Portland Oregon Fire Hydrant Specifications, 2002
Source:   Portland Water Bureau


506   FIRE HYDRANTS

506.2   DRY BARREL FIRE HYDRANTS

2.1.A   GENERAL
  1. Fire hydrants shall be new and unused, 150 psi (1034 kPa) working pressure, 300 psi (2064 kPa) test pressure, and shall conform to AWWA C502 "Standard for Dry Barrel Fire Hydrants," except where these specifications take exception. Certificate of compliance to AWWA C502-85 is required.
  2. Internal parts to be removed without removing nozzle section.
  3. No part of hydrant shall be attached by lead or be made of lead in concentration above 20%.
2.1.B   NOZZLES
  1. Hose and Pumper Outlet Nozzles - Two 2-1/2-inch (64 mm) hose outlet nozzles and one 4-1/2-inch (115 mm) pumper outlet nozzle. Hydrant caps will have inside gaskets.
  2. Nozzles shall be lug or screw type and shall be brass. Leaded nozzles will not be accepted.
  3. Outlet Nozzle Threads - Conform with NFPA No. 194 for National Standard Fire Hose Coupling Screw Threads.
2.1.C   OPERATING VALVE
  1. Size of Hydrant - Minimum 5-inch diameter main operating valve opening.
  2. Furnish two or more bronze bushed drain valves.
  3. Drain valve shall close within six turns, at start of opening hydrant.
  4. Direction of Operation - Open by turning to the left or counter clockwise direction.
  5. Main valve seat ring and seat ring bushings shall be bronze. Removal of main valve assembly including seat ring shall be by a tool that engages the stem either at the breakaway stem coupling or the upper stem section.
2.1.D   CONNECTION
  1. Inlet Connection - 6-inch mechanical joint, accessories NOT required.
2.1.E   STANDPIPE
  1. Cast as one piece, screwed flanges, or mechanical joint retaining ring, flanged extensions may be used for different bury lengths. Flanges shall be cast integral on extension barrel, or screwed flanges.
  2. Standpipe Extension Kits - Shall be 6 inch, 12 inch, or 18 inch of breakaway design.
2.1.F   TOP CASTING
  1. Cast on top of hydrant an arrow and the word "OPEN" in relief indicating the direction of turning to open the hydrant.
2.1.G   PAINT
  1. Barrel painted orange to the bury line, OSHA Standard Safety Color OA-36 or equal.
  2. Nozzle caps painted black, Federal Color Standard 595, #17038 or equal.
  3. Pumper caps painted red, OSHA Standard Safety Color OA-41 or equal.
  4. Dome or top painted Orange, OSHA Standard Safety Color OA-36 or equal
  5. All paints shall be lead free.
2.1.H   BREAKAWAY SECTION
  1. Furnish traffic model hydrants with breakaway bolts, flanges or lugs. Design shall also include a breakaway stem coupling. Aluminum couplings are not acceptable. Fire hydrant head section shall have either 4, 6, or 8 bolts at the connection of the standpipe.
2.1.I   NOZZLE CAPS
  1. Operating and Nozzle Cap Nuts - Pentagon shape, 1-1/4-inches from point to opposite flat at base of nut and 1-3/16-inches (30 mm) from point to opposite flat at top of nut with a tolerance of 1/64-inch for each dimension from flat to opposite point.
  2. Nozzle Cap Chains or Cable are not to be included.
2.1.J   SEALS
  1. O-ring stem and valve seals throughout.
2.1.K   SHIPPING
  1. Hydrants shall be palletized in such a way that there is no contact made between hydrants or other objects.
2.1.L   THRUST COLLAR
  1. Operating nut thrust collar and threaded stem drive shall be one piece bronze. Oil filter plug or grease fitting shall be furnished in bonnet to lubricate thrust collar and stem drive. Lubricant reservoir shall be a permanently sealed reservoir. Furnish a positive stop to prevent over travel of the stem.
2.1.M   APPROVED MANUFACTURER
  1. Mueller Centurian model A-423
  2. American Darling B62B
  3. M&H Style 929
  4. Clow Medallion 2500
  5. Kennedy Guardian K81D
  6. AVK 27-80
  7. U.S. Pipe Metropolitan 250 and M94



Portland Oregon Fire Hydrants