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Crystal Quest Water Filters
    • Whole house Filters every tap
    • Water softeners For hard water
    • Whole house RO RO for every tap
    • Under-sink reverse osmosis For drinking water
    • Under sink Fits under the sink
    • Countertop Sits by the faucet
    • Shower and bath For shower and bath
    • Inline On a water line

    Whole house

    • Whole house Water filters
    • Whole house Reverse osmosis
    • Whole house Salt-based softeners
    • Whole house Salt-free conditioner
    • All salt-free conditioners
    • UV sterilization
    All residential systems

    Drinking water

    • Countertop
    • Inline
    • Under sink RO
    • Countertop RO
    • Reverse osmosis guide
    • Faucet mount system
    • Water pitcher
    All drinking water

    Specialty filtration

    • Acid neutralizing
    • Alkaline
    • Arsenic (whole house)
    • Radium and uranium
    • Silica
    • Sulfate
    • Tannins
    • Turbidity (cloudy water)
    All specialty filters

    More ways to filter

    • Shower and bath filters
    • Water coolers
    • Off-grid portable RO
    • Chemical dosing
    • Oxidation disinfection
    • Ozone disinfection
    • UV air sterilizer
    • Bundles
    • Gift card

    Not sure which system you need?

    Answer a few questions about your water and home to find the right system.

    Take the quiz

    Or try a focused quiz

    • Well water filter finder
    • Water softener quiz
  • By problem

    • Rotten egg smell
    • Pool smell or chlorine taste
    • Orange or rust stains
    • Black or brown stains
    • Blue-green stains
    • Cloudy water
    • Tea-colored water

    By contaminant

    • Arsenic
    • Fluoride
    • Lead
    • Iron, manganese and sulfur
    • Microplastics
    • Nitrate
    • PFAS
    All contaminants

    By water source

    • City water Chlorine, chloramine
    • Well water Iron and sulfur

    Where you live

    • Near a military base, airport or fire training site
    • Near a farm
    • Near the coast
    • Granite or mountain areas
    • Older home built before 1986

    How hard is your water?

    Enter your ZIP code to see the tap water hardness on record for your area.

    ZIP code Hardness on record Four levels Soft to very hard
    • Shower filter replacement cartridge
    • Bath Ball® replacement cartridge
    • Pitcher replacement cartridges
    • Filter cartridges
    • RO membranes
    • RO filter packs
    • UV bulbs & parts

    Cartridges and media

    • Replacement cartridges
    • Filtration media & resins
    • RO filter packs
    RO membranes and components
    • Under sink RO membrane
    • Low energy freshwater RO membrane
    • Brackish RO membrane
    • Desalination RO membrane
    • Membrane cleaners
    • RO parts and accessories
    • Water storage tanks
    Parts and equipment
    • UV bulbs & parts
    • Valve control heads
    • Pumps and motors
    Get help
    • Reorder from past orders
    • Find my filter
    • Subscribe and save
    • How often to change filters
    • When to replace a UV lamp
    • About RO membranes

    Find my filter

    Type the code printed on your cartridge.

    Common part numbers

    • Pitcher
    • CQE-RC-04002 SMART cartridge
    • CQE-RC-04000 Carbon block
  • Commercial and industrial

    Systems for your project

    Quotes on request, from a single inline filter to industrial reverse osmosis.

    Request a quote Opens in a new window. (800) 934-0051

    Industries

    • Agriculture and farming
    • Breweries
    • Cannabis cultivation
    • Commercial laundry
    • Food and beverage
    • Government and municipal
    • Medical and lab
    • Mining, oil and gas
    • Multi-residential
    • Plants and manufacturing
    • Schools and campuses
    • Service industries
    All industries

    Reverse osmosis

    • Brackish water RO
    • Seawater desalination
    • Medical-use RO
    • Dosing and pretreatment
    • Industrial RO
    • Industrial fresh water
    • Industrial brackish water
    • Industrial seawater
    Commercial RO

    Commercial systems

    • SMART systems
    • GAC systems
    • Inline systems
    • Ultrafiltration
    • Commercial softeners
    • Traditional softeners
    • Salt-free anti-scale
    • Demineralizers (DI)
    • Water stores

    Industrial

    • Industrial filtration
    • Nanofiltration
    • Industrial desalination
    • Ozone systems
    • Industrial UV
    • Chlorination
    • Industrial softeners
    • Industrial salt-free
    • Deionization
    • Wastewater reclamation
    • Containerized systems
    • Cartridge housings
    • Disaster relief
    Commercial/industrial specialty systems
    • Acid neutralizing (commercial)
    • Arsenic removal
    • Fluoride removal
    • Lead removal
    • Nitrate removal
    • Tannin removal
    • Turbidity removal
    • Iron, manganese, sulfide
    • Radium and uranium (commercial)
    • Sulfate removal
    • Silica removal
    • Alkalizer and mineralizer
  • Full water tests

