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Method and apparatus for water surge protection and protection of fire hydrant systems

  • US 5,218,987 A
  • Filed: 03/31/1992
  • Issued: 06/15/1993
  • Est. Priority Date: 03/31/1992
  • Status: Expired due to Term
First Claim
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1. A method for protecting an existing underground water distribution system from water surge damage, said underground water distribution system comprising an underground supply pipe, an underground shut-off valve assembly connected to said supply pipe, and an underground hydrant valve assembly connected to said shut-off valve, said method comprising the steps of:

  • A. excavating an area between said hydrant valve assembly and said shut-off valve assembly;

    B. tapping an area of the water flow to provide a branch opening located between the shut-off valve of the shut-off valve assembly and the hydrant valve of the hydrant valve assembly;

    C. connecting to said branch opening a fluid reservoir of a predetermined volume for receiving an increase in water volume during water surges and being at least partially filled with compressible gas; and

    D. covering with soil the excavated area including covering a substantial portion of the fluid reservoir with soil.

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