Welcome to legacy.opp.psu.edu. With the exception of the Design & Construction Standards, all other content has been migrated to a new website platform. Please navigate to opp.psu.edu for the most up-to-date content.


Division 22

22 00 00 PLUMBING

22 00 01 Owner General Requirements and Design Intent

.01 Utilities (Refer to Division 33)
.02 Mechanical Rooms
  1. Comply with Space Planning for Engineered Building System requirements in Introduction.
  2. Coordinate and comply with other applicable mechanical room requirements as described in 23 00 01.06.
.03 Janitor Rooms
  1. Coordinate and comply with all applicable Janitor room requirements as described in 23 00 01.06.
.04 Laboratory Equipment
  1. Where laboratory equipment is shown on the general construction drawings, this equipment shall also be shown on the plumbing drawings.  The equipment shall bear the same identification numbers on all sets of drawings.
  2. The same equipment schedule shall appear on the architectural, and plumbing drawings.  This schedule shall give the equipment identification number, equipment description, services required, and the Contractor who is to furnish and install this equipment.


Coordinate and comply with all applicable Operation and Maintenance requirements as described in 23 01 00.


22 05 01 Plumbing General Requirements

.01 Painting
  1. See Division 9.
.02 Access Panels
  1. Access panels are required in each situation where items requiring maintenance are located above a concealed ceiling.
  2. Use screwdriver actuated locks.
  3. Access panel sizes shall be suitable for application.
  4. Access panel locations shall be indicated on contract drawings.
  5. Access panels are not required in lay-in ceilings, but identify appropriate tile with color button, cleated through, located on the adjacent ceiling grid.  Use color code of principal service.
.03 Piping
  1. Piping shall be pitched and valves installed to facilitate complete drainage of the system.
  2. All piping run within the building shall be run concealed in the finished portions of building in pipe spaces, ceilings or furred chases and exposed only in mechanical rooms and where shown on the drawings.
  3. No pipe shall pass in front of or interfere with any openings, door or window.  Head room in front of openings and doors shall in no case be less than the top of the opening.
  4. Piping shall not pass exposed through electrical rooms or be erected over any switchboard or other electrical gear.
  5. Pipe sizes shall be indicated on the plans at each change in direction and at all branch take off locations.
  6. Provide 2-inch clearance between insulated piping and other obstructions.
  7. Unions:
    1. No union shall be placed in a location which will be inaccessible.
    2. Unions shall be installed adjacent to all equipment for repair and replacement.
  8. Electrolysis Control:
    1. Electrolysis control between dissimilar materials shall be achieved through the use of dielectric nipples and a non-dielectric union.  Dielectric unions shall be avoided whenever possible.
  9. Sleeves:
    1. All pipes passing through wall or floor construction shall be fitted with sleeves.  Each sleeve shall extend through its respective floor, wall or partition and shall be cut flush with each surface unless otherwise specified.  Sleeves shall be two pipe sizes larger than the pipe when un-insulated and of sufficient size to allow for the insulation without binding.  Floor sleeves in mechanical rooms shall extend 4 inches above finished floor, all other spaces minimum one inch above finished floor.
    2. Sleeves in bearing walls, masonry walls, masonry partitions, and floors shall be standard weight steel pipe finished with smooth edges.  For other than masonry partitions, through suspended ceilings and for concealed vertical piping, sleeves shall be No. 22 USG galvanized steel.
    3. Where pipes pass through waterproofed floor or walls, design of sleeves shall be such that waterproofing can be flashed into and around the sleeves.
    4. Sleeves through exterior walls below grade shall have the space between pipes and sleeves caulked watertight.
    5. Install one-piece chrome-plated escutcheon plates with set screw at sleeves for all pipes exposed in finished areas.
    6. The annular space between sleeves and pipe shall be filled with fiberglass insulation and caulked in non-fire rated situations.
    7. Where pipes pass through fire-rated floors, walls, or partitions, the use of a UL approved system for through penetrations is required.  The annular space around the pipes shall be packed with mineral wool or other noncombustible material and sealed at each exposed edge to maintain the rating of the system in accordance with the through penetration sealant manufacturer's recommendations.
  10. System and Equipment Drains:
    1. All piping shall be arranged to completely drain the system.  Drain locations shall be located at all system low points.
    2. Where sectionalizing valves are installed, a drain shall be installed on downstream side of valve to drain that section of the system.
    3. All cooling tower drains and overflow are to be piped to sanitary system (not onto roof).
    4. All system and equipment drains are to be piped to a floor drain.
  11. Welding:
    1. All welding shall be done in accordance with the AWS.
    2. All boiler, pressure vessel, and gas piping welding must be done by certified welders as required by applicable codes.
    3. All welding must be done with portable welding machines.
  12. Pressure Tests:
    1. All piping must be tested prior to receiving insulation.
    2. Test pressures shall be minimum 1 1/2 times system operating pressure or as specified by the Professional.
