§ 82-493. Water.

(a)

Pipe specifications. The following are minimum specifications for water pipes:

(1)

Ductile iron. Class 350 sizes three inches and above.

(2)

Polyvinyl chloride.

a.

Class 150 (AWWA C900) for pressures greater than 150 psi.

b.

SDR 21, for pressures less than 150 psi.

(3)

All fittings shall be ductile iron.

(b)

Valves. The following are minimum specifications for valves:

(1)

Gate valves 2½ inches and smaller shall be solid wedge, bronze type rated for 175 psi working pressure.

(2)

Three inches and larger AWWA C500 O-ring, working pressure of 200 psi.

(3)

Valves shall be city standard as manufactured by Mueller Company or M & H Valve and Fitting Company.

(c)

Valve boxes. Valve boxes shall be cast iron, heavy roadway type, two piece with drop covers.

(d)

Hydrants. Hydrants shall be per AWWA C-502. Hydrants shall be city standard as manufactured by Mueller Company, M & H Valve and Fitting Co. or American Darting with:

(1)

Two 2½-inch hose connections.

(2)

One 4½-inch pumper connection.

(3)

A four-foot depth cover of leader pipe.

(4)

A six-inch shoe connection.

(e)

Concrete blocking. The contractor shall furnish all materials and perform all labor as necessary for installing concrete blocking for fittings, including elbows, tees and other fittings as shown on the drawings and/or specified herein. Concrete blocking shall be formed and poured at the backs of fittings, including elbows, tees and other fittings as shown on the drawings and as directed by the engineer. Concrete mix shall be 1; 2½; 3 1/3 , and have a compressive strength of not less than 2,500 psi after 28 days. Blocking shall be poured against undisturbed earth.

(f)

Customer service connections. The following are minimum specifications for customer service connections:

(1)

Corporation stops. Corporation stops shall have standard corporation stop thread conforming to AWWA C800 on the inlet end, with compression pattern flared tube couplings for connections to goosenecks.

(2)

Goosenecks. Copper tubing for goosenecks shall conform to the applicable requirements to ASTM B88, type K, annealed.

(3)

Copper tubing. Copper tubing shall conform to ASTM B88, type K, annealed.

(4)

Service stops. Service stops shall be waterworks inverted-ground-key type, round flow way, tee handle, without drain. All parts shall be of bronze with compression-pattern flared tube couplings, and shall be designed for hydrostatic test pressure not less than 200 psi.

(5)

Water meters. Water meters shall be the displacement type conforming to AWWA C700 with bronze main case, high density synthetic polymer measuring chamber, reinforced hard rubber oscillating piston or disc polycarbonate plastic register box and cast iron or bronze bottom plate. Maximum operating pressure shall not be less than 150 psi. Meters shall be five-eighths-inch by three-fourths-inch or five-eighths-inch by one-half-inch.

(6)

Meter boxes. Meter boxes shall be of cast iron or plastic construction. The cover shall have the words "Water Meter" cast into the top.

(7)

Service connection. Each meter shall have its own tap and be placed in its own two-inch casing if the water line is to be placed under a road or driveway. The line must have a 200 psi or greater rating. The meter box must be set perpendicular to the road and level. The area must be landscaped and inspected by a city employee.

(g)

Testing. When a section of pipe of a length deemed adequate is ready for testing, the line shall be thoroughly blown free from air and a leakage test made. Wherever conditions will permit, pipelines shall be tested before the trench is backfilled. All joints shall be examined during open trench test and all leaks entirely stopped. A test pump and means for accurate measurement of water, introduced into a line during testing, shall be furnished. Corporation stops shall be furnished and installed, at all high points in the line (required for blowing lines free from air) and at the test pump location.

(1)

Temporary bulkheads. Furnish, install and remove all temporary bulkheads, flanges or plugs, to permit the required pressure tests. Furnish all equipment and labor to properly carry out such test and to replace defective material.

(2)

Test pressure and leakage. Test pressures shall be 200 psi. Leakage allowed during the test per 1,000 feet of pipe shall be:

Pipe diameter (in inches)	Gallons per hour
4	0.43
6	0.64
8	0.85
10	1.06

 

Minimum test period shall be two hours; however, if additional testing is required, such additional testing shall be performed.

(3)

Defective materials and workmanship. Any cracked or broken material, such as pipe. fittings, valves or hydrants shall be removed and replaced with sound pieces. Joints which leak shall be carefully remade. Remade joints and replaced material shall be retested under the same conditions of operation. If joints or materials are then found to be defective, they shall be remade and replaced until the line passes the required test.

(h)

Sterilization. All pipelines and all appurtenances including house service connections which have been exposed to contamination by reason of this construction shall be sterilized before being placed in service. Pipelines shall remain filled for a 24-hour period with a solution of water and HTH or chlorine in amounts equivalent to at least the following quantities for each 100 feet of pipe:

Pipe Diameter (in inches)	HTH (ounces)
6	2
6	3
10	4
12	6
16	10

 

(1)

Not less than one ounce of HTH shall be used, per 100 feet, for all mains, sizes two inches and smaller, the above quantities shall be increased if necessary to secure a chlorine residual of 50 parts per million after 24 hours. The developer shall obtain bacteriological analysis of samples of water taken from the distribution system which are satisfactory to the owner, before the lines will be accepted.

(2)

Furnish all HTH or liquid chlorine required for sterilization. Furnish all equipment and labor required for the work, and provide for the bacteriological test. All chlorinated water shall be disposed in accordance with the rules of the state environmental protection division.

(3)

Flushing. Upon completion of the sterilization, all mains and piping shall be thoroughly flushed before placing in service.

(i)

Installation of pipelines. Pipe shall be installed with a minimum of four-foot cover, ditch line shall be on a straight even grade with no peeks or valleys. Sufficient excavation shall be made for pipe bells. Ditch bottom shall be fine graded. Ditch in rocky areas shall be undercut and the pipe bedded in at least six inches of crushed stone, gradation #67. Selected backfill consisting of finely divided earth, sand, stone dust, or crushed stone shall be placed and tamped about and over the pipe (in six inch layers) up to a height of at least 12 inches above the top of the pipe barrel. Before replacing the remaining backfill on PVC pipe, detectable marking tape, imprinted with the words "Buried Water," as manufactured by Reef Industries, Inc., Alien Systems, Inc., or equal shall be placed in the ditch for the entire length of pipe line installed. Tape for pipe smaller than six inches shall be two inches in width, tape for pipe six inches and larger shall be six inches in width. General backfill material may be used to fill the remainder of the ditch except that no rock will be permitted to be mixed with backfill material. Backfill material shall be placed in six-inch layers with each layer thoroughly compacted with heavy-duty tampers. Wheel loading will not be permitted until the pipe has a minimum cover of 36 inches. All dead-end water lines shall require a flush assembly at the dead-end valve. (See attachment 82-493(i) 1-1).

(Code 1979, ch. 47, § II; Ord. of 4-7-2014(1) )

Editor's note

The above-referenced attachment 82-493(i) 1-1 is hereby adopted by reference as if fully set out herein and is available for review in the city offices during regular business hours.