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.
The most common feature of a water softener is a timer-based system that will soften water at a set time each day. Other systems are able to soften water as needed. Timer-based water softeners tend to cost less to run, saving homeowners about $100 per year.