Method and apparatus for freeze prevention of irrigation systems

摘要

There is disclosed an apparatus for freeze prevention protecting an irrigation system. The response of the apparatus depends on environmental conditions. At a first temperature condition, the irrigation system is shut down. At a lower temperature condition, the system remains shut down and heat is delivered to the above ground portions of the system. In the event temperatures continue to decrease, a full drainage of the above ground portion of the irrigation system will be accomplished and alarm notification will be given.