22 10 00 PLUMBING PIPING AND PUMPS

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Last updated: Aug 01, 2017

22 11 00 FACILITY WATER DISTRIBUTION

.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.

22 12 00 FACILITY POTABLE-WATER STORAGE TANKS

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

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