U.S. Pipe Metropolitan/M94 Hydrant Suggested Specification


Fire hydrants shall conform to the requirements of AWWA C-502 Standard for Dry Barrel Fire Hydrants.  In addition
they shall be Underwriters Laboratories (UL) Listed and Factory Mutual Research Corporation (FM) approved.

Hydrants shall be rated for 250 psi operating pressure and 500 psi test pressure.  All iron parts shall be 
manufactured of ductile iron.  The only exception shall be parts designed to break on traffic impact.

The hydrant shall be equipped with two 2-1/2" hose nozzles and one 4-1/2" pumper nozzle.  The nozzles shall 
positionwith the hose nozzles 180 degrees apart.  The pumper nozzle shall be on the same plane as the hose 
nozzles.  The nozzle threads shall be National Standard Fire Hose Screw Thread as described in Appendix A of 
AWWA C502.  Thenozzle caps and operating nut will be a pentagon, 1-1/2" point to flat as measured at the bottom 
of the nut.  The nozzles shall be threaded into the upper barrel with reverse (counterclockwise) threads and locked in 
place with a mechanical device.

The hydrant shall be 5-1/4" valve opening (or 4-1/2" if specified), minimum and shall be of the compression type
closing with the pressure.  The seat ring shall be made of bronze and threaded into a bronze subseat.  All gaskets 
sealing the seat ring shall seal against a bronze surface.  The entire valve and rod assembly shall be removable
through the top of the hydrant with a small lightweight seat wrench.

The drain valve shall allow complete drainage of all residual water in the hydrant.  The circumferential drain passage
inside the hydrant shall be bronze.

All exterior fasteners below the groundline shall be stainless steel.

The hydrant will be of the traffic type.  A frangible barrel and rod coupling designed to break upon traffic impact will
prevent damage to the hydrant and connecting piping.  The hydrant will be capable of being rotated 360 degrees by
loosening two bolts on the barrel coupling.  Groundline devices utilizing lugs, keeper devices, frangible bolts, or 
breakaway barrels will not be accepted.

The operating nut shall be ductile iron and also serve as a weather shield.  The hydrant bonnet will have an arrow cast
on it showing the direction of opening.

All sealing surfaces shall be sealed with o-ring seals.  A travel stop device shall be installed in the bonnet to limit the
downward travel of the rod.  The lubrication chamber shall be filled with all weather grease.  An anti-friction
thermoplastic washer shall be provided to reduce the operating torque required to operate the hydrant.

Fire hydrants shall be painted red unless otherwise specified.  Hydrants shall be U.S. Pipe Metropolitan/M94.