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> Most contain both Most installed water filters are not reverse osmosis because it takes up too much room, wastes a bunch of water, needs to be remineralized,

> Most contain both Most installed water filters are not reverse osmosis because it takes up too much room, wastes a bunch of water, needs to be remineralized, is more expensive than a non-RO 3 stage filter, and is not significantly more effective than a 3 stage that includes carbon.

Mistletoe 4y ago
What are the stages in a 3 stage filter? Do they really even remove anything? Think about it- if they aren’t removing minerals they aren’t removing things like lead, arsenic, chromium… It’s like a glorified Brita filter and doesn’t even lower the ppm of the water that comes out of it.
- BugsJustFindMe 4y ago
  > What are the stages in a 3 stage filter? The first stage is some kind of sediment filter, either sand, ceramic, or polypropylene. The second and third stages are usually both activated carbon. > Do they really even remove anything? Yes. There are measurement standards for this. All of the major brands provide independent lab analysis data sheets. For instance: https://www.brondell.com/content/Coral_UC300_PDS_092821.pdf https://www.brondell.com/content/Coral_UC300_PDS_092821.pdf > It’s like a glorified Brita filter Brita also provides performance datasheets for their filters. https://www.brita.com/assets/23601607167498ba405a22f7692b3b86.pdf https://www.brita.com/assets/23601607167498ba405a22f7692b3b8... > Think about it... It sounds like you have not yet learned about the NSF/ANSI testing standards for water filtration. Today is your lucky day my friend: https://www.nsf.org/consumer-resources/articles/standards-water-treatment-systems https://www.nsf.org/consumer-resources/articles/standards-wa...