This section includes the construction of water mains and appurtenances
and shall include performing all operations in connection with the
installation of all pipe, fittings, adapters, gate valves, valve boxes,
hydrants, connections to existing and new piping, thrust blocks, plastic
and concrete encasement, service connections, bedding, trenching,
backfilling, accessories, appurtenances, and miscellaneous work, and
the testing and disinfection of the entire new system. All water main
pipes, fittings, and valves shall be U.S. made.
The quality of all materials, manufacturing procedures, and
the finished pipe shall be subject to inspection and approval of the
Engineer. Such inspection may be made at the place of manufacture
and/or at the work site after delivery, and the pipe shall be subject
to rejection at any time on account of failure to meet any of the
specification requirements even though sample pipes may have been
accepted as satisfactory at the place of manufacture.
A. Ductile iron pipe (DIP).
(1) All ductile iron pipe shall be centrifugally cast pipe conforming
to the American National Standard for Ductile Iron Pipe, Centrifugally
Cast in Metal Molds or Sand-Lined Molds for Water or Other Liquids,
ANSI/AWWA Designation A21.51/C-151, latest revision. Pipe sizes shall
be as shown on the contract drawings with a thickness class of 52,
unless otherwise indicated on the plans. All pipe fittings shall have
joints with body thickness and radii of curvature conforming to ANSI/AWWA
Designation A21.10/C-110, latest edition.
(2) Joints shall employ a single, elongated gasket of such size and shape
as to provide an adequate compressive force against the spigot and
socket after assembly to effect a positive seal under all combinations
of joint and gasket tolerances. Joints shall be U.S. Pipe and Foundry
Company's "Tyton" joint, Griffin Pipe Products Company's
"Super Bell-Tite" joint, or approved equal conforming to American
National Standard for Rubber Gasket Joints for Cast Iron and Ductile
Iron Pressure Pipe and Fittings, ANSI/AWWA Designation A21. 11/C.111,
latest edition. Gaskets shall be vulcanized natural or vulcanized
synthetic rubber, resistant to common ingredients of sewage, industrial
wastes, including oils and groundwater. Gaskets shall be free of porous
areas, foreign material, and visible defects. Joint lubricants shall
be suitable for lubricating the joint assembly. Parts shall be nontoxic,
shall not support the growth of bacteria and shall have no deteriorating
effects on the gasket material.
(3) All ductile iron pipe shall be externally coated with a uniform thickness
(approximately one millimeter thick) of hot-applied coal tar coating.
The finished coating shall be neither brittle when cold, nor sticky
when exposed to the sun, and shall be strongly adherent to the pipe.
The pipe interior shall have cement mortar lining and bituminous sealed
coating in accordance with the latest ANSI/AWWA Designation A21.4/C-104
for Cement-Mortar Lining for Cast Iron and Ductile Iron Pipe and Fittings
for Water.
(4) In areas where the contract drawings call for restrained joints,
joints shall be ductile iron mechanical joints utilizing MegaLug retainer
glands, as manufactured by EBAA Iron. Field lok gaskets, as manufactured
by U.S. Pipe, or approved equal, may be utilized to restrain joints
on mechanical joint piping runs where approved by the Engineer. All
gate valves and fittings shall be restrained utilizing MegaLug retainer
glands. The assembly of all piping and fittings shall be inspected
prior to backfill.
(5) In areas where the mechanical joint set screw retainer glands are
required, joints shall be ductile iron mechanical joints utilizing
MegaLug retainer glands. Mechanical joint restraint shall be incorporated
into the design of the follower gland. The restraining mechanism shall
consist of individually actuated wedges that increase their resistance
to pull-out as pressure or external forces increase. The device shall
be capable of full mechanical joint deflection during assembly and
the flexibility of the joint shall be maintained after burial. The
joint restraint ring and its wedging components shall be made of grade
60-42-10 ductile iron conforming to ASTM A536-84. The wedges shall
be ductile iron heat treated to a minimum hardness of 370 BHN. Dimensions
of the gland shall be such that it can be used with the standardized
mechanical joint bell conforming to ANSI/AWWA C111/A21.11 and ANSI/AWWA
C153/A21.53 of the latest revision.
