The Metropolitan 250 fire hydrant was produced by the U.S. Pipe Company between 1981 and 1999. It was available with main valve openings of 4-1/2” and 5-1/4”, with 2-way or 3-way nozzle configurations, and has the following features:
- 250 psi working pressure
- Ductile iron operating nut with a weather-shield
- Bronze hold down nut enclosed by a weather shield skirt and locked to bonnet
- Tamper-resistant bonnet locking screw
- Ductile iron bonnet securely fastened to the standpipe upper with an interlocking "breech lock"
- Delrin® anti-friction bearing to assure easy operation
- Grease chamber for all-temperature grease
- Nozzles are threaded-in, o-ring sealed, and secured with nozzle locks
- “Protectop" ground line coupling assures reliable fracture and quick repair after traffic impact
- Ductile iron standpipe lower
- Bronze seat ring
- Standpipe lower and elbow assembled with Tyton joint gasket
Identifying markings include: non-tapered standpipe upper for the 4-1/2” main valve style; tapered standpipe upper for the 5-1/4” main valve style; fluted bonnet; and smooth standpipe upper.