Supermax (short for: super-maximum security) is the name used to describe control-unit prisons, or units within prisons, which represent the most secure levels of custody in the prison systems of certain countries.
Consumer Complaints and Reviews. Outrageously expensive for services not provided: $690 - the cost to purchase your own, high-quality softener and RO filtration plus 1 year of filters and salt. $5,770 - the cost of a 3-year contract with Culligan to rent their basic softener and RO filtration with service.
Some people have claimed to pay anywhere from $350-$700 for a Culligan water softener, and that is for the lowest priced models, which are not likely to be the ones recommended by the Culligan salesperson who visits your home.