    3. Pressure tests must be witnessed and acknowledged in writing by a University representative.
.04 Pipe Specialties (Refer to Division 23)
.05 Piping Systems Disinfection
  1. Before being placed into service, all new water lines, except those used exclusively as fire lines, shall be disinfected in accordance with AWWA standards.  Final connections to existing water lines shall not be made until this procedure is completed satisfactorily.
  2. The University shall be notified at least two weeks in advance of the date and time that the disinfection is to begin.  The University shall witness the process.
.06 Piping Systems Testing
  1. Hydrostatic Testing
    1. All piping must be tested prior to receiving insulation.
    2. Prior to filling the systems, all joints and potential leak sources shall be painted with a water-power blue line caulk mixture and allowed to dry.
    3. During the test each joint shall be visually inspected.
    4. Test pressures shall be specified by the Professional.
    5. The University shall be notified at least two weeks in advance of the date and time that the hydrostatic testing is to begin.  The University shall witness the testing.
.08 Pressure Gages and Thermometers
  1. Gages for general use shall be "Quality" type as manufactured by Marsh Instrument Company or equal.  Gages shall have a 4 1/2 inch diameter dial.  In main mechanical room, HVAC Contractor shall provide 6" diameter gages for all steam pressures and pumped condensate pressure.  The Plumbing Contractor shall provide similar gages for water and air.  Gages shall be calibrated for static head.  All gages shall be equipped with shutoff valves and snubbers.
  2. Siphons shall be used with all steam gages.  Also, all gages shall have gage cocks or valves suitable for the pressure involved.
  3. Thermometers for general use shall be stem type with an adjustable bracket.  Thermometers shall be organic liquid filled (red) in lieu of mercury filled.
  4. The scale on gages and thermometers shall be read to twice the operating pressure or temperature.  The Professional shall specify gage and thermometer ranges.
.09 Valves
  1. General
    1. All valves on any one project shall be the product of one manufacturer.
    2. Valves shall be right handed.  Balancing valves shall be a type that can be used for shut-off without disturbing balancing point setting.
    3. Where possible, valves shall be installed with valve bonnet in an upright position to prevent deterioration or corrosion of bonnet and packing.
    4. Valve body materials shall be compatible with piping system materials.
    5. In all applications, use ball valves for shut-off purposes and globe valves for throttling purposes in the bypass line.
    6. Gate valves may be used for shut-off purposes in large line sizes.
    7. Ball valves equipped with “characterizing discs” may be used for throttling purposes in lieu of globe valves.
  2. Pump Valves
    1. All constant speed circulating pumps shall included a separate shut off valve, balancing valve, and check valve.  Triple duty valves are not allowed.
    2. Triple duty valves or balancing valves shall not be used on pumps equipped with variable speed drives.
  3. Shutoff Valves
    1. Isolation shutoff valves shall be installed at each piece of equipment, terminal unit, and each branch takeoff to facilitate shutdown for repair.  Positive shutoff balancing valves with memory may satisfy this requirement at terminal units.
  4. Balancing Valves
    1. Balancing valves shall be installed in all 3-way control valve bypass lines and at all flow meters.
    2. Gate valves shall be limited to shutoff service only.  Gate valves shall not be used in a throttling application.  Globe valves or ball valves shall be used. 
  5. Check Valves
    1. Where check valves are required, check valves shall be installed on the equipment side of all shutoff valves to facilitate servicing the check valve.
  6. Drain Valves
    1. Drain valves shall be a minimum of 3/4" with hose end connection.
.10 Pipe Hangers And Supports
  1. Provide an adequate pipe suspension system in accordance with the current version of the International Mechanical Code, recognized engineering practices, using standard, commercially accepted pipe hangers and accessories.  The use of pipe hooks, chains, or perforated iron for pipe supports will not be accepted.
  2. Contractor shall submit Data sheets for approval on all pipe hanger items prior to installation.
  3. All piping shall be arranged to maintain the required pitch and provided for proper expansion and contraction.
  4. No holes are to be drilled or burned in structural building steel for hanger rod supports.
  5. Vertical runs of pipe shall be supported with riser clamps made specifically for pipe or for tubing.
  6. Where concentrated loads of valves and fittings occur, closer spacing may be necessary.  Hangers must be installed not more than 12 inches from each change in direction of pipes.
  7. All hangers for piping shall be provided with a means of vertical adjustment.  If adjustment is not incorporated in the hangers, use turnbuckles.
  8. Provide piping suspension systems with vibration isolation capability as required.  For vibration isolation requirements of piping suspension systems, refer to Sound and Vibration Control below.
  9. Copper clamps and hangers shall be used on copper piping.
.11 Sound and Vibration Control
  1. Coordinate and comply with all applicable requirements as described in section 23 05 01.04 Sound and Vibration Control.
.12 Mechanical Identification
  1. Coordinate and comply with all applicable requirements as described in section 23 05 01.05 Mechanical Identification.