(6) Torque limiting twist-off nuts shall be used to insure proper actuation
of the restraining wedges. They shall have rated working pressures
of 350 psi in sizes sixteen-inch and smaller and 250 psi in sizes
eighteen-inch through forty-eight-inch. The devices shall be listed
by Underwriters Laboratories up through the twenty-four-inch size
and approved by Factory Mutual up through the twelve-inch size. The
restraint shall be the Series 1100 MEGALUG® restraint as produced
by EBBAA Iron, Inc. or approved equal.
(7) Additional restraint will be provided if thrust conditions are created
due to horizontal and/or vertical adjustment to the pipeline due to
field conditions. The length of restraint stall be determined by the
Engineer and is dependent upon the depth, test pressure, and type
of fitting. A minimum of three full lengths of pipe stall be restrained
before and after every fitting. Mechanical joints shall conform with
AWWA C111, latest revision thereof.
(8) The use of field lok gaskets, as manufactured by US-Pipe, may be
used in straight runs of push-on joint pipe where restraint is required.
The use of field lok gaskets shall be approved by the Engineer prior
to installation. Field lok gaskets must be visually inspected by the
Township prior to the pipes being put together
B. Compression - sleeve coupling.
(1) Couplings shall be designed to couple plain end piping by compression
of a ring gasket at each end of the adjoining pipe sections. The coupling
shall consist of one middle ring flared or beveled at each end to
provide a gasket seat; two follower rings; two resilient tapered rubber
gaskets; and bolts and nuts to draw the follower rings toward each
other to compress the gaskets. The middle and the follower rings shall
be true circular sections free from irregularities, flat spots, and
surface defects, and the design shall be such as to provide for confinement
and compression of the gaskets. For cast gray and ductile iron piping
the middle ring shall be of cast iron or steel and the follower rings
shall be of malleable iron.
(2) Cast iron shall conform to ASTM A48 and shall be not less than Class
25. Malleable iron shall conform to ASTM A47. Gaskets shall be designed
for long life and resistance to set after installation and shall meet
the applicable requirements specified for gaskets for mechanical joint
in ANSI A21.11 (AWWA C111). Bolts shall be track-head type; bolts
and nuts shall conform to the tensile requirements of ASTM A307, Grade
A; or bolts shall be round head square neck type conforming to ANSI
B18.5 with hex nuts conforming to ANSI/B18.2.2. Bolts shall be 5/8
inch in diameter; minimum number of bolts for each coupling shall
be as recommended by the manufacturer.
(3) Bolt holes in follower rings shall be of a shape to hold fast the
necks of the bolts used. Sleeve type mechanical coupling shall not
be used as an optional method of joining except where pipeline is
adequately anchored to resist tension pull across the joint.
C. Cast/ductile iron fittings.
(1) Ductile iron fittings shall be cement lined, mechanical joint, meeting the American National Standard for Ductile Iron Compact Fittings for Water Service, ANSI/AWWA C153 latest revision. Mechanical joints shall conform with latest revision for ANSI/AWWA C111/A21.11 Rubber Gasket Joints for Ductile Iron and Gray Iron Pressure Pipe and Fittings. Hydrant tees shall be mechanical joint tees. Cement lining shall conform to ANSI/AWWA C104, latest revision Cement Mortar Lining for Ductile Iron Pipe and Fittings for Water and shall include a bituminous seal coat. The exterior surface of fittings shall receive a standard foundry coal tar dip coating, product to meet with EPA approval. Fittings up to and including twenty-four-inch size shall be 350 psi pressure rating and fittings over twenty-four-inch shall be ductile iron with a pressure rating class of 250 psi. All mechanical joint fittings shall be supplied with ductile MegaLug retainer glands conforming with the applicable requirements in §
296-39A, including pipe restraint.
