Retrofitting a fire hydrant with secondary valve

Details Retrofitting a fire hydrant with secondary valve Retrofitting a fire hydrant with secondary valve

2007-07-10

2007-07-10

Lee, Kevin (Department: 3753)

Fluid handling

Processes

Cleaning, repairing, or assembling

C137S299000

Reexamination Certificate

active

11367289

ABSTRACT:
The present invention relates to methods and devices for retrofitting fire hydrants with additional structure for reducing the potential that those with ill intent can foul municipal water supplies by introducing toxins or other materials into fire hydrants. Various embodiments include a seat and elongated member for efficient and cost effective installation and cooperation with valves, which close off portions of the hydrant otherwise available for receipt of toxic or other materials when the fire hydrant nozzle cap is unscrewed and open.

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