.01 Insulation
  1. Fire Hazard Ratings
    1. All insulation shall have composite (insulation jacket and adhesive used to adhere the jacket to the insulation) Fire and Smoke Hazard ratings as tested under procedure ASTM E-84, NFPA 225 and UL 723 not exceeding:
      1. Flame Spread            25
      2. Smoke Developed     50
    2. Accessories such as adhesives, mastics, cements, and cloth for fittings shall have the same component ratings as listed above
    3. Paper laminate jackets shall be permanently fire and smoke resistant.  Chemicals used for treating paper in jacket laminates shall not be water soluble and shall be unaffected by water and humidity.  The only exceptions to the above are flexible foamed plastic insulation.
  2. General
    1. All pipe insulation shall be continuous through walls, partitions, ceiling openings and sleeves where fire and smoke ratings permit such penetration.
    2. Where pipes pass through fire-rated floors, walls, or partitions, the use of a UL approved system for through penetrations is required.  The annular space around the pipes shall be packed with mineral wool or other noncombustible material and sealed at each exposed edge to maintain the rating of the system in accordance with the through penetration sealant manufacturer's recommendations.
    3. Insulation on all cold surfaces must be applied with a continuous, unbroken vapor seal.  Hangers, supports, anchors, etc., that are secured directly to cold surfaces must be adequately insulated and vapor sealed to prevent condensation.
    4. Edges of vapor barrier insulation at valve stems, instrument wells, unions and other raw edges must be adequately sealed to prevent moisture from penetrating the insulation.
  3. Insulation Protection Shields:
    1. Insulation protection shields fabricated from galvanized steel shall be installed at all pipe hangers and supports.  Shields shall span an arc of 180°.
    2. Provide shield lengths and thicknesses as outlined in the latest version of the International Mechanical Code or MSS-SP69.
    3. Rigid cellular glass insulation, capable of resisting the crushing effect of the hydraulically loaded piping, shall be placed under each shield.  Jacketing material shall be wrapped around rigid insulation and adjacent top and butt sections to maintain the jacketing continuity.
    4. An 18 gauge stainless steel shield shall be installed on insulated piping located on the roof.  The shield shall be a minimum length of 36 inches and field located to prevent damage to the insulation while walking over the piping.
  4. Pipe Insulation
    1. Insulation systems shall conform to requirements in ASHRAE Standard 90.1-1999.
    2. In general, refrigerant piping systems shall be insulated with elastomeric pipe insulation.
    3. In general, all other piping systems shall be insulated with fiberglass piping insulation with an all-service jacket.  Fittings, flanges, and valves shall be insulated with fiberglass inserts and premolded polyvinyl jackets.
    4. Special insulation protection shall be considered for areas subject to abuse, moisture, etc. (i.e. outside, wash down areas).
  5. Equipment Insulation
    1. In general, equipment shall be insulated with elastomeric or mineral fiber insulation.  All equipment handling a medium below ambient temperature shall be additionally provided with a sealed vapor barrier.
    2. The following equipment must be insulated to the fullest extent possible.  Removable “Hot Cap” insulation must be provided for those items that will require insulation removal for periodic maintenance or inspection.  This includes many of the items listed below.
      1. Steam
        1. Valves, strainers, pressure reducing valves, pressure relief valves, traps, and condensate receivers/pumps, flash tanks, heat exchangers
      2. Hot water
        1. Valves, strainers, pumps, expansion tanks, air eliminators, storage tanks.
      3. Chilled water
        1. Pumps, valves, heat exchangers.