(2) Solid sleeve mechanical joint couplings shall be used where joining
pipes of the same outside diameter and material. Pipe couplings shall
be Tyler/Union Ductile Iron C-110 Full Body Mechanical Joint fitting
or C-152 Compact Ductile Iron fitting or approved equal and shall
be utilized where joining pipes of different outside diameters. Pipe
couplings shall consist of steel middle ring, two steel follower rings,
resilient gaskets and bolts. Single panel repair clamps are not suitable
alternates.
(3) Standard body fittings conforming to the latest revision of ANSI/AWWA
C110, Ductile Iron and Gray Iron Fittings, three-inch through forty-eight-inch
for water and other liquids may be used where approved by the Engineer.
(4) All fittings shall be U.S. made. Substitutions will be reviewed for
conformance with all pertinent specifications at the contractor's
expense.
D. Gate valves.
(1) Gate valves shall be iron body, inside screw, fully bronze-mounted,
conforming with the applicable requirements of AWWA Standard for Resilient
Seated Gate Valves, for Water Service of the American Water Works
Association (AWWA C509, latest revision). Valve interior and exterior
shall be coated with a 10 mil thickness epoxy coating which meets
or exceeds all applicable requirements of AWWA C550 and is certified
to ANSI/NSF 61. Disc shall be symmetrical iron wedge, fully encapsulated
with molded rubber, no exposed iron.
(2) Valves in sizes three-inch to twelve-inch shall be suitable for water
working pressures to 250 psi and test pressures to 500 psi.
(3) The operating nut shall be square, measuring 1 - 15/16 inch at the
top, two-inch at the base and shall be 1 3/4-inch high. An arrow
showing the direction of opening and the word "OPEN" shall be cast
on the flange of the operating nut. Valves shall open counter-clockwise.
(4) Valves in sizes three-inch to twelve-inch shall be vertical and shall
be provided with mechanical joint ends and MegaLug retainer glands.
(5) MegaLug retainer glands shall be ductile iron, Underwriters Laboratory approved and conform with the applicable requirements in §
296-39A, as manufactured by EBAA Iron, Inc., or approved equal.
(6) Lubrication instructions and parts lists shall be furnished in triplicate
for each type and manufacture.
(7) Valves shall be Resilient Wedge Gate Valves Model A-2360 as manufactured
by the Mueller Company.
(8) Each buried valve shall be provided with a Tyler/Union Series 6855
Part # 564-A cast iron, two piece, slide type valve box. Valve boxes
shall be 5-1/4-inch shaft with a round base and shall be provided
with extra deep cast iron covers with the word "WATER" cast on.
(9) Length of valve boxes and size of base shall be to suit each particular
installation and shall have about eight inches of adjustment up and
down available after setting to grade.
(10)
Valve boxes shall be as manufactured by Tyler/Union or approved
equal.
(11)
All valves and valve boxes shall be U.S.A. made. Substitutions
will be reviewed for conformance with all pertinent specifications
at the contractor's expense.
E. Fire hydrants.
(1) Hydrants shall be of 5 1/4-inch size, conforming to the standards
of the American Water Works Association, AWWA Standard for Dry-Barrel
Fire Hydrants for Ordinary Water Works Service, AWWA C502, latest
revision, relating to fire hydrants.
(2) Hydrants shall be of a two-piece design with a breakaway flange located
at the ground line. Hydrants shall be provided with a six-inch diameter
mechanical joint connection with MegaLug restraint and shall be set
with the breakaway flange as shown on the contract drawings. Extensions,
as required, shall be furnished and installed by the contractor.
(3) Hydrants shall be of the safety flange type with six-inch mechanical
joint connection, 5 1/4-inch main valve opening, 2 1/2-inch
hose connections with National Standard threads and one 4 1/2-inch
steamer nozzle to fit the owner's standard dye. Hydrants shall
have O-ring seals and the main valve shall close clockwise. All hydrants
shall be painted with two coats of red paint.
(4) All parts of hydrants shall be interchangeable with similar parts
of hydrants of the same size and type. All bolt holes shall be accurately
drilled from templates. All joints shall be faced smooth, so as to
make a perfectly watertight joint.
