1. Allow the hot water system to stand for one hour with only the circulation pump running before balancing the system. 2. For automatic flow control fittings, (pre-set from the manufacturer) verify that the accumulated flow is returning to the water heater. If flow is lower than indicated on the Drawings, remove and clean the flow control fittings. 3. Perform water temperature spot checks at each branch take-off from the hot water system main. END OF SECTION MBAJ ARCHITECTURE #1007 / ETB # Advantage Valley Advanced Technology Center