Fire hydrants shall conform to AWWA specification C-502. Main valve shall be 5 1/4" inch compression type which closes with pressure. Fire hydrants shall be three-way in design, having two 2 ½ inch hose nozzles and one 4 1/2" inch pumper nozzle with nozzle caps and cap chains. All nozzles shall have National Standard Threads. Operating nut shall be pentagonal measuring 1 ½ inches from point to flat. Hydrant shall open by turning counter-clockwise into hydrant barrel utilizing a chloramines resistant O-ring seal. A suitable nozzle lock shall be in place to prevent inadvertent nozzle removal. Hydrant shoe shall have Integral Restraint Connection for 6 inch pipe. The interior of the shoe including the lower valve plate and stem cap nut shall have a protective coating that meets the requirements of AWWA C-550. Fire hydrants shall be red in color. Fire hydrants shall be rated for a working pressure of 250 Psig. Composition of the main valve shall be EPDM molded rubber having a durometer hardness of 95+/- 5 and shall be reversible in design to provide a spare in place. The grease or oil used for lubrication shall be nontoxic and safe for use in potable water systems. All hydrants will be of the traffic “breakaway” type with safety stem coupling and breakable flange that permits full 360 degree rotation of the nozzle section. Cut down bolts are not acceptable for this requirement. All below ground nuts and bolts shall be stainless steel for corrosion resistance. The hydrant shall be designed with an anti-friction bearing, located so that it reduces the torque required to operate the hydrant. Plastic (polyurethane) main valves are unacceptable. The main valve shall have a cross section not less than 1”. Hydrant shall be Mueller A-423 Super Centurion 250 or approved equal.
