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 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 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
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).