I have an Autotrol 255 Valve with 440 clock timer. The product was purchased in 1999. I haven't added salt in a few years secondary to the unit not working (salt remaining same level). I did unplug the unit a few years ago and figured I would no longer use it (didn't really like the soft water anyways). I do remember in the past, when the unit was working I would see little crystals around the unit near the black hose drain. TODAY, I flushed the toilet and noticed those crystals (large amount) in my toilet and subsequently throughout my entire water system in the house. The crystal actually clogged all of my fawcets (pain in the a$$ cleaning them). I did go and turn the white valves to make sure I am totalling bypassing the unit (I hope I turned them correctly) *made sure the bypass valve was straight in alignment and the other 2 making a +. My fear is now drinking the water. Is it okay to drink? Any suggestions on maintenance? Has anyone had this issue before and are the crystals toxic? Any input would be appreciated.