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Guide · home water filtration

Water Filtration Systems

A water filter is a technology before it is a product. Every system here is sorted by where it treats water and what it reduces, with the basis shown for each claim, so you choose a type first, then a product.

A water filter is a technology before it is a product. Choose a type first, then a product.

Point of useTreats 1 outlet
Where · point of use

At one tap

Treats the water you drink and cook with, under the sink, on the counter or in a jug. Taste, odor and what is dissolved change at that one outlet. Everything else in the house is untouched.Treats the water you drink and cook with. Everything else in the house is untouched.

  • Who it suitsRenters, and anyone who won’t touch the plumbing
  • What it changesDrinking and cooking water at one tap
Point of entryTreats every outlet
Where · point of entry

Whole house

Treats every tap, shower and appliance from where the main water line enters the house. It is sized for flow, not to drinking-water standards, and whether it fits depends on your water pressure, which browsing can’t judge.Treats every tap, shower and appliance from where the main line enters. Fit depends on flow and pressure, which browsing can’t judge.

  • Who it suitsOwners with sediment, chlorine or hardness everywhere
  • Before you chooseA flow rate and a pressure reading
What · how we grade a claim

Every claim names its basis, configuration and date.

  • CertifiedCurrent, independent, for a named standard and the exact configuration sold. Lapsed is shown as lapsed.
  • Lab reportA laboratory reported a reduction, and we cite its report. Not equivalent to certification.
  • Brand’s claimThe manufacturer’s own documentation, labeled as such.
  • Not establishedWe hold no evidence we accept for this. That is a statement about our data, not a verdict on the product.
WaterDecoder’s picks · from systems in our database that qualify for this job · not a ranking

Our picks

Not curated yet

Our editors haven’t curated reverse osmosis picks yet.

There are no picks for this set yet. Every system in our database is in the catalogue below, and Finder can match one to your home.

Finder

Get personalized recommendations.

Picks are editorial and the catalogue is a list. Neither knows your water, your pressure or your cabinet. Tell Finder what you want in your own words. It asks only what it needs, then matches exact configurations.

FinderWhat do you need for your home?
Same Finder as the full experienceContinue in Finder
  • Same engine as the full Finder, in a compact frame
  • Nothing is asked twice when you continue
  • This page is context, never an answer about your home
The catalogue

All home water filters

No published products

No published products in this category yet.

We don’t have any systems in our database yet. When one is added with its evidence on file, it appears here with its basis and the facts that decide a purchase.

Finder

Not sure what you need?

Finder asks how you know, what a test found and what your home needs, then tells you plainly what it can match.

Ask Finder
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