EWS is recognized in the industry as the most water-knowledgeable company and the top water filtration product available. Our EWS Spectrum whole home filtration has been chosen as the exclusive water filtration appliance of the National Association of Home Builders (NAHB), The New American Home and the International Builder’s Show. EWS products have been repeatedly recognized as the top water filtration product by Building Products Magazine, Builder Magazine, and more. In addition to our industry-leading quality and high standards, our award-winning customer service provides up-to-date information on the latest water concerns and reports. Our extraordinary customer support and nationwide representation also provides showrooms throughout the USA with EWS product training for on-location service and support to our customers.
*Note
Standard RO and RO-UV Systems come complete with chrome faucet with black trim and all filters (UV lamp as applicable), air gap adapter, storage tank, drain assembly, tubing and connections for RO installation. Limited dispenser option available (black trim kit or brushed nickel finish) or can be installed to other dispensers if RO compatible. Can be cross-connected (check other mfg. warranty issues with RO systems or water) to ice-makers, instant hot and chillers, based on customer preference or need.
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At A Glance
Features & Benefits
Enjoy contaminant-free water that meets your preferences for taste (i.e. “flatter” taste) and removal of minerals, total dissolved solids, fluoride and inorganics.
*WELL WATER WARNING Well water is required to have independent, complete and proper testing of your well water to determine the proper course of action in order to specify the correct system(s).
Unparalleled product quality and longevity. Award-winning customer service and expertise. Over 98% customer satisfaction. Top-performing, USA-made filtration is all we do.
The ESSENTIAL RO4 System can be installed at a kitchen sink, wet bar, or bathroom sink. Enjoy delicious, better-than-bottled quality right at your sink, on-demand! Save over $2,000 per year in bottled water costs.
Enjoy contaminant-free water that meets your preferences for taste (i.e. “flatter” taste) and removal of minerals, total dissolved solids, fluoride and inorganics.
*Not to exceed 1 year. Filter life also depends on your water usage and water quality.
Real Protection from Contaminants. The Essential RO3 was designed from the ground up with our full bed depth, fully compliant, USA made filters to handle difficult contaminants like chloramine (chlorine and ammonia compound). It is a new breed of reverse osmosis that effectively protects you from chloramine, chlorine, THMs, lead and cysts.
Our filtration appliances are in use worldwide by hospitals, medical centers, health and fitness centers, military, professional athletes, and thousands of personal homes worldwide.
Healthier Home & Lifestyle. All our sink filtration systems are designed to prevent you and your family from drinking various contaminants and carcinogenic (cancer-causing) chemicals. Enjoy chlorine-free, healthy, filtered water – use for drinking, filling up a pet's water bowl, watering plants, making tea and coffee, or filling up the humidifier with chlorine-free filtered water.
Easy to Install & Self-Maintains. Our RO4 is a hassle-free, user-friendly system that only requires a filtration replacement about once per year (based on your local water conditions and usage).
The Highest Quality Possible. We are known throughout the industry for our impeccably high standards, quality materials, and American manufacturing that meets or exceeds all FDA, NSF, ANSI, and California State standards and compliances.
Environmentally-Friendly & Cost-Effective. Our sink filtration systems are the environmentally-friendly, maintenance-free choice to filter your water — no toxic chemicals, no corrosive salts, no metal resins, no gimmicks. Replace expensive and wasteful bottled water with healthy, filtered EWS water from your sink. Our parts are recyclable and our proprietary filtration media is completely compostable and biodegradable.
Model #: RO4
Height: 16″ (allow 4" clearance in order to replace filters easily)
Width x Depth: 5" x 13"
Tank Size: 11"w x 11"d x 16"h, 3.2 gallon capacity
Weight: 20 lbs. total
Flow Rate: up to 1 gallon per minute
Filter Capacity: as needed, or up to 1 year (not to exceed a year)
Filter Replacement #: F.SET.RO4
Exterior Materials: White BPA-free, phthalate-free virgin polypropylene. Recyclable.
Filtration Media: NSF/ANSI and FDA compliant GAC pre-filteration, 1 micron activated carbon block, TFC RO 50-gpd membrane.
Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system. Install in cold water feed applications only. Install in compliance with local and state regulations.
Best to use to filter salt softened water (sodium or potassium chloride).
Based on your local water conditions and usage.
WELL WATER WARNING: Well water is required to have independent, complete and proper testing of your well water to determine the proper course of action in order to specify the correct system(s).
Moderately Difficult Installation. Professional installation is strongly recommended. The Essential RO System comes complete and fully assembled with everything you need for a proper installation: filters, membrane, connections, 2.5 feet of white and blue tubing, mounting bracket and service manual. (UV lamp and transformer - with UV disinfection RO3-UV & RO4-UV systems only, 5 micron pre-sediment filter with 4 stage RO4 & RO4-UV systems only.)
Easy Replacement. System maintenance is simple. Replace the 2 filters and membrane with RO3 and the 3 filters and membrane with RO4 (and the UV lamp if applicable with the RO3-UV or RO4-UV) when needed, up to 1 year. It is a quick process of shutting off the water at your sink, a quick twist-off of the old filters and membrane (and the removal of the UV lamp, if applicable) and a quick twist-in of the new filters and membrane (and insert of the UV lamp, if applicable).
CAUTION: Once filters have been replaced, proper RO startup is required.
For replacement parts and kits inquire about your specific model below and contact us for a quote.
Parts List
Current Filter Replacement Index
Media Replacement Index
Pre-2012 Sink Filter Replacements
"How to Select" the Right System for You
Product Summary Tearsheet
RO Service Guide for Installation and Specifications
Click Here to See What our Filters Remove
Product Compliance
How to Determine Line Size
Quick Reference Guide
Warranty
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Welcome to Apex Hardware NY! We're a small business that takes pride in our close partnerships with a diverse network of suppliers. These collaborations help us maintain a robust inventory and ensure your orders are processed smoothly. While we make every effort to keep a wide range of products in stock, there are times when we rely on external suppliers, leading to occasional shortages. We're diligent about updating our inventory, but please understand that delays can happen. Before making a purchase, feel free to reach out to us to verify availability. Your patience and understanding are greatly appreciated as we strive to provide you with the best possible shopping experience!
