University of Nevada, Reno Campus Design & Construction Standards
DIVISION 22: PLUMBING BASIC REQUIREMENTS General All Plumbing systems designs shall comply with the requirements of the most currently adopted editions of the following codes, regulations, and references: International Building Code Uniform Mechanical Code Uniform Plumbing Code B31.1 Power Piping Code ASHRAE Handbooks ASHRAE Standards Model Energy Code National Uniform Seismic Installation Guidelines ASPE Data Books NAC Chapter 618 (Boilers and Pressure Vessels) Americans with Disabilities Act The American National Standard for Accessible & Usable Buildings & Facilities Local codes and ordinances as may be applicable Energy Conservation All HVAC systems designs shall comply with the requirements of the Model Energy Code (most current edition). The Model Energy Code requires compliance with (defers to) ASHRAE/IES Standard 90.1 for all commercial building construction. In accordance with NRS 338.190, prior to the construction or renovation of any public building with a gross floor area greater than 20,000 square feet, a detailed life cycle cost analysis, including the cost of operation and maintenance, must be completed. The study shall identify measures for the conservation of energy (and shall consider the use of alternate non-fossil fuels when applicable). The analysis shall include comparisons of at least three different HVAC system types. The three different system types to be evaluated shall be reviewed and approved by the University Facilities Services Mechanical Engineer prior to beginning the analysis. A separate narrative shall be provided outlining the building envelope insulating values (for walls, glass, roof, etc.) and specific HVAC system components (i.e., plate and frame heat exchangers, variable frequency drives, compensating type kitchen exhaust hoods, etc.) as they relate to energy conservation.
220000 -BASIC MATERIALS AND METHODS All equipment, ductwork, and piping shall be braced for the applicable seismic zone. Seismic bracing requirements shall be specifically identified in the Contract Documents (such that bracing requirements and/or methods are not merely left to the discretion of the Contractor). Waste and Vent: Shall be cast iron inside the building and to a distance 5 feet outside the building. DMV copper pipe and fittings may be substituted for waste and vent lines 2” and smaller. Acid waste and vent to be “Lab Line” pipe and fittings. Potable water supply lines shall Facilities Services Department Revised 2013
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University of Nevada, Reno Campus Design & Construction Standards be Type L copper. All waste lines into indirect wastes shall have an air gap of a minimum of 1 inch above the overflow rim. All solder or low fusion joints MUST be lead free. All mechanical room floor drains and floor sinks shall be 4” diameter. Wherever a plumbing pipe penetrates a concrete floor slab the pipe shall be protected with a minimum of 1/2” thick insulation (typically closed cell elastomeric type insulation). Where site conditions warrant, pipe sleeves and water-tight seals shall be specified at each penetration. Water hammer arrestors shall be provided as required to protect against noise and damage from water hammer (sizes and locations shall be in accordance with UPC, chapter 6). Accessible shut-off valves shall be installed to allow for isolation of groups of plumbing fixtures, restrooms, and each floor of multi-floor buildings for all piping systems. A shut-off valve and pressure reducing valve with full size bypass shall be installed on the domestic cold water riser in each building. All boiler and cooling tower feeds must be equipped with approved back flow preventer 220719 – PIPING INSULATION Refrigerant suction piping shall be insulated with closed cell foam insulation as manufactured by Armaflex. All insulation installed outdoors shall be protected with an aluminum jacket. All refrigerant piping insulation installed indoors shall have a smoke / flame spread rating of at least 25/50.
221100 - PIPES AND TUBES Plastic pipe shall be limited inside of buildings as follows: For reverse osmosis/de-ionized laboratory water systems virgin, unpigmented polyvinylidene fluoride pipe (PVDF) ASTM 3222, schedule 80 shall be specified. Fittings shall be unpigmented polyvinylidene fluoride pipe (PVDF)m schedule 80, socket fusion type joints. For laboratory waste piping acid resistant, schedule 40 flame retardant polypropylene pipe per ASTM F1412 and ASTM D4101 shall be used except in return air plenums, which requires schedule 40 polyvinylidene fluoride pipe (PVDF) per ASTM F1673 and ATM D3222. Fittings to be schedule 40, no-hub or electrofusion depending on access to the piping. Electrofusion joints required were access to fittings is not practical. All polyvinylidene fluoride pipe (PVDF) to meet ASTM E-74 and UL 723 requirements for flame spread and smoke generation. Victaulic (grooved) couplings are not acceptable for heating hot water, condenser water and chilled water piping. All heating hot water, chilled water and condenser water piping 4 inch diameter and above shall be ASTM A53 welded carbon steel pipe. Piping less than 4 inches shall be type L copper. No 5 inch diameter piping shall be specified.
