Current through Bulletin 2024-06, March 15, 2024
(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 ANSIcertified as
meeting the requirements of ANSI/NSF Standard 61, Drinking Water System
Components - Health Effects. To permit fieldverification 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 any 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, blowoffs, 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 Stateadopted plumbing code.
(c) Meters Meter installation shall conform
to the State-adopted plumbing code and local jurisdictional
standards.