748 WATER MAIN AND SERVICE BRANCH MATERIAL
748.00
Acceptance.
Follow the requirements listed in each 748 section.
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 a design approved by the owner of the utility and provides a
positive lock designed to prevent 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 mm) 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 three-piece 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 counter-clockwise.
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).