.01 Plumbing Piping
  1. Soil, Waste and Vent Piping
    1. The University prefers neoprene vent roof flashings with stainless steel clamps.
    2. Cast Iron
      1. Cast iron soil pipe and fittings above grade shall be service weight (SV) No-Hub.  Pipe and fittings shall conform to ASTM A-888.  No-Hub couplings shall conform to ASTM C 1277.
      2. Cast iron soil pipe and fittings below grade shall be extra heavy weight Hub and Spigot.  Pipe and fittings shall conform to ASTM A-74.  Neoprene gaskets shall conform to ASTM C 564.
      3. Cast iron soil pipe shall be supported every five (5) feet and at every joint.  Hangers shall also be installed at branch locations and where lines change directions.  Stacks and risers shall be supported at the base by concrete piers and by riser clamps at floor level.
      4. Any Soil piping installed below a building’s floor slab shall be cast iron.
      5. All drain piping downstream of equipment having the potential to discharge hot steam condensate to drain in the event of a malfunction must be cast iron.
    3. PVC or CPVC
      1. Piping shall have fused joints and DWV fittings.
    4. Acid Waste Lines - Underfloor/Underground to First Manhole
      1. Acid-resistant underground waste and vent lines shall be cast iron hub and spigot alloyed with approximately 14 percent silicon and shall conform to ASTM D651-48.  Piping shall be Durion or equal.
      2. Joints in acid-resisting pipe shall be made with caulking lead conforming to ASTM B-29.
      3. The need for acid neutralizing sumps will be determined by code requirements.  The University prefers not to use them, piping the acid waste directly from the building to the nearest sanitary manhole.
    5. Acid Waste Lines Within the Building
      1. Acid waste lines shall be Schedule 40, flame retardant, polypropylene with mechanical joints similar to Enfield Lab-Line.
  2. Water Piping
    1. General
      1. The installation of copper tubing for hot and cold water distribution systems shall conform to the requirements of the ICC International Plumbing Code.
      2. All fittings in contact with drinking water shall be listed by a third party agency to NSF 61.
      3. The installing contractor shall examine the copper tubing and fittings for defects, sand holes or cracks.  There shall be no defects of the tubing or fittings.  Any damaged tubing or fittings shall be rejected.
      4. Copper tubing shall be cut with a wheeled tubing cutter or approved copper tubing cutting tool.  The tubing shall be cut squre to permit proper joining with the fittings.
      5. Remove scale, slag, dirt and debris from inside and outside of tuping and fittings before assembly.  The tubing end shall be wiped clean and dry.  The burrs on the tubing shall be reamed with a deburring or reaming tool.
      6. Install piping free of sags, bends and kinks.
      7. Change in Direction:  Install fittings for changes in direction and branch connections.
      8. Install piping to permit valve servicing.
      9. When installing piping adjacent to equipment and machines, allow space for service and maintenance.
      10. Install unions in copper tubing at final connection to each piece of equiopment, machine, and specialty.
    2. Copper Tubing
      1. Copper water tubing shall be ASTM B 88, Type L hard drawn.
      2. Joints shall be made with no lead solder or the copper press-joint fittings.
    3. Solder Joints:
      1. Solder Filler Metals:  ASTM B 32, lead-free alloys.
      2. Flux:  ASTM B 813, water flushable
      3. Solder joints shall be made in accordance with ASTM B 828.
      4. The temperature of the joint during soldering shall not be raised above the maximum temperature limitation of the flux.
    4. Copper Press-Joint Fittings:
      1. Press-Joint Fittings:  Copper and copper alloy press fittings shall conform to material requirements of ASME B16.18 or ASME B 16.22 and performance criteria of IAPMO PS 117.  Sealing elements for press fittings shall be EPDM.  Fittings shall be designed such that sealing elements stays properly in its groove and does not roll out when inserting tube.  Sealing elements shall be factory installed or an alternative supplied by fitting manufacturer.  Press ends shall have a feature that assures leakage of liquids and/or gases from inside the system past the sealing element of an unpressed connection.  The function of this feature is to provide the installer quick and easy identification of connections which have not been pressed prior to putting the system into operation.
      2. Press connections:  Copper and copper alloy press connections shall be made in accordance with the manufacturer's installation instructions.  The tubing shall be fully inserted into the fitting and the tubing marked at the shoulder of the fitting.  The fitting alignment shall be checked against the mark on the tubing to assure the tubing is fully engaged (inserted) in the fitting.  Copper press fittings shall be installed using the proper tools, actuator, jaws and rings as instructed and approved by the press fitting manufacturer.
      3. Installer shall be a qualified installer, licensed within the jurisdiction, and familiar with the installation of copper press joint systems.
      4. Follow all installation instructions of manufacturer of press-joint fitting to ensure quality, leak-tight seal.  To prevent distortion of the pipe, be sure to stringently maintain the minimum distance between fittings depending on tubing diameter as directed by manufacturer.  Failure to provide this distance may result in an improper seal, and installer shall be held liable for all associated costs of required repairs.
      5. The installing contractor shall insure that sealing elements are properly in place and free from damage.  For Sizes 2-1/2" to 4", installer should insure that the stainless steel grip ring is in place.
      6. Provide unions and arrangement of sufficient length of removable sections of tubing at valves and equipment connections to allow for easy removal and reinstallation for repairs without having to redo press connections.
    5. The use of cross-linked polyethylene (PEX) tubing is not allowed for domestic water piping.
    6. The use of Copper Push-on-Joint Fittings is not allowed for domestic water piping.
.02 Plumbing Specialties
  1. Valves
    1. A gate valve, angle valve, or compression stop shall be placed immediately below each plumbing fixture on each hot and cold supply so that service can be readily shut off for maintenance.
    2. All branch lines in the water supply piping shall be fitted with ball valves.  Ball valves shall also be used for sectionalizing the water distribution system.
    3. Ball valves must be equipped with valve stem extensions long enough to allow the handle to easily clear the pipe insulation that will be installed over the valve.
    4. All valves shall open with a counterclockwise motion.
    5. All exposed valves in finished areas shall be plated.
  2. Water Hammer Arresters
    1. Water hammer arresters shall be installed on cold water piping to toilet rooms where flush valves are used.  The arresters shall be the hydro-pneumatic type and shall be sized properly to control the water hammer.
    2. Any quick-acting automatic valves supplying equipment shall also have water hammer arrestors installed.
  3. Gages
    1. Provide pressure gages on each side of water meters, water filters, and PRV's.
  4. Backflow Preventers
    1. Acceptable manufacturer: Conbraco (no substitutions)
.04 Pumps
  1. Constant Pressure Pumps
    1. Where constant pressure pumps are required on the potable water system, they shall be installed in duplicate and be similar to Peerless Pumps' VFD (Variable Frequency Drive) Pumping System.
  2. All pumps shall have bronze impellers.


