Section 62-04-08-04 - Softener rating1. Softener rating shall be based on grains of hardness removed (as calcium carbonate) between successive regenerations and must be related to the pounds of salt required for each regeneration. 2. The number of cubic feet, the type of ion exchanger (such as greensand, carbonaceous, siliceous gel, resin), the amount of salt required for each regeneration shall be given for each softener, and manufacturer's specified backwash, rinse, and softening flow rates in gallons per minute shall be given for each softener of downflow design. The same information with the exception of manufacturer's specified backwash rate shall be given for water softeners of upflow design. 3. Grain capacity shall be validated by actual test runs as specified on at least one size of each model. Manufacturer's test results must be correlated and extended to other sizes of the same model. Manufacturer's certified test data to be supplied when required. General Authority: NDCC 43-18.1-03
Law Implemented: NDCC 43-18.1-04
N.D. Admin Code 62-04-08-04