Backflow prevention in the chemical line
North Dakota Administrative Code
North Dakota Administrative Code
A spring loaded, chemically resistant check valve having a minimum opening pressure of ten pounds per square inch [69 kilopascals] must be located at the injection port of the irrigation system. History: Effective October 1, 1988. General Authority: NDCC 4.1-35-03 Law Implemented: NDCC 4.1-35-02, 4.1-35-03
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