(A) Description. These specifications are to be used in conjunction with the latest AWWA Standard C502 for fire hydrants for ordinary water works service.
(B) Materials.
(1) All materials used in the production of fire hydrants for ordinary service shall conform to the specifications designated for each material listed in AWWA Standard C502.
(2) For reasons of standardization, the hydrants shall be five and one-quarter inch Waterous Pacer, Model WB-67-250 and of a pattern approved by the Director of Public Works. The name or mark of the manufacturer and the size of the valve opening shall be plainly cast in raised letters and so placed on the hydrant barrel as to be visible after the hydrant has been installed.
(3) As a minimum requirement, all hydrants shall be designed for a working pressure of 250 pounds per square inch and in workmanship, design, and material shall conform to the AWWA Standard C502. The hydrant bodies shall be ductile iron, fully mounted with approved non-corrodible metals. All wearing surfaces shall be either bronze or some other approved non-corrodible material, and there shall be no moving bearing or contact surfaces of iron in contact with iron or steel. All contact surfaces shall be finished or machined in the best workmanlike manner and all wearing surfaces shall be easily renewable.
(4) The design of the hydrant shall be such that all working parts may be removed without excavating through the top of the hydrant and shall have the required AWWA specified number of turns of the stem to open the gate an area equal to the area of the valve opening. Any change in area of the water passage through the valve must have an easy curve, and all outlets must have round corners of good radius. The nozzle section shall be designed for easy 360 degree rotation by the loosening of no more than four bolts.
(5) The main valve closure shall be of the compression type, opening against the pressure and closing with the pressure.
(6) Lugs, if required for harnessing the hydrant to the connecting pipe from the main in the street, shall be provided on the bell of the elbow or on the hydrant casting. A drawing of the lug construction shall be submitted for approval on request of the Village Engineer or Director of Public Works.
(7) Hydrants shall be provided with a sidewalk flange. Breaking devices shall be at the sidewalk flange which will allow the hydrant barrel to separate at this point with a minimum breakage of hydrant parts in case of damage. There shall also be provided at this point a safety stem coupling on the operating stem that will shear at the time of impact. Unless otherwise specified, all hydrants shall be equipped with O-Ring stem seals.
(C) Hydrant details.
(1) The dimensions and details of hydrant and nozzles, unless otherwise noted, shall be as follows:
Hydrant 6-inch Connection
Hydrant connection pipe size inside diameter 6"
Standpipe, minimum inside diameter 7"
Length of hydrant from bottom of hydrant near
connection to sidewalk ring 5' 8" minimum
Valve opening, minimum seat diameter 5-1/4"
Size of auxiliary gate valve 6"
Hose nozzles, number and size Two 2-1/2" and One 4-1/2"
The threading geometries of the hose nozzles shall match existing hydrants in the village.
(2) All nozzles shall be fitted with ductile iron threaded caps with the operating nut of the same design and proportions as the hydrant stem nut. Caps shall be threaded to fit the corresponding nozzles and shall be fitted with suitable gaskets for positive water tightness under test pressures.
(3) The operating nuts on hydrant stem and nozzle caps shall be the same for all sizes of hydrants. Dimensions shall be as follows:
Pattern of Nut Tapered Pentagonal
Height 1-1/16 inch
Size of Pentagon 1-3/8 inch at bottom of nut; 1-1/4 inch at top of nut (measured
from point to flat)
(4) The hydrants shall be furnished with flanged or mechanical joint end connections.
(5) The hydrant valves shall open by turning to the left (counter-clockwise).
(D) Factory hydrostatic test. Before the hydrant is painted at the factory, it shall be subjected to an internal hydrostatic test of 500 pounds per square inch with the hydrant valve in a closed position and again with the hydrant valve in an open position.
(E) Painting.
(1) All iron parts of the hydrant both inside and outside shall be thoroughly cleaned and painted. All inside surfaces and outside surfaces below the ground line shall be covered with two coats of asphalt varnish. The first coat shall have dried thoroughly before the second is applied.
(2) The outside of the hydrant above the finished ground line shall be thoroughly cleaned and thereafter painted with one coat of paint of a durable composition, and one additional coat of gloss red paint. This last coat shall be field applied after installation and immediately before final acceptance of the water system improvements.
(F) Construction details. Hydrants shall be plumb and shall be set so that the lowest hose connections are at least 18 inches above the surrounding finished grade. All hydrants shall be inspected in the field upon delivery to the job to insure proper operation before installation. A minimum of one cubic yard of coarse stone, gravel or like porous material shall be placed at and around the base of the hydrant to ensure proper drainage of the hydrant after use. The blocking of the hydrant shall consist of a wedge of 3000 psi minimum P.C. concrete of not less than one-half cubic yard of volume extending from the hydrant to undisturbed soil and shall be so placed to form a barrier adjacent to the hydrant base to counteract the pressure of water exerted thereon. Care shall be taken to insure that weep holes are not covered by concrete. The hydrant shall be set on a concrete block to insure a firm bearing for the hydrant base. The hydrant valve and tee shall be interconnected by steel rods if required by special provision. The resetting of existing hydrants and moving and reconnection of existing hydrants shall be handled in a manner similar to a new installation. The hydrant setting shall follow the East Dundee Standards.
(Ord. 07-57, passed 12-17-2007)