.01 Storage Tanks
  1. All pressurized tanks shall be ASME stamped.
  2. Provide access manholes for inspection.


.01 Domestic Water Heaters
  1. Sizing
    1. Caution should be exercised in sizing electric hot water generators located at the Commonwealth Campuses.  The general trend has been for designers to oversize these units.
    2. The University prefers to use design criteria obtained from the Werden-Spielvogel report prepared for the Edison Electric Institute Commercial Building Water Heating Research Project (EEI Project RP61).
  2. Hot Water Generators
    1. The shell of the generator shall be designed for a working pressure of 150 psig and shall bear the ASME code for Unfired Pressure Vessels and shall meet the Commonwealth of Pennsylvania, Department of Labor and Industry regulations.
    2. All heating coils of hot water generators installed at the University Park Campus shall be constructed of cupronickel alloy containing 10 percent nickel.
    3. Hot water generators shall be a tank type, similar to Patterson Kelley Compact 400 Series.  The unit shall be complete with ASME rated pressure and temperature relief valves, inlet and outlet thermometers, pressure gauges upstream and downstream of the control valve, bronze body circulating pump, condensate strainer, float and thermostatic trap, control valve, vacuum breaker, steam line strainer and all auxiliaries necessary to compose a complete working unit.  Where campus compressed air is available, the steam control valve shall be air-loaded (if air is available).
    4. Instantaneous hot water generators shall not be used unless approved in advance by the University.  When approved, instantaneous hot water generators shall contain a cupronickel coil (10 percent nickel) and all the auxiliaries required for the above type generator with the exception of the circulating pump.  The steam control valve on instantaneous hot water generators shall be air-loaded (if air is available) or steam actuated.  Self-contained valves are not accepted.  Instantaneous hot water generators shall be similar to Leslie Constantemp or Aerco.


.01 Water Conditioners
  1. The need for water softening shall be determined on an individual project basis and approved by OPP Engineering Services.
  2. At University Park Campus, water softening by ion exchange technologies shall be prohibited.  Water treatment for the removal of hardness shall be performed with other technologies, such as reverse osmosis. 


.01  Water Filtration Devices
  1. The need for water filtration shall be determined on an individual project basis.
  2. Units shall be similar to Kumo.


.01 Plumbing Fixtures
  1. Floor Drains
    1. Floor drains in mechanical rooms, laundries, promenades, terraces, and similar locations shall have perforated sediment bucket with integral auxiliary drainage rim so designed that grate cannot be set in place until bucket is in position.
    2. Sterilizers and autoclaves shall have a fixed air gap between the equipment and the sewer.
    3. Every floor drain shall be equipped with a ProSet trap guard to prevent the trap from drying out and to prevent sewer gas from entering the occupied space.
    4. Floor drains located above the ground floor shall be equipped with clamping collars and shall be flashed with 24" x 24", 6-lb. sheet lead.
    5. A floor drain shall be provided to serve each emergency shower.  Drain shall be located directly below shower head.  Floor shall slope toward drain.
  2. Water Closets
    1. Toilets shall be wall hung, vitreous china, elongated bowl, siphon jet action, 1 1/2 inches top spud similar to American Standard Afwall.
    2. Toilet seats shall be open front, no cover, white with stainless steel check hinge similar to Church.
    3. Closet fittings and carrier shall be similar to Josam's Unitron series.
