Review on 💧 Optimized Pure Blue 3-Stage 1:1 Reverse Osmosis Three-Pack Replacement Filters by Michelle Cooper

The strangest thing. Costco sells a blueh2o 3-stage water filtration system, but they sell the wrong one on their website (4-stage model). Thank god for Revane. See manufacturer's website, Level 1 and 3 are changed every 6 and 12 months respectively. Stage 2 filters are sold separately as they are replaced every 24-36 months depending on the water type. Very easy to swap out, but I recommend TURNING OFF the little handle that cuts into the water pipe.