Chapter 13.05
WATER MAIN INSTALLATION
Sections:
13.05.010 Ductile iron pipe (DI).
13.05.020 Galvanized iron pipe (GI).
13.05.060 Cross connection control devices.
13.05.070 Town standards – Approval.
13.05.010 Ductile iron pipe (DI).
Ductile iron pipe shall conform to the requirements of AWWA C151 specifications. Pipe thickness shall be of Class 50, or greater if required in accordance with the criteria specified in AWWA C150.
Ductile iron pipe shall be cement lined and sealed in accordance with AWWA C104. In addition, all pipe shall have push-on rubber gasket joints and be furnished in 10- to 20-foot lengths unless design conditions dictate otherwise. [Ord. 349 § 1, 1994.]
13.05.020 Galvanized iron pipe (GI).
Galvanized iron pipe shall conform to the latest revision of ASTM A-120 or A53, Grade A, Schedule 40, seamless pipe. Pipe shall be hot-dip galvanized. Pipe fittings shall be galvanized and equipped with screwed fittings.
Cast iron screwed fittings shall be ASTM A-126 and A-153 which conforms to ANSI B 16, 4, 125 psi class. [Ord. 349 § 3, 1994.]
13.05.030 Copper pipe.
All copper service pipe shall be rated in accordance with ASTM Designation B88, Type K, soft copper tubing, and the National Sanitation Foundation Standards 61 Section 6 concerning joining and sealing. [Ord. 349 § 4, 1994.]
13.05.040 Fittings.
All fittings shall be of the size, type, and type of joint as specified on the plans by the designated utility or by the pipe manufacturer. [Ord. 349 § 5, 1994.]
13.05.050 Valves.
A. Gate Valves. Valves shall be manufactured and tested in accordance with AWWA C 500 specifications. They shall be equipped with mechanical joints or flange ends of Class 125 in accordance with ANSI B16-1.
Gate valves, three inches and larger, shall be iron body, bronze-mounted, double disc, and O-ring stem seal. Gate valves smaller than three inches shall be 125 psi, non-stem rising, wedge disc, all brass or bronze valves with screwed, soldered, or flanged ends compatible with the connecting pipe. All valves shall open counterclockwise and, unless otherwise specified, shall be nonrising stem type equipped with standard AWWA two-inch square stem operating nuts.
B. Butterfly Valves. Butterfly valves shall meet or exceed all AWWA C504 specifications and shall be Class 150-B with short body which are suitable for direct bury. When they are installed they shall have a position indicator which clearly shows position of the disc. All valves shall be equipped with an underground manual operator with AWWA two-inch square operating nut and shall open with a counterclockwise rotation.
C. Check Valves. Check valves, three inches or larger, shall be iron body, iron disc, bronze-mounted, swing type, clearway, quiet closing, level and spring valves flanged ends. All valves shall comply with AWWA C508 specifications.
Check valves, two and one-half inches or smaller, shall be bronze body, bronze mounted, swing type with flanged or threaded ends depending upon installation.
D. Air and Air Vacuum Relief Valves. Air and air vacuum relief valves shall have cast iron bodies and covers and stainless steel floats. Float guides, bushings, and lever pins shall be stainless steel or bronze. Valves shall be designed for operating service to 150 pounds per square inch (psi).
E. Pressure Reducing Valve. As required by hydraulic analysis of system.
F. Valve Boxes. All valve boxes shall be cast iron, two-piece, equipped with suitable extension for at least a 36-inch-trench depth. The top section and lid will be designed for installation in traffic areas. Lid is to be labeled “W” with lid tabs pointing in direction of the water main. [Ord. 349 § 6, 1994.]
13.05.060 Cross connection control devices.
All cross connection control devices will be specified by the water utility or county cross connection control program based on the degree of potential hazard. Such devices will comply with models approved by the DOH in accordance with WAC 248-54-285. [Ord. 349 § 7, 1994.]
13.05.070 Town standards – Approval.
All construction shall be done in accordance with the town of Yacolt’s standard water line details and drawing Nos. W1 and W2. All plans will be approved by town’s engineer. [Ord. 349 § 8, 1994.]