    4. Flush valves shall be Sloan or Zurn water saver type.  Shall not exceed 1.6 gal./flush.
    5. Water closets in women's restrooms shall be equipped with dual-flush flushometers.
  3. Urinals
    1. Urinals shall be high efficiency wall hung, vitreous china, washout with 3.4-inch top spud and 2-inch outlet.  Urinals shall be similar to Zurn #Z5798 “The Pint”.
    2. Carriers shall be complete with fixture bolts, bearing plate, adjustable extension, steel pipe uprights, cantilever foot bases and chrome plated trim.  Carriers shall be similar to Josam Unitron series.
    3. Flush valves shall be sensor operated, hard wired, and consume no more than 1/8 gallon per flush.  Acceptable manufacturers:.Sloan,Zurn, or Toto.
    4. The use of waterless urinals is required in stadiums and arenas.  The use of waterless urinals is prohibited elsewhere.
  4. Lavatories
    1. Lavatory carriers shall be of the institutional type with support plate, bearing plate steel uprights and block bases for supporting lavatory fixture with concealed hangers.  Carriers shall be similar to Josam C-356.
    2. Lavatory supply and waste lines should enter the wall to allow for easier cleaning and better sanitation.
    3. Provide at least one hose bibb on the hot and cold water supply under one lavatory in each restroom.
    4. Lavatory faucets shall be of the self closing type with the closing time of operation adjustable up to fifteen (15) seconds.  They shall contain interchangeable operating units and shall be of one (1) manufacturer.  Units shall close with the pressure of the water.  All units shall be vandal-proof and all operating parts in contact with water shall be Monel metal, including a stamped Monel metal seat.
    5. Faucet shall be Chicago faucet No. 406 (or No. 747 if a pop-up waste is specified with faucet), center-set lavatory fitting.  Equivalent units, as manufactured by Moehn Faucet Division, Cole Valve Company, or American Standard, are acceptable.
  5. Showers
    1. Single Showers
      1. Shower heads shall be self-cleaning and of the vandal-proof type solidly attached to shower stall.  Use water saver type.
      2. Shower controls shall be Powers Series 420, thermostatically controlled, with chrome plated metal levers.
      3. Showers shall have Dole flow controls, limiting water flow to two (2) gallons per minute, installed between the mixing valve and the shower head.
    2. Gang Showers
      1. Shower heads and controls shall be the same as for single showers.
      2. Piping supplies shall be from below the floor.
      3. Units shall be manufactured by Bradley or equal.
  6. Antifreeze Hose Bibs
    1. Antifreeze hose bibs are needed adjacent to all building entrances for the purpose of washing down walks and entrances.
    2. Hose bibbs shall be key type.
  7. Service Sinks
    1. Service sinks shall be similar to Stonite Precast Terrazzo Mop Service Basins as manufactured by Stonite Products Company.  Service basins shall be 24 inches square with three (3) inch wide and twelve (12) inch high shoulders and shall be cast as a single unit of terrazzo.  The sides of the service basin installed against any wall shall be provided with stainless steel tiling flanges cast integral with the basin and extending two (2) inches above the shoulders.  On exposed side the service basin shall be provided with integral cast stainless steel caps extending over the top of the shoulder and extending at least 1 1/2 inches down the sides.  Provide three (3) inch drain connection with stainless steel strainer plates and traps.  Install counter-flashing as required.
    2. Service sink fitting shall be equal to Chicago faucet No. 897 with bucket hook, wall brace, 3/4 inch threaded hose connection, vacuum breaker, and integral stops.
  8. Roof Drains
    1. Roof drains shall be Josam or equal.
    2. Insulate drain body and all horizontal rain leaders.


