Gradelok™

With Gradelok™: Patent number 4,741,356

With a life expectancy of, say 100 years or so, why not make certain your fire hydrants are installed correctly the first time. How many times, after installation, is a hydrant still either too high or too low??

Specifying Gradelok™ gives you the advantages of a restrained joint and grade adjustment in a single fitting. You’ll provide enhanced aesthetic appearance by having all fire hydrants set exactly to grade. And by specifying Gradelok™ you’ll save money by eliminating expensive extension kits and concrete thrust devices. Be sure to specify Gradelok™, the system providing the very best hydrant installation available.

Without Gradelok™:

Benefits of Having Gradelok™

• Reduced installation costs and taxpayer budget savings are an important consideration, however… Public utility directors, politicians and taxpayers should demand the specification of Gradelok™ for the public safety benefits!
• Fire Department wrenches – approximately 15” long need appropriate clearance from groundline to nozzle centerline of 18” to spin the caps off quickly in an emergency.
• At properly-installed nozzle centerline of 18”, ONE fireman can easily attach a suction hose by holding it between his knees while threading the coupling. Hydrants installed too high or low require at least TWO firefighters to hook up.
• The 18” distance is the most effective to enable a hydrant’s traffic feature to break properly upon impact. If the traffic flange is buried or set too high, chances of it breaking correctly upon impact are greatly reduced.
• The traffic flange is always exposed, easily-inspected for damage or leakage during routine maintenance.
• At a uniform installation height, firefighters can most-quickly identify hydrant locations in an emergency.
• Gradelok™ is manufactured of 350 Ductile Iron, cement-lined inside and tar-coated outside for corrosion protection, and conforms to AWWA C153/ANSI A21.53/AWWA C104/ANSI A21.4
  
  
• Click here to view promotional video. 56k Dialup
• Click here to download video in ZIP format to on your machine.