A reasonable rule of thumb is every six months. However - use your pressure gauge to tell when the filters are plugged, and also keep in mind the chlorine capacity of your carbon block. Some are rated at 2000 gallons, some at 10 times that amount.j.stagner said:Yeah, that is a good point. Come to think of it, I've never changed my sediment or carbon, since my first RO/DI unit broke and I simply purchased a new one which is only a few months old.
What kind of schedule (roughly) should be used when determining when to replace them?
Sorry but you guys must have some fantastic water up in Seattle area.UnresistibleBlu said:Remember not to use the TDS meter as an indicator of when to replace your sediment and carbon cartridges. Use it as an indicator for your RO membrane and DI resin only.