.01 Drinking Water Cooling Systems
  1. Electric Water Coolers
    1. Electric water coolers shall be wall mounted, semi-recessed and shall be supported by carriers similar to Josam No. C-352.
    2. The coolers shall be equipped with a basin of 18-8 stainless steel, bubbler, water valve and pressure regulator, a sealed refrigeration system with air-cooled condenser.
    3. Front panel of unit shall be removable and unit shall be so constructed that the refrigeration unit can be removed without moving the cooler from the wall.
    4. No "hot water for coffee" type dispensers are permitted.
    5. In public areas the water cooler shall be accessible to the handicapped.
    6. Coolers containing lead solder joints, storage tanks, or other elements constructed of lead that can be in contact with the drinking water are not acceptable.



.01 Compressed Air Systems
  1. Air Compressors
    1. When after coolers are specified on air compressors, they shall be air cooled or shall be cooled with re-circulating process water.  Water cooling through equipment to drain is not permitted.


.01 Vacuum Systems
  1. Vacuum pumps shall be duplex type, similar to Nash Engineering Co.


.01 High Purity Water Systems
  1. The University prefers a central steam powered still for projects at University Park.
  2. Any requirement for a higher grade water will be handled at the point of use, being fed from the central still unit.
  3. On stills rated 5 gph and over, the steam powered heat exchanger shall be constructed of cupronickel, 10 percent nickel.  The manufacturer shall verify in writing that the heat exchanger is so constructed.
    1. We are picking up large amounts of copper deposits on the boiler tubes, so to eliminate this problem the University requests that no copper heat exchangers be installed.
  4. Condensing water to drain is not permitted.
  5. All parts of the still in contact with the steam vapor and distillate shall be tin or tin-coated copper.  The tin must be 99.97 percent pure and the coating thickness a minimum of 0.001 inch.  Specifications should be written around Barnstead.