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Water Filtration

Water Filtration for the whole home and at-the-sink. Shop complete systems, filter housings and cartridges, RO drinking water, and maintenance parts to improve taste, reduce chlorine/chloramine, and protect fixtures and appliances.

Featured brands: 3M, American Granby, Campbell, Elkay, EWS (Environmental Water Systems), The Source (twistIIClean), and Zurn Wilkins. Browse each brand below or filter to the exact type you need.

Shop by need

  • Whole-home systems: carbon filtration for city water; options with salt-free conditioning to help with scale (model dependent)
  • Under-sink drinking water: high-flow faucet filters, compact multi-stage kits, and RO (reverse osmosis) systems
  • Filter housings & cartridges: standard and high-flow sizes, sediment, carbon block/GAC, specialty media
  • Accessories & parts: install kits, valves, gauges, O-rings, wrenches, and replacement cartridges

Quick choosing guide

  1. Start with your source: municipal (chlorine/chloramine) vs well water—match filters or systems accordingly.
  2. Pick the application: whole-home (showers, laundry, appliances) or point-of-use (drinking/cooking at the sink).
  3. Size for flow: select system/house size to maintain pressure; match cartridge size (10", 20", “BB”) and micron rating to your goal.
  4. Taste vs maximum reduction: high-flow carbon for everyday taste/odor vs RO for maximum dissolved-solid reduction at a faucet.
  5. Plan maintenance: note change intervals (typically 6–12 months for cartridges; multi-year media on whole-home units).


  • EWS RO4-UV reverse osmosis system component kit with optional UV protection
    EWS RO4 four-stage under sink reverse osmosis drinking water system

    EWS RO4 and RO4-UV Four-Stage Under Sink Reverse Osmosis Systems

    EWS
    $ 951.75 - $ 1,026.75
    $ 951.75 - $ 1,026.75
    $ 951.75 - $ 1,026.75
    $ 951.75

    EWS RO4 and RO4-UV Four-Stage Under Sink Reverse Osmosis Systems Brand: EWS | SKUs: RO4, RO4-UV Product Overview The EWS RO4 and RO4-UV are fou...

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    $ 951.75 - $ 1,026.75
    $ 951.75 - $ 1,026.75
    $ 951.75 - $ 1,026.75
    $ 951.75
  • EWS F.SET.RO4 replacement filter set for RO4 reverse osmosis systems
    EWS F.SET.RO4-UV replacement filter set with UV lamp

    EWS F.SET.RO4 Replacement Filter Sets for RO4 and RO4-UV Systems

    EWS
    $ 486.75 - $ 591.75
    $ 486.75 - $ 591.75
    $ 486.75 - $ 591.75
    $ 486.75

    EWS F.SET.RO4 Replacement Filter Sets for RO4 and RO4-UV Systems Brand: EWS | SKUs: F.SET.RO4, F.SET.RO4-UV Product Overview The EWS F.SET.RO4 ...

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    $ 486.75 - $ 591.75
    $ 486.75 - $ 591.75
    $ 486.75 - $ 591.75
    $ 486.75
  • EWS RO3-UV under sink reverse osmosis system with UV protection
    EWS RO3 three-stage under sink reverse osmosis drinking water system

    EWS RO3 and RO3-UV Three-Stage Under Sink Reverse Osmosis Systems

    EWS
    $ 876.75 - $ 1,071.75
    $ 876.75 - $ 1,071.75
    $ 876.75 - $ 1,071.75
    $ 876.75

    EWS RO3 and RO3-UV Three-Stage Under Sink Reverse Osmosis Systems Brand: EWS | SKUs: RO3, RO3-UV Product Overview The EWS RO3 and RO3-UV are th...

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    $ 876.75 - $ 1,071.75
    $ 876.75 - $ 1,071.75
    $ 876.75 - $ 1,071.75
    $ 876.75
  • EWS F.SET.RO3-UV replacement filter set with UV lamp
    EWS F.SET.RO3 replacement filter set for RO3 reverse osmosis systems

    EWS F.SET.RO3 Replacement Filters for RO3 and RO3-UV Systems

    EWS
    $ 426.75 - $ 531.75
    $ 426.75 - $ 531.75
    $ 426.75 - $ 531.75
    $ 426.75

    EWS F.SET.RO3 Replacement Filters for RO3 and RO3-UV Systems Brand: EWS | SKUs: F.SET.RO3, F.SET.RO3-UV Product Overview The EWS F.SET.RO3 and ...

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    $ 426.75 - $ 531.75
    $ 426.75 - $ 531.75
    $ 426.75 - $ 531.75
    $ 426.75
  • EWS DWS-UV under sink filtration system with UV disinfection detail
    EWS DWS-UV three-stage under sink drinking water system with ultraviolet protection

    EWS DWS-UV Essential Under Sink Drinking Water System with UV Protection

    EWS
    $ 704.25 - $ 704.25
    $ 704.25
    $ 704.25 - $ 704.25
    $ 704.25

    EWS DWS-UV Essential Under Sink Drinking Water System with UV Protection Brand: EWS | SKU: DWS-UV Product Overview The EWS DWS-UV is an under s...

