§ 74-175. Fire hydrants.

All fire hydrants purchased by or installed in the village shall meet the following specifications:

A423 Mueller Super Centurion 250 Hydrant 6'6" trench depth,

6″ MJ Shoe 7/8 ″ top × 1″ bottom square operating nut, open right;

4″ GANS Pumper Nozzle.

No alternates except as stated herein.

All hydrant parts and extensions must be original manufacturer parts.

The specifications stated above may be granted a variance provided their equivalent as determined by the following provisions:

(1)

Three-way type with two 2½-inch hose connections with National Standard Hose Coupling Thread and one four-inch Pumper Nozzle with National Standard Hose Coupling Thread. The centerline of all nozzles shall not be less than 18 inches above the groundline mark on the lower barrel.

(2)

Bury (trench) depth shall be six feet unless otherwise required by the plans or specifications.

(3)

Inlet connections shall be six-inch standard mechanical-joint conforming to AWWA Standard C111 and furnished with all joint materials.

(4)

Direction of opening shall be to the right (clockwise).

(5)

Operating nut and nozzle cap wrench nuts shall be seven-eighths of an inch square with a minimum height of one inch.

(6)

The main valve shall be a water compression type closing with the water pressure.

(7)

The minimum I.D. of the main valve seat ring shall be five inches, and friction losses through the hydrant shall not exceed 2.5 psi at a flow rate of 100 gpm, through the pumper connection when flow tested in accordance with paragraph 3.8, AWWA C502073, as certified by a certified friction loss curve from the manufacturer, applicable of the specific model to be furnished.

(8)

Bronze to bronze threading of the main valve seat ring to show assembly to ensure the easy removal of the stem and valve assembly with a short, light-weight wrench.

(9)

Fully automatic double drain valve system with two or more bronze-lined outlets in the shoe that are fed by two inlet holes in the bronze seat ring that are capable of draining the hydrant at a rate of five gpm when the hydrant is properly installed.

(10)

Integrally cast barrel and show flanges below the groundline with no threads or grooves cut into the barrel wall as a means of flange retention. Flanges, barrel and shoe castings below the groundline shall be constructed of gray iron or ductile iron, but in no combinations thereof so as to ensure uniform strength of these components.

(11)

Traffic "breakway" design that permits a full 360 degrees facing of nozzles by infinite degree. The safety flange shall not utilize breakable bolts but fail at a groove cast inside the bolt circle upon vehicular impact. The safety stem coupling shall be designed so as to fail only in tension, but not to fail from excessive torque applied to the operation nut in either direction. The coupling shall be located below the flange to prevent a vehicle wheel from depressing the stem and opening the valve.

(12)

Main valve assembly and operation stem shall be removable through the top of the upper barrel without the need of removing the upper barrel or nozzle section.

(13)

Dry top design in which the threads and bearing surfaces of the operating mechanism are sealed from the waterway by two O-ring stem seals, and from the atmosphere by O-rings and a weather shield.

(14)

The operating mechanism shall incorporate an oil chamber and automatic lubrication system that circulates a low viscosity oil to all operating threads and bearing surfaces each time the hydrant is operated, effectively to - 30 degrees Fahrenheit. There shall be an externally accessible oil filler plug to permit checking or adding oil, if required, but so positioned as to prevent overfilling.

(15)

Hydrant Coating to be Sherwin Williams Kem Aqua 400 enamel primer - White Kem 400 Enamel top coat lead free Yellow, #14.

(16)

Contractors and/or suppliers shall furnish two copies of detailed shop drawings from the manufacturer of the specific hydrant model to be furnished if requested by the engineer. The drawings shall list applicable ASTW numbers of all components.

(17)

The use of hydrants other than specified in this section, or any deviation from these specifications will require the approval of the engineer not later than 24 hours prior to the bid date.

(Code 1974, § 21-84; Ord. No. 2012-10, § 1E., 5-15-2012)