UV systems, filters, reverse osmosis units, water conditioners etc. need to be maintained as per manufacturer’s guidelines. We’ve had a few calls from new residents who were told by “a friend” that as long as the green LED indicator was lit, the UV disinfection lamp was still good. That is true, only if the UV lamp has been changed yearly, and the quartz sleeve removed, inspected and cleaned. No matter the brand, UV lamps need to be replaced every 9000 hours (i.e. a year) as lamp life intensity drops continuously after that time to the point of offering little or no germicidal radiation.
Check on your filters and change as needed. (Typical households need to change filters 2 – 6 times per year.)