Section 62-04-08-06 - Application of equipment1. Water analysis. A chemical analysis of the water supply, made according to accepted water analysis standards, shall be furnished with the recommendation for water conditioning equipment. For those waters containing a hardness of four hundred milligrams per liter [23 grains per gallon] and or sodium in excess of one hundred milligrams per liter (6 grains per gallon) of calcium carbonate. The compensate hardness to determine the increased amount of resin needed. 2. Capacity and sizing. To assure adequate softening capacity, the following formula may be used (based upon daily water needs per person of fifty gallons [189.27 liters]) to determine the required size of manual and semiautomatic softeners: G x P x H x F = Softening capacity requirements in grains of hardness.
Where "G" is fifty gallons (daily needs per person).
Where "P" is the number of persons to occupy dwelling.
Where "H" is the hardness of the water supply expressed in grains per gallon, and "F" is the desired frequency of regeneration in days.
Note: G = twenty-eight gallons if water closets are not supplied with softened water.
G = twenty gallons if only hot water is to be softened.
3. The following table supplies the ratio of occupancy to the number of bedrooms within the dwelling to be used with the formula supplied in subsection 2 in determining adequate size of equipment. | Number of bedrooms | 2 | 2 | 4 | 5 | 6 |
| Estimated number of occupants | 4 | 5 | 6 | 7 | 8 |
| Total Gallons G = 50 | 200 | 250 | 300 | 350 | 400 |
| Used Per G = 28 | 112 | 140 | 168 | 196 | 224 |
| Day G=20 | 80 | 100 | 120 | 140 | 160 |
| Minimum number of days between regeneration (subsection 4 of section 62-04-08-02) and automatic equipment (subsection 5 of section 62-04-08-02 | 1 | 1 | 1 | 1 | 1 |
| Minimum number of days between regeneration (subsection 1 of section 62-04-08-02) and manual and semiautomatic equipment (subsection 2 of section 62-04-08-02) | 7 | 7 | 7 | 7 | 7 |
a. Manual or semiautomatic water softeners having a softening capacity of less than eight hundred gallons [3028.33 liters] between each regeneration shall not be acceptable. b. Automatic regeneration (subsection 4 of section 62-04-08-02) and fully automatic regeneration equipment (subsection 5 of section 62-04-08-02) shall in no case be sized to require regeneration more than once in any twenty-four-hour period unless acceptable provision is made to deliver soft water during the regeneration process. 4. When the water softener is to be installed on a private water supply system, attention should be directed to the capacity of the pump and well and to the operating pressure of the water system to assure proper operations and regeneration of the softener. General Authority: NDCC 43-18.1-03
Law Implemented: NDCC 43-18.1-04
N.D. Admin Code 62-04-08-06