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
- 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.
- 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.
- 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.
- Size it right: match system size/valve to your plumbing (3/4", 1", 1-1/2") and household flow so pressure stays strong.
- 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.
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EWS -F.SET.DWS-UV – Replacement Filter Set with UV Lamp for Under Sink EWS DWS-UV
EWSOriginal price $ 329.25 - Original price $ 329.25Original price$ 329.25$ 329.25 - $ 329.25Current price $ 329.25| /F.SET.DWS-UV – Replacement Filter Set with UV Lamp for EWS DWS-UV The F.SET.DWS-UV is the complete replacement kit for the EWS DWS-UV Essential Dri...
View full detailsOriginal price $ 329.25 - Original price $ 329.25Original price$ 329.25$ 329.25 - $ 329.25Current price $ 329.25| / -
EWS - F.SET.RO4 & F.SET.RO4-UV – Replacement Filter Sets for EWS RO4 Under Sink Reverse Osmosis Systems
EWSOriginal price $ 486.75 - Original price $ 569.25Original price$ 486.75 - $ 569.25$ 486.75 - $ 569.25Current price $ 486.75| /F.SET.RO4 & F.SET.RO4-UV – Replacement Filter Sets for Under Sink EWS RO4 Reverse Osmosis Systems Keep your reverse osmosis system performing l...
View full detailsOriginal price $ 486.75 - Original price $ 569.25Original price$ 486.75 - $ 569.25$ 486.75 - $ 569.25Current price $ 486.75| / -
EWS - F.SET.RO3 & F.SET.RO3-UV – Replacement Filters for EWS Under Sink Reverse Osmosis RO3 & RO3-UV Systems
EWSOriginal price $ 426.75 - Original price $ 509.25Original price$ 426.75 - $ 509.25$ 426.75 - $ 509.25Current price $ 426.75| /F.SET.RO3 & F.SET.RO3-UV – Under Sink Replacement Filters The F.SET.RO3 and F.SET.RO3-UV are the official replacement filter kits for the EWS R...
View full detailsOriginal price $ 426.75 - Original price $ 509.25Original price$ 426.75 - $ 509.25$ 426.75 - $ 509.25Current price $ 426.75| / -
EWS - F.SET.DWS Essential Under Sink DWS Filter Set
EWSOriginal price $ 246.75 - Original price $ 246.75Original price$ 246.75$ 246.75 - $ 246.75Current price $ 246.75| /F.SET.DWS – Replacement Water Filter Set for EWS DWS The F.SET.DWS replacement set keeps your EWS Essential Drinking Water System (DWS) performing ...
View full detailsOriginal price $ 246.75 - Original price $ 246.75Original price$ 246.75$ 246.75 - $ 246.75Current price $ 246.75| / -
EWS - F.SET.SS-2.5 - SS Filter Replacement - Under Sink Max Flow Filtration System
EWSOriginal price $ 171.75 - Original price $ 171.75Original price$ 171.75$ 171.75 - $ 171.75Current price $ 171.75| /Key Benefits & Features High flow, no compromise — up to 2.5 gallons per minute, matching typical faucet speeds. No tank, no water waste — ...
View full detailsOriginal price $ 171.75 - Original price $ 171.75Original price$ 171.75$ 171.75 - $ 171.75Current price $ 171.75| / -
EWS - F.SET.SS-1.0 – Replacement Filter for Under Sink EWS SS-1.0 Single Stage System
EWSOriginal price $ 81.75 - Original price $ 81.75Original price$ 81.75$ 81.75 - $ 81.75Current price $ 81.75| /F.SET.SS-1.0 – Replacement Filter for EWS SS-1.0 Single Stage System The F.SET.SS-1.0 is the official replacement cartridge for the EWS SS-1.0 Esse...
View full detailsOriginal price $ 81.75 - Original price $ 81.75Original price$ 81.75$ 81.75 - $ 81.75Current price $ 81.75| / -
EWS RO4 & RO4-UV – Four-Stage Under Sink Reverse Osmosis Systems with Optional UV Protection
EWSOriginal price $ 801.75 - Original price $ 1,026.75Original price$ 801.75 - $ 1,026.75$ 801.75 - $ 1,026.75Current price $ 801.75| /EWS RO4 & RO4-UV – Four-Stage Under Sink Reverse Osmosis Drinking Water Systems The EWS RO4 is a high-performance reverse osmosis system that d...
View full detailsOriginal price $ 801.75 - Original price $ 1,026.75Original price$ 801.75 - $ 1,026.75$ 801.75 - $ 1,026.75Current price $ 801.75| / -
EWS RO3 & RO3-UV – Essential Three-Stage Under Sink Reverse Osmosis Systems
EWSOriginal price $ 726.75 - Original price $ 951.75Original price$ 726.75 - $ 951.75$ 726.75 - $ 951.75Current price $ 726.75| /EWS RO3 & RO3-UV – Essential Three-Stage Under Sink Reverse Osmosis Systems The EWS RO3 is a high-performance, three-stage reverse osmosis (RO)...
View full detailsOriginal price $ 726.75 - Original price $ 951.75Original price$ 726.75 - $ 951.75$ 726.75 - $ 951.75Current price $ 726.75| / -
EWS SS-2.5 Max Flow – High-Flow Under Sink Drinking Water Filtration
EWSOriginal price $ 321.75 - Original price $ 321.75Original price$ 321.75$ 321.75 - $ 321.75Current price $ 321.75| /The EWS SS-2.5 Max Flow (often branded “Max Flow”) is a powerful under-sink drinking water filter engineered to deliver filtered water at the speed...
View full detailsOriginal price $ 321.75 - Original price $ 321.75Original price$ 321.75$ 321.75 - $ 321.75Current price $ 321.75| / -
EWS DWS-UV – Essential Under Sink Drinking Water System with Ultraviolet Protection
EWSOriginal price $ 704.25 - Original price $ 704.25Original price$ 704.25$ 704.25 - $ 704.25Current price $ 704.25| /EWS DWS-UV – Essential Under-Sink Drinking Water System with Ultraviolet Protection The EWS DWS-UV is the ultimate under-sink drinking water system...
View full detailsOriginal price $ 704.25 - Original price $ 704.25Original price$ 704.25$ 704.25 - $ 704.25Current price $ 704.25| / -
EWS DWS– Essential Under Sink Drinking Water System
EWSOriginal price $ 479.25 - Original price $ 479.25Original price$ 479.25$ 479.25 - $ 479.25Current price $ 479.25| /EWS DWS– Essential Under-Sink Drinking Water System The EWS DWS Essential Drinking Water System is a compact, high-performance under-sink system en...
View full detailsOriginal price $ 479.25 - Original price $ 479.25Original price$ 479.25$ 479.25 - $ 479.25Current price $ 479.25| / -
EWS - SS-1.0 - Single Stage Under Sink Drinking Water Filtration System
EWSOriginal price $ 171.75 - Original price $ 171.75Original price$ 171.75$ 171.75 - $ 171.75Current price $ 171.75| /EWS SS-1.0 – Essential Single Stage Filtration System The EWS SS-1.0 is a compact and effective under-sink water filtration system designed to deli...
View full detailsOriginal price $ 171.75 - Original price $ 171.75Original price$ 171.75$ 171.75 - $ 171.75Current price $ 171.75| /
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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