R309-550-6. Component Materials and Design

  (1) ANSI/NSF Standard for Health Effects.

  All materials that may come in contact with drinking water, including pipes, gaskets, lubricants and O-Rings, shall be ANSI-certified as meeting the requirements of ANSI/NSF Standard 61, Drinking Water System Components - Health Effects. To permit field-verification of this certification, all components shall be appropriately stamped with the NSF logo.

  (2) Asbestos and Lead.

  (a) The use of asbestos cement pipe shall not be allowed.

  (b) Pipes and pipe fittings installed after January 4, 2014, shall be "lead free" in accordance with Section 1417 of the Federal Safe Drinking Water Act. They shall be certified as meeting ANSI/NSF 372 or Annex G of ANSI/NSF 61.

  (3) Standards for Mechanical Properties.

  Pipe, joints, fittings, valves, and fire hydrants shall conform to ANSI/NSF Standard 61, and applicable sections of AWWA Standards C104-A21.4-08 through C550-05 and C900-07 through C950-07.

  (4) Used Materials.

  Only materials that have been used previously for conveying drinking water may be reused. Used materials shall meet the above standards, be thoroughly cleaned, and be restored to their original condition.

  (5) Fire Hydrants.

  (a) Hydrant drains shall not be connected to, or located within, 10 feet of sanitary sewers. Where possible, hydrant drains shall not be located within 10 feet of storm drains.

  (b) Auxiliary valves shall be installed in all hydrant leads.

  (c) Hydrant drains shall be installed with a gravel packet or dry well unless the natural soils will provide adequate drainage.

  (6) Air Relief Valves and Blow-Offs.

  (a) At high points in water mains where air can accumulate, provisions shall be made to remove air by means of hydrants or air relief valves.

  (b) The open end of the air relief vent pipe from automatic valves shall be provided with a #14 mesh, non-corrodible screen and a downward elbow, and where possible, be extended to at least one foot above grade. Alternatively, the open end of the pipe may be extended to as little as one foot above the top of the pipe if the valve's chamber is not subject to flooding, or if it meets the requirements of (7) Chamber Drainage.

  (c) Blow-offs or air relief valves shall not be connected directly to a sewer.

  (d) Adequate number of hydrants or blow-offs shall be provided to allow periodic flushing and cleaning of water lines.

  (e) The air relief valve shall be installed in a manner to prevent it from freezing. A shut-off valve shall be provided to permit servicing of an air relief valve.

  (7) Chamber Drainage.

  (a) Chambers, pits, or manholes containing valves, blow-offs, meters, or other such appurtenances to a distribution system, shall not be connected directly to a storm drain or sanitary sewer.

  (b) Chambers shall be provided with a drain to daylight, if possible. Where this is not possible, underground gravel-filled absorption pits may be used if the site is not subject to flooding and conditions will assure adequate drainage. Sump pumps may also be considered if a drain to daylight or absorption pit is not feasible.

  (8) Control Valve Stations

  (a) Pressure Reducing Valves (PRVs)

  (i) Isolation Valves shall be installed on both sides of the pressure reducing valve.

  (ii) Where variable flow conditions will be encountered, consideration shall be given to providing parallel PRV lines to accomidate low and high flow conditions.

  (b) Backflow Devices

  Installation of Backflow devices shall conform to the State-adopted plumbing code.

  (c) Meters

  Meter installation shall conform to the State-adopted plumbing code and local jurisdictional standards.