Automatic water softener electronic BNT1650F valve 1", regeneration metered-time. Low consumption of water and salt per regeneration. Programming is simple and fast - Insertion the time. - Insertion day of week. - Time of regeneration. - Number of days between regenerations. - Hardness input. Hardness regulator output Is required output minimum hardness of around 15°F, but the most commonly used setting is not less than 5°F. Loosening action will reduce mixing with raw water outp