221100 – PIPING SPECIALTIES Facilities Services Department Revised 2013
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University of Nevada, Reno Campus Design & Construction Standards Ball Valves shall be full-port. Air and dirt separators shall be manufactured by Spirotherm. Air vents shall be Sprirotherm Spiro-Top brass air vents, or equal by Thrush.. All dielectric piping separations shall be made with clear flow nipples. Bronze fittings are not an acceptable separation. Dielectric unions will only be approved on a case-by-case basis. 221119 – PLUMBING SYSTEMS (BACKFLOW PREVENTION) General The domestic cold water service to each building shall incorporate a reduced pressure backflow preventer to protect the water supply from backflow. The reduced pressure backflow preventer shall be located as directed by Facilities Services Department and shall conform to Truckee Meadows Water Authority. See Drawings for Backflow Prevention Assemblies Detail Drawings External Horizontal (221113-1) Irrigation Horizontal Retrofit Only (221113-2) Irrigation Horizontal (221113-3) External Horizontal Above Ground (221113-4) External Horizontal Below Grade (221113-5) Internal Basement Installation (221113-6) Internal Horizontal (221113-7) Assemblies Internal Vertical (221113-8) External Horizontal (221113-9) Internal Horizontal (221113-10) Manifold for Parallel Backflow Assemblies (221113-11) Air Gap Separation (221113-12) 221119 -FIRE PROTECTION The fire sprinkler water service to each building shall incorporate a double check detector assembly or a reduced pressure backflow preventer to protect the water supply from backflow. The selected device shall be located as directed by TMWA and Facilities Services. 221123 – CENTRIFUGAL PUMPS Facilities Services Department Revised 2013
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University of Nevada, Reno Campus Design & Construction Standards Centrifugal pumps shall be horizontal, end-suction type or horizontal in-line type. Impellers to be bronze, pump casing to be cast iron. Mechanical shaft seals shall be specified. All shaft bearings to be ball bearings with AFBMA L10 life of 100,000 hours. Suction and discharge connections to be 125# flat face flanges. Pump impeller shall be selected for best efficiency and be between 50% and 80% of the maximum impeller diameter. Pump speed shall be 1750 or 3600 RPM, direct driven by squirrel cage, induction motor, open drip proof type. Motors shall have a 1.15 service factor. Pump accessories shall include a triple duty valve on the discharge and flexible connections on both the inlet and outlet connections. Pumps shall have a low point drain connection and high point air release connection, minimum 3/4” NPT. All base pumps shall be laser aligned after installation and before start up. 221123 - PROCESS PIPING All refrigerant piping shall be ACR hard drawn copper with wrought fittings. All fittings shall be long radius. All piping shall be brazed using silver solder or sil-phos. Piping shall be on a nitrogen purge during welding. No manufactured soft-drawn line sets will be accepted. PLUMBING FIXTURES AND TRIM General The minimum number of plumbing fixtures shall be in accordance with table 4, chapter 4 of the 2012 Uniform Plumbing Code (UPC). All plumbing fixtures shall be specifically designed to conserve water. Water usage by specific fixture type shall be as follows: Water Closets Urinals Lavatories Sinks Showers
1.6 gallons per flush 0.5 gallons per flush 2.0 gallons per minute 2.5 gallons per minute 2.5 gallons per minute
Exterior hose bibbs shall be installed on all sides of buildings. Manufacturer: Zurn or Woodford. Water closets shall be wall-mounted type (except in remodel construction where existing wall or chase space does not allow for wall-mounted type) unless written authorization is obtained from the University Facilities Services Department allowing floor-mounted water closets. Fixtures All industrial and potable water fixtures/systems must have backflow preventers that meet TMWA, Washoe County Health Codes and be on a backflow preventer list. (A copy can be obtained from TMWA backflow department.) All faucets with any possibility of back-siphon into potable water must be equipped with vacuum breakers. Water Heaters: State or A.O. Smith Backflow Preventers: Watts, FEBCO or AMES Facilities Services Department Revised 2013
