Inflow protection device for air relief valves on water-carrying pipelines
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United States of America Patent
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Jul 15, 2014
Grant Date -
Jan 30, 2014
app pub date -
Jul 27, 2012
filing date -
Jul 27, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
An inflow protection device for preventing liquids and other contaminants from entering a water-carrying pipeline through an air valve connected to the pipeline. The inflow protection device includes an adaptor and an elongated vent pipe. The adaptor has a first end for coupling with an outlet of the air valve and second end. The vent pipe has a first end configured for directly or indirectly coupling with the second end of the adaptor and a second end extending out of and above a vault in which the air valve is installed. The vent pipe is of a length sufficient to position its second end above a flood plain level so that the second end allows air to be exhausted from and admitted into the air valve even when the vault in which the air valve is located becomes flooded.
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