748 WATER MAIN AND SERVICE BRANCH MATERIAL
748.00
section.
Acceptance.
Follow the requirements listed in each 748
748.01 Ductile Iron Pipe, Joints, and Fittings. Furnish ductile iron
pipe conforming to ANSI/AWWA C151/A21.51 and to ANSI/AWWA
C150/A21.50 for thickness design. Furnish pipe with a cement mortar
lining conforming to ANSI/AWWA C104/A21.4. Furnish gaskets
conforming to ANSI/AWWA for each length of pipe and suitable for the
type of joint of the pipe. Ship gaskets in a separate container.
Furnish push-on joints, mechanical joints, and boltless restrained
joints conforming to ANSI/AWWA C111/A21.11. For restrained joints,
ensure that the restraint is an approved design that provides a positive
lock against joint separation. Steel locking segments molded into a
gasket to grip the pipe do not meet the requirements for this joint.
Ball and socket joints are suited for underwater installations. The
Contractor may use ball and socket joints for other types of installations
where an appreciable amount of joint deflection and a positive lock
against joint separation are required.
Manufacture fittings for ductile iron pipe according to ANSI/AWWA
C110/A21.10 or ANSI/AWWA C153/A21.53, and ANSI/AWWA
C111/A21.11. For fittings 16 inches (406 mm) or larger, use ductile iron
only. Ensure that fittings are cement mortar lined according to
ANSI/AWWA C104/A21.4.
Furnish materials according to the Department’s Qualified Products
List (QPL).
748.02 Polyvinyl Chloride (PVC) Pipe, Joints, and Fittings.
Furnish PVC pipe conforming to AWWA C 900, AWWA C 905,
AWWA C909, or ASTM D 2241. Furnish push-on type pipe joints
conforming to ASTM D 3139 with a thickened bell and with a rubber
gasket conforming to ASTM F 477.
Use PVC, PE, or PB pipe and couplings, and solvent cements made
from compounds that are tested and certified as suitable for potable water
distribution products by the National Sanitation Foundation (NSF)
Testing Laboratory or the Canadian Standards Association Testing
Laboratory, or any other similarly accredited testing agency acceptable to
the Laboratory. Do not use PVC, PE, or PB pipe and couplings, or
solvent cements containing any ingredient in an amount that has been
demonstrated to migrate into water in quantities considered to be toxic, as
tested according to Sections 3 and 4 of NSF Standard Number 14.
Furnish materials according to the Department’s Qualified Products
List (QPL).
748.03 Polyethylene (PE) Service Branches and Fittings. Furnish
PE service branches and fittings conforming to AWWA C901.Furnish
material with plain ends conforming to the potable waterline
requirements specified in 748.02.
Furnish materials according to the Department’s Qualified Products
List (QPL).
748.05 Copper Service Branches and Fittings. Furnish copper
service branches conforming to ASTM B 88 (ASTM B 88M), Type K.
Assemble branches using flare-type compression fittings conforming to
AWWA C800. Ensure a minimum working pressure for the branches of
150 pounds per square inch (1.0 MPa). Use either coil type (temper 060
annealed) or drawn type (temper H) material.
Furnish high-quality copper brass fittings with AWWA C800
dimensions.
Furnish materials according to the Department’s Qualified Products
List (QPL).
748.06
Steel Pipe Encasement.
Furnish steel casing pipe
conforming to ASTM A 139/A 139M, Grade B or ASTM A 53, Grade B,
that is galvanized on exterior and interior surfaces as specified in Section
711.02. Furnish the manufacturer’s certification. Steel casing pipe shall
have a minimum wall thickness as shown below:
Pipe Diameter
Wall Thickness
Wall Thickness
(in)
(mm)
Designation
(in)
(mm)
4 to 10
100 to 260
Standard
0.237 to 0.365 6.02 to 9.27
12 to 22
300 to 560
Standard
0.375
9.53
24 and larger 600 and larger Extra-strong
0.500
12.7
For steel casing pipe specified to be bored or jacked, provide
ungalvanized pipe with the largest wall thickness.
748.07 Polyethylene Encasement. Furnish 8-mil (200 m) thick
polyethylene encasement material conforming to ANSI/AWWA
C105/A21.5.
748.08 Gate Valve and Valve Box. Furnish ductile iron gate valves
conforming to AWWA C509 resilient seated.
Gate valves shall open counter-clockwise. Use valves suitable for
push-on and mechanical joints for ductile iron pipe and for push-on joints
for PVC pipe.
Furnish cast iron valve boxes consisting of adjustable two or threepiece with cover and with a base corresponding to the size of the valve.
Use heavy-duty type valve boxes for locations within existing or
proposed pavement, driveway, or other traveled areas. Ensure that valve
boxes are coated with an asphaltic coating by the manufacturer. The
cover shall have the word “WATER” cast in it.