(5) Hydrants shall be provided with O-ring seals. Each hydrant shall
be shop tested under 300 psi applied above and below the compression
valve. Any hydrant showing sweating of metal or leaking or other defect
shall be rejected. All tests shall be made at the expense of the supplier.
(6) Hydrants shall be "Centurian Model A-423" as manufactured by the
Mueller Company.
F. Tapping/inserting sleeves and valves.
(1) Tapping/inserting sleeves shall be extra heavy pattern of the sizes
suitable for use on the pipe on which the respective sleeve is to
be installed and for use with the tapping/inserting valves. They shall
be designed for a working pressure of 250 psi and of the same manufacturer
as the tapping/inserting valves. Cast iron sleeves shall be as manufactured
by Mueller Company or an approved equal.
(2) Tapping/inserting valves shall be of the same manufacturer as the
tapping sleeves and meet all requirements for "gate valves" previously
specified.
G. Plastic pipe encasement. Plastic pipe encasement for use with ductile
iron pipe shall be polyethylene eight mil. thick either in tube or
sheet form with two-inch wide polyethylene adhesive tape used to secure
the film to the pipe.
H. Concrete pipe encasement.
(1) Concrete encasement work shall include the construction of nonreinforced
structures used for encasement or plugging purposes, as indicated
on the construction plans, and as directed by the Engineer.
(2) Concrete shall have a minimum twenty-eight-day compressive strength
of 2,500 pounds per square inch. All materials shall conform to the
applicable provisions of the latest edition of the American Concrete
Institute Standards (ACI Standard 318, Building Code Requirements
for Reinforced Concrete).
I. Concrete thrust blocks. Concrete for thrust blocks shall be Class
"C" concrete conforming to the NJDOT's Standard Specifications
for Road and Bridge Construction, as currently amended.
J. Broken stone. Unless otherwise approved by the Engineer, clean broken
stone shall be installed as bedding for all valves and hydrants. Clean
broken stone shall be nominal 3/4-inch size conforming to the requirements
in the NJDOT's Specifications for Road and Bridge Construction.
K. Steel pipe (bridge crossing). All welded steel pipe shall conform
to the requirements of AWWA Standard for Fabricated Electrically Welded
pipe, C-201 latest edition. Fittings, flanges, and similar parts shall
conform to the latest requirements of applicable AWWA Standards. Minimum
pipe thickness shall be 3/8 of an inch. Field welding shall conform
to the requirements of AWWA Standard for Field Welding of Steel Water
Pipe Joints, C-206, latest edition.
L. Service connections.
(1) The copper tubing shall be 3/4-inch or larger Type K and conform
with ASTM Designation B-88, latest revision.
(2) Curb valves and boxes shall be provided on all service connections
at the right-of-way line. Curb valves shall be bronze body, stem and
key with resilient O-rings. Curb valves shall be rated for a 250 psi
working pressure and shall be Mueller No. B-25209 Ball Valves without
drains. Valve boxes shall be cast iron extension type with one-inch
inside diameter upper section, stationary rod extensions and arch
pattern base for fitting over the curb valve. For service lines larger
than one-inch the contractor shall install a Tyler/Union Series 6855
part # 564-A main line valve box. The top of the valve box shall be
set flush with finish grade. Valve boxes shall not be installed in
sidewalk or curb areas. Valve boxes shall be Model # H-10314 as manufactured
by the Mueller Company, with Model 88033 stainless steel rod.
(3) Corporations shall be bronze body, key and stem with resilient O-ring
seals conforming with AWWA C800-84, latest revision Underground Service
Line Valves and Fittings. Corporations shall have threaded inlets
and compression fitting outlets suitable for use with Type K copper
tubing. Corporations shall be Model B-25008 as manufactured by the
Mueller Company or approved equal.
(4) Sizes of corporation stops shall be as required to reconnect existing
service connections from the existing water mains to the proposed
mains.
(5) Multiple taps at a single location shall be at least 18 inches apart
and staggered as far as angle to the spring line on water main to
avoid pipe damage (to prevent weakening pipe).