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    $ 704.25 - $ 704.25
    $ 704.25
    $ 704.25 - $ 704.25
    $ 704.25
  • EWS DWS under sink drinking water system kit breakdown
    EWS DWS Essential three-stage under sink drinking water filtration system

    EWS DWS Essential Under Sink Drinking Water System

    EWS
    $ 509.25 - $ 509.25
    $ 509.25
    $ 509.25 - $ 509.25
    $ 509.25

    EWS DWS Essential Under Sink Drinking Water System Brand: EWS | SKU: DWS Product Overview The EWS DWS Essential Drinking Water System is an und...

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    $ 509.25 - $ 509.25
    $ 509.25
    $ 509.25 - $ 509.25
    $ 509.25
  • EWS F.SET.DWS Essential under sink replacement filter set

    EWS F.SET.DWS Replacement Filter Set for DWS Drinking Water System

    EWS
    $ 246.75 - $ 246.75
    $ 246.75
    $ 246.75 - $ 246.75
    $ 246.75

    EWS F.SET.DWS Replacement Filter Set for DWS Drinking Water System Brand: EWS | SKU: F.SET.DWS Product Overview The EWS F.SET.DWS is the replac...

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    $ 246.75 - $ 246.75
    $ 246.75
    $ 246.75 - $ 246.75
    $ 246.75
  • EWS SS-2.5 Max Flow filter setup detail
    EWS SS-2.5 Max Flow high-flow under sink drinking water filtration system

    EWS SS-2.5 Max Flow Under Sink Drinking Water Filtration System

    EWS
    $ 348.75 - $ 348.75
    $ 348.75
    $ 348.75 - $ 348.75
    $ 348.75

    EWS SS-2.5 Max Flow Under Sink Drinking Water Filtration System Brand: EWS | SKU: SS-2.5 Product Overview The EWS SS-2.5 Max Flow is a high-flo...

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    $ 348.75 - $ 348.75
    $ 348.75
    $ 348.75 - $ 348.75
    $ 348.75
  • EWS F.SET.SS-2.5 Max Flow replacement filter cartridge

    EWS F.SET.SS-2.5 Replacement Filter for SS-2.5 Max Flow System

    EWS
    $ 186.75 - $ 186.75
    $ 186.75
    $ 186.75 - $ 186.75
    $ 186.75

    EWS F.SET.SS-2.5 Replacement Filter for SS-2.5 Max Flow System Brand: EWS | SKU: F.SET.SS-2.5 Product Overview The EWS F.SET.SS-2.5 is the repl...

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    $ 186.75 - $ 186.75
    $ 186.75
    $ 186.75 - $ 186.75
    $ 186.75
  • EWS SS-1.0 under sink single stage filtration system component detail
    EWS SS-1.0 single stage under sink drinking water filtration system

    EWS SS-1.0 Single Stage Under Sink Drinking Water Filtration System

    EWS
    $ 183.75 - $ 183.75
    $ 183.75
    $ 183.75 - $ 183.75
    $ 183.75

    EWS SS-1.0 Single Stage Under Sink Drinking Water Filtration System Brand: EWS | SKU: SS-1.0 Product Overview The EWS SS-1.0 is a single stage ...

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    $ 183.75 - $ 183.75
    $ 183.75
    $ 183.75 - $ 183.75
    $ 183.75
  • EWS F.SET.SS-1.0 replacement filter for SS-1.0 single stage system

    EWS F.SET.SS-1.0 Replacement Filter for SS-1.0 System

    EWS
    $ 111.75 - $ 111.75
    $ 111.75
    $ 111.75 - $ 111.75
    $ 111.75

    EWS F.SET.SS-1.0 Replacement Filter for SS-1.0 System Brand: EWS | SKU: F.SET.SS-1.0 Product Overview The EWS F.SET.SS-1.0 is the replacement c...

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    $ 111.75 - $ 111.75
    $ 111.75
    $ 111.75 - $ 111.75
    $ 111.75
  • EWS F.SET.DWS-UV replacement filter set with UV lamp for DWS-UV under sink system

    EWS F.SET.DWS-UV Replacement Filter Set with UV Lamp

    EWS
    $ 351.75 - $ 351.75
    $ 351.75
    $ 351.75 - $ 351.75
    $ 351.75

    EWS F.SET.DWS-UV Replacement Filter Set with UV Lamp Brand: EWS | SKU: F.SET.DWS-UV Product Overview The EWS F.SET.DWS-UV is the replacement fi...

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    $ 351.75 - $ 351.75
    $ 351.75
    $ 351.75 - $ 351.75
    $ 351.75

Pro tips: Install whole-home systems after the meter/PRV and before branches; bypass hose bibbs if you want untreated outdoor taps. Always flush new cartridges, keep spare O-rings on hand, and set a reminder for filter changes. Not sure where to start? Tell us city/well, pipe size, and what you want to improve—taste, odor, chlorine/chloramine, or scale—and we’ll dial it in.

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