Best Whole-House Water Filters Ranked

19 whole-house water filters, scored on cost per 1,000 gallons, certification, flow, price and warranty.

Last updated: November 2, 2026

A whole-house filter sits on the main water line where it enters the house, so every tap, shower and appliance gets filtered water. Most are bought to take out chlorine taste and smell and sediment from city water. These rankings compare what the makers publish on the same terms: what the filters cost to replace for every 1,000 gallons, whether the filtration is certified by an accredited body, how much water it passes, what it costs and how long it’s covered.

Build is the first choice. A cartridge system holds filters in big plastic housings and is cheap to buy, but the cartridges are swapped every few months to a year. A tank system holds a bed of carbon media that lasts years, costs more up front and needs less upkeep; some backwash themselves and need a drain and an outlet.

Your water is the second. Many cities disinfect with chloramine instead of chlorine, and plain carbon handles chloramine poorly; look for catalytic carbon and a maker claim for chloramine. Check your water report before buying.

Flow is the third. A filter that can’t keep up drops the pressure when two showers run at once. A small house gets by on 7 to 10 gpm; a large one with three or more bathrooms wants 12 to 15 gpm.

Top Picks

Shop by Build

Cartridge

13 ranked

Filters in big housings on the main line: cheap to buy, with cartridges swapped every few months.

Top rated: Waterdrop WHF21-PG $106.98

Tank

6 ranked

Carbon media tanks that last years between changes: more up front, less to maintain.

Top rated: A. O. Smith AO-WH-FILTER $399

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Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.

Best Whole-House Cartridge Water Filters

  1. Waterdrop WHF21-PG
    #1 of 133.4Full review

    A low cost starter system for chlorinated city water in a small home.

    Amazon $106.98
    $106.98
    -15 gpm-
  2. iSpring WGB21B
    #2 of 133.4Full review

    A low cost first whole-house filter for city water with chlorine taste. Expect to change filters several times a year.

    Amazon $155.99
    $155.99
    $0.90 per 1,000 gal15 gpm50,000 gal
  3. Waterdrop WHF3T-PG
    #3 of 133.2Full review

    A lower priced three stage big blue system for city water. Running cost is hard to judge without a gallon rating.

    Amazon $269.99
    $269.99
    -15 gpm-
  4. 3M Aqua-Pure AP903
    #4 of 133.1Full review

    A certified, low mess choice for city water with chlorine, for owners who would rather pay more per cartridge than handle filters.

    Amazon $422.99
    $422.99
    $2.45 per 1,000 gal10 gpm100,000 gal
  5. iSpring WGB22B
    #5 of 133.1Full review

    A sensible upgrade on the WGB21B for a family on chlorinated city water, with filters that last longer and cost little per gallon.

    Amazon $286.70
    $286.70
    $0.83 per 1,000 gal15 gpm100,000 gal

See all 13 best whole-house cartridge water filters

Best Whole-House Tank Water Filters

  1. A. O. Smith AO-WH-FILTER
    #1 of 63.6Full review

    A certified, maintenance light tank for a small or medium home on chlorinated city water.

    Amazon $399
    $399
    $0.67 per 1,000 gal7 gpm600,000 gal
  2. Aquasana Rhino WH-1000
    #2 of 63.3Full review

    For a household that wants to fit a filter and forget it for a decade on chlorinated city water.

    Amazon $999
    $999
    $0.95 per 1,000 gal7 gpm1,000,000 gal
  3. iSpring WF150K
    #3 of 63.3Full review

    A backwashing carbon tank for owners who want a long life system with a long warranty and have a drain nearby.

    Amazon $1,673.70
    $1,673.70
    ---
  4. Aquasana Rhino Max Flow with UV
    #4 of 63.2Full review

    For a large house that needs high flow and wants UV added. Most city homes can skip the UV and pay less.

    Amazon $2,246.99
    $2,246.99
    $1.30 per 1,000 gal14 gpm1,000,000 gal
  5. LiquaGen FK-CAT 10x54
    #5 of 62.9Full review

    A cheaper backwashing catalytic carbon tank for a large city home with chloramine. Its claims are not backed by testing or a warranty term.

    Amazon $849.99
    $849.99
    $0.85 per 1,000 gal12 gpm1,000,000 gal

See all 6 best whole-house tank water filters

How We Rank

Each filter is ranked against others of the same build, and scored on what its replacement filters or media cost per 1,000 gallons, its certification, its service flow, its price and its warranty.

FactorMeasuresWeight
Running costreplacement filters or media per 1,000 gallons25%
CertificationNSF/ANSI certification by an accredited body25%
Flowservice flow rate15%
Priceprice of the system20%
Warrantywarranty length15%

How we rank explains each factor in full.