Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 27, 2008
Patent Application Number
11343288
Date Filed
January 30, 2006
Patent Primary Examiner
Patent abstract
A drain valve having a temperature responsive member that holds the drain valve in a water conserving mode when water is above freezing yet allows the drain valve to drain when the water is near freezing to prevent freeze damage to the irrigation system.
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