Furnish materials according to the Department’s Qualified Products
List (QPL).
748.09 Inserting Valve and Valve Box. Furnish inserting valves that
operated like ordinary gate valves, with the same gate and seating
assembly as AWWA C509 gate valves. Furnish material that consist of a
two-piece sleeve for assembly around the main the valve, and a valve box
conforming to 748.08. Furnish the equipment necessary to drill the main
wall and insert the valve according to the manufacturer’s
recommendations.
Furnish materials according to the Department’s Qualified Products
List (QPL).
748.10 Cutting-in Sleeve, Valve, and Valve Box. Furnish cutting-in
valves with the same gate and seating assembly as AWWA C509 gate
valves. Furnish material that consists of a cutting-in sleeve and valve
suitable for assembling over the ends of a cutout length of existing pipe,
according to the manufacturer’s recommendations, and a valve box
conforming to 748.08. Furnish sleeves and valve joints of the
mechanical joint type.
Furnish materials according to the Department’s Qualified Products
List (QPL).
748.11 Tapping Sleeve, Valve, and Valve Box. Furnish tapping
valves with the same gate and seating assembly as AWWA C509 gate
valves. Furnish material that consists of a two-piece sleeve for assembly
around the main, the valve, and a valve box conforming to 748.08.
Furnish cast iron, epoxy-coated steel, or stainless steel tapping sleeves.
Furnish the equipment necessary to drill the main wall through the valve
according to the manufacturer’s recommendations.
Furnish materials according to the Department’s Qualified Products
List (QPL)
748.12 Tapping Saddle and Corporation Stop. Furnish iron,
bronze, brass, or, AWWA C223, stainless steel tapping saddles. Furnish
band type or double-strap type tapping saddles, with International Pipe
Standard (IPS) tapping or AWWA tapered thread inlet.
For use with saddles, provide bronze alloy corporation stops with IPS
inlet thread of AWWA tapered thread and with outlet thread compatible
with connecting pipe, without special adapters. For direct tapping,
provide bronze alloy corporation stops with AWWA tapered inlet thread
and with outlet thread compatible with connecting pipe, without special
adapters.
Furnish materials according to the Department’s Qualified Products
List (QPL).
748.13 Service Stop and Service Box. Furnish bronze service stops
with coupling threads conforming to AWWA C800. Use service stops
designed so that water pressure from the inlet side of the body provides
additional sealing action. Furnish service stops that open counterclockwise.
Use Buffalo type service boxes. Furnish covers that have the word
“WATER” cast in raised letters. Securely fasten covers with a bronze or
brass bolt.
Furnish materials according to the Department’s Qualified Products
List (QPL).
748.14 Meter, Setting, Stop, and Chamber. Furnish meter setting
yokes that allow the meter to be readily installed without disturbing
piping. Furnish angle pattern meter stops with lock wings for the street
side of the meter piping. Furnish check valves for the customer side of
the meter piping. Furnish chambers composed of concrete, vitrified clay,
PVC, or PE. Furnish double walled, tightly fitting lids.
748.15 Fire Hydrant. Furnish cast iron, dry-barrel post type fire
hydrants conforming to AWWA C502, with the following modifications:
Furnish hydrants incorporating an approved groundline breakable
flange and valve stem coupling.
Furnish compression type hydrants with the valve opening against the
pressure. Ensure that the valve end of the valve stem is designed to
eliminate contact of dissimilar metals. Ensure that the valve stem is at
least 1-inch (25 mm) diameter or 1-inch (25mm) square steel between the
hydrant operating nut and the valve, except for the valve stem coupling
located at the point corresponding to the breakable flange.
Furnish a main valve port that is at least 4 1/4-inch (108 mm)
diameter. Furnish a rubber faced valve.
Ensure that the hydrant is designed so the nozzles may be oriented to
point in any direction. Ensure that the hydrant connection to the pipe has
at least a 6 inches (150 mm) inside diameter. Furnish push-on or
mechanical type joints conforming to ANSI/AWWA C111/A21.11.
Ensure that the hydrant has one center-front pumper nozzle of 4-inch
(100 mm) internal diameter with male threads to match the fire apparatus
of the maintaining agency. Furnish two hose or streamer nozzles of 2
1/2-inch (63 mm) internal diameter with male threads to match apparatus
of the maintaining agency. Ensure that nozzle sections are designed to
lock into the hydrant body using locking lugs or threads. Furnish nozzles
with threaded cast iron caps having an integral nut of the same design as
the hydrant operating nut.
Contact the maintaining agency to determine the desired color and
number of coats of enamel for the hydrants.
Furnish materials according to the Department’s Qualified Products
List (QPL).