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EWS

EWS – Environmental Water Systems delivers whole-home filtration, salt-free conditioning, and advanced drinking-water systems made in the USA. Shop the flagship whole-home appliances, under-sink filtration, reverse osmosis with optional UV, and the filter sets to keep everything performing.

Shop by category

  • Whole-home filtration (CWL series): city or well* water carbon filtration for chlorine/chloramine, taste, and odor
  • Whole-home filtration + conditioning (EWS / SPECTRUM): adds ICN salt-free conditioning to help reduce scale on plumbing and water heaters
  • Under-sink drinking water: ESSENTIAL DWS (3-stage carbon), MAX FLOW high-capacity faucet filtration
  • Reverse osmosis: ESSENTIAL RO3/RO4 systems, with optional ultraviolet (UV) models for added microbial protection
  • Filter replacements & parts: annual under-sink cartridges, RO membranes, and system-specific kits

Quick choosing guide

  1. Whole-home vs point-of-use: choose CWL for whole-home filtration; step up to EWS/SPECTRUM if you want salt-free conditioning along with filtration.
  2. City vs well water: for municipal water, select chlorine/chloramine-rated models. For wells, review a recent lab test and match any specialty needs (iron, sulfur, bacteria) with the proper EWS solution.
  3. Drinking water choices: prefer mineral taste and no storage tank? pick DWS/MAX FLOW. Want the most removal and “flat/distilled” taste? pick RO3/RO4 and add UV where you want microbial protection.
  4. Size it right: match system size/valve to your plumbing (3/4", 1", 1-1/2") and household flow so pressure stays strong.
  5. Maintenance: under-sink filters are typically replaced annually; whole-home media has multi-year life per model. Always follow the EWS service guide.

*Well water: review a current lab analysis before selecting equipment. Some wells may require pre-treatment or specialty filtration.

  • EWS BB-GUARD-FILTER-3/4 replacement cartridge for Heater Guard 3/4 inch system
    EWS BB-Guard replacement filter cartridge for Heater Guard systems

    EWS BB-GUARD-FILTER-3/4 Replacement Cartridge for Heater Guard 3/4 in.

    EWS
    $ 119.25 - $ 119.25
    $ 119.25
    $ 119.25 - $ 119.25
    $ 119.25

    EWS BB-GUARD-FILTER-3/4 Replacement Cartridge for Heater Guard 3/4 in. Brand: EWS | SKU: BB-Guard-Filter-3/4 Product Overview The EWS BB-GUARD-...

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    $ 119.25 - $ 119.25
    $ 119.25
    $ 119.25 - $ 119.25
    $ 119.25
  • EWS PLV-60-14 60 PSI pressure limiting valve

    EWS PLV-60-14 60 PSI Point-of-Use Pressure Limiting Valve

    EWS
    $ 78.75 - $ 78.75
    $ 78.75
    $ 78.75 - $ 78.75
    $ 78.75

    EWS PLV-60-14 60 PSI Point-of-Use Pressure Limiting Valve Brand: EWS | SKU: PLV-60-14 Product Overview The EWS PLV-60-14 is a point-of-use pres...

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    $ 78.75 - $ 78.75
    $ 78.75
    $ 78.75 - $ 78.75
    $ 78.75
  • 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 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 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 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 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 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 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 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 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 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 TT1054-V2 electronic controller detail
    EWS TT1054-V2 twin-tank salt softener system

    EWS TT1054-V2 Twin-Tank Salt Water Softener System

    EWS
    $ 2,985.00 - $ 2,985.00
    $ 2,985.00
    $ 2,985.00 - $ 2,985.00
    $ 2,985.00

    EWS TT1054-V2 Twin-Tank Salt Water Softener System Brand: EWS | SKU: TT1054-V2 Product Overview The EWS TT1054-V2 is a twin-tank salt water sof...

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    $ 2,985.00 - $ 2,985.00
    $ 2,985.00
    $ 2,985.00 - $ 2,985.00
    $ 2,985.00
  • EWS whole house water filtration and conditioning system product image

    EWS-1035 Whole House Filtration and Salt-Free Conditioning System

    EWS
    $ 3,221.25 - $ 3,221.25
    $ 3,221.25
    $ 3,221.25 - $ 3,221.25
    $ 3,221.25

    EWS-1035 Whole House Filtration and Salt-Free Conditioning System Brand: EWS | SKU: EWS-1035 Product Overview The EWS-1035 is a whole-house fil...

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    $ 3,221.25 - $ 3,221.25
    $ 3,221.25
    $ 3,221.25 - $ 3,221.25
    $ 3,221.25

Pro tips: For whole-home installs, place the system after the meter/pressure reducer and before branches; bypass hose bibbs if you prefer. Verify chloramine vs chlorine on city reports, size by plumbing diameter/flow, and schedule annual under-sink cartridge changes. Considering RO? Plan space for the tank (RO3/RO4) and add UV if desired. Questions? Send your water report (or city name), pipe size, and household size—we’ll dial in the right EWS system and filters.

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