H-Series Fire Hydrant

H-Series Fire Hydrant

The H-Series fire hydrant was first manufactured by A.P. Smith Mfg. Co. from the 1930's until the 1970's. Hydrants were available with main valve openings of 4-5/8” (style H-100) and 5-1/4" (style H-105). Between 1964 and 1990, the H-Series hydrant was produced by the U.S. Pipe Company, which also included main valve openings of 4-5/8” (style H-200) and 5-1/4” (style H-205). H-Series hydrants have the following features:

  • 150 psi working pressure (a high pressure pilot valve can be added to obtain 250 psi working pressure)
  • Ground line traffic flange from 1930 to 1964, featuring breakable nuts and bolts
  • From 1964 to 1990, the H-200 and H-205 styles utilize a breakable overlapping safety flange and safety valve rod coupling
  • Rotating head (upper standpipe) to face nozzles in desired direction (styles H-200 and H-205)
  • Non-tapered upper standpipe                                                           
  • rings (e.g. ring gaskets) seal the bonnet and safety flange
  • Bonnet and standpipe upper fluted (A.P. Smith styles) and smooth (U.S. Pipe)

Identifying markings include: weather shield operating nut retained with vertically recessed socket head screw or cap screw; styles H-100 and H-105 have a conventional style safety flange whereas styles H-200 and H-205 have an overlapping skirt flange; individually chained caps.

For more information on A.P. Smith hydrants, click here.

Maintenance Manual