If they come to your door offering a "free water test" just ask them what they're selling and how much it will cost. They'll come back the next day with a shady salesperson who will waste two hours of your time, assume control of your home, and then tell you it will be only $6700 for a water softener, all while insulting you, your home, your water, your soap, and using EXTREMELY high pressure sales tactics. Once you say no, expect more insults and general fit-throwing. This company is a sham.