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University of Nevada, Reno Campus Design & Construction Standards Lavs, Water Closets, and Urinals: American Standard Medical Surgeons Lav: American Standard 9010.018 or 9012.14 with concealed arms and American Standard 2238.269 gooseneck faucet. Service Sink: American Standard 8349.242 with vacuum breaker or American Standard 8341.075 with vacuum breaker. Stainless Sinks: Minimum of #18 1.2mm gauge type 304- 18-8 stainless sinks. Water Cooler: Haws barrier free water cooler HWBFA8 (need two drinking fountains to comply) Sun Roc Barrier Free HCWC-8, NWCA-5, NCWA-8, dual fountain SRF 3700. Hydration Station: HAWS Touch Free Hydration Station – This system encourages people to fill their own non-disposable water bottles and promotes sustainable action by reducing the negative environmental impacts of plastic disposable water bottles. Note: this does not alleviate the requirement for water fountains. Floor Drain Trap Primers: Within restrooms use Sloan Vacuum Breaker Trap Primer, Model # VBF-72-A. Where water is not close to floor drain, use Pro Set Trap Guard. All other applications require a Prime-Time electronic trap priming system PPP model PTS-4 manifold system. Laboratory Drainage/Waste Piping: Piping to be Polyvinylidene Fluoride PVDF piping. PVDF manufactured per ASTM E-84 and UL 723. Automatic Devices – “TO BE SPECIFIED FOR ALL NEW CONSTRUCTION” Automatic flushometers for urinals: 120 volt models Moën M-Power, Model # 8311 chrome 1 -1/2” closet ac powered sensor-operated flush valve Sloan Royal Model Optima 186-.05 ES-S OPT with Sloan EL 154 120 volt transformer or equal Battery powered models: Sloan Royal Model Optima Plus 8186-.05 MC or equal Automatic flushometers for water closets: 120 or 240 volt Models Moën M-Power, Model # 8311 Chrome 1 -1/2” closet ac powered sensor-operated flush valve Sloan Royal Model Optima 110 ES-S Sloan Royal Model Optima 111 ES-S Battery powered models: Sloan Royal Model Optima Plus 8110 Sloan Royal Model Optima Plus 8111
Automatic faucets for lavatories: Facilities Services Department Revised 2013
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University of Nevada, Reno Campus Design & Construction Standards 120 or 240 volt models Welcome Model H-1000 Sloan Optima Systems ETF-600 No Symmons faucets or valves will be accepted Battery Powered Models: Welcome model H-100 Sloan Optima Systems EBF-650 Manual Devices Manual Devices are to be used only with written approval from Facilities Services. Water Closet Flush Valves: Sloan-Royal 110-3, 1-inch I.P.S., screw driver back-check, angle stop protective cap, adjustable tailpiece, vacuum breaker flush connection and spiral coupling for 1 ½ inch top spiral, wall and spiral flanges. Urinal Flush Valve: Sloan-Royal Model Optima Flushometer Model 186-0.5. Lavatory: 4” center Moen Chateau model 4635 or 4621. Lever handle: Moen L4601. Kitchen Lav: 8” center Moen Chateau model 7531, 7841, or 7831. Handicapped wrist blade: 4” center Moen ADA 8810 or Moen ADA high-rise 8938. Scullery sink fitting: Chicago 445 models. Shower Valves 3 port: Moen Chateau 2600 (valve only, Moen Chateau 2605 (shower valve set) 4 port: Moen Chateau 2700 (valve only), Moen Chateau 2725 (shower valve set) 223330– DOMESTIC HOT WATER HEATERS For buildings with significant domestic hot water loads (such as dormitories, laboratories, recreation facilities, etc.) use indirect, semi-instantaneous hot water heaters such as Cemline. Provide double wall plate and frame heat exchangers. Storage tank to be cement-lined steel with stainless steel threaded connections. Domestic hot water heater shall be fed with 180 degree F boiler water. Heaters to provide 100 degrees F domestic hot water. Provide a mixing valve assembly to insure tempered water no greater than 110 degrees F is supplied to prevent scalding. Tank to be insulated with minimum 2 inch fiberglass insulation and 18 gauge epoxy painted steel jacket.
End of Division 22 PLUMBING
Facilities Services Department Revised 2013
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