    • City water test
    • Well water test
    • Radiological test
    • Complete RO water test
    • Problem check test
    • Waterborne pathogen panel
    • FHA and VA loan test
    All water tests

    Test collections

    • Specialty tests
    • Quick series tests
    • BART bacteria tests
    • Contaminant-specific tests

    Single contaminant tests

    • Lead test
    • Arsenic test
    • Fluoride test
    • Quick bacteria test
    • Nitrate and nitrite test
    • Radon test
    • Uranium test

    Free tools

    • Water hardness by ZIP
    • PFAS map
    • Water report analyzer
    • Lead in water lookup
    • Hardness converter
    • Softener size calculator
    All water tools

    Have a lab report?

    Compare your lab results with EPA limits.

    Analyze my report
  • Explore our hubs

    • Document Center
    • YouTube channel
    • Knowledge base Questions and answers
    • Educational articles Guides and how-tos
    • Video resources Watch and learn
    Articles by topic
    • Filtration systems
    • Contaminants
    • Filtration technology
    • Filter types
    • Applications

    Help and support

    • Help center
    • Order status
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    • Returns
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    • Installation guides
    • Submit a ticket Opens in a new window.
    • Contact us

    Company

    • About us
    • Reviews
    • Trustpilot reviews Opens in a new window.
    • Custom manufacturing
    • All business opportunities
    Need help? Get expert support from water filtration specialists (800) 934-0051 help@crystolquest.shop

    A water specialist can help you choose and care for your system, Monday to Friday, 9am to 5pm ET.

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  • Whole house
  • Water softeners
  • Whole house RO
  • Under-sink reverse osmosis
  • Under sink
  • Countertop
  • Shower and bath
  • Well water
  • Replacements

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Need help?(800) 934-0051

Finding a replacement?

Find the system you own, then confirm its replacement. A model or cartridge code helps.

Find replacements for my system Find your model or part number

Need help with your system?

For leaks or a system that is not working, send our team the model and a description of the problem.

Get product support Visit the Help Center

Try the code printed on your cartridge, a product name, or a problem like hard water. Or let us find it for you. Talk to a specialist

Popular searches

  • Shower filter
  • Whole house filter
  • High flow
  • Reverse osmosis
  • In-line refrigerator filter
  • Water softener

Popular replacements

See all replacements
  • Coconut Based 5-Micron Carbon Block cartridge From $22.95
  • SMART cartridge From $59.00
  • Shower Filter cartridge From $29.50
  • Bath Ball® cartridge From $39.50

Quick links

  • Check your water Hardness by ZIP code
  • Well water filter finder A short quiz that matches a system
  • Water test kits Lab tests for city and well water

Popular guides

  • How Often to Change Your Water Filter 14 min read
  • Whole House Water Filter Maintenance 11 min read
  • Hard Water 101 19 min read
  • How to Test Water Hardness at Home 6 min read

Common part numbers

  • CQE-RC-04000 Coconut Based 5-Micron Carbon Block cartridge
  • CQE-RC-04002 SMART cartridge
  • CQE-RC-04045 Shower Filter cartridge
  • CQE-RC-04052 Bath Ball® cartridge

  1. Home
  2. Search

Finding a replacement?

Find the system you own, then confirm its replacement. A model or cartridge code helps.

Find replacements for my system Find your model or part number

Need help with your system?

For leaks or a system that is not working, send our team the model and a description of the problem.

Get product support Visit the Help Center

Results for “reverse osmosis”

45 results

All Products Guides Pages

Pages

  • Page

    Home Water Filters

    Whole House Water Filters Clean Water From Every Faucet Explore ❯ These POE (point of entry) filters are the perfect addition to any sized home, apartment, or condo. These filters install at...
  • Page

    Commercial & Industrial Systems for All Service Industries

     Spas Resorts & Hotels Country Clubs Nail Salons Hair Salons Pet Groomers Car Washes Laundromats Airline Companies Water Parks Carpet Cleaning Services and a multitude of others! Benefits Sought:   Marketing value   Cleaner service   No...
  • Page

    Quick FAQ's about Smart & Eagle Systems

    What is the difference between a balanced pH and enhanced pH? The pH of pure or balanced water is very close to 7. Acidic water has a pH less than 7 and...
  • Page

    Water Stores

    Elevate Your Water Quality with Crystal Quest® Equip your water store with industry-leading filtration systems. From bottle filling stations to complete RO systems, we provide everything you need to deliver pure, safe...
  • Page

    Commercial & Industrial Food & Beverage

    Food & Alcohol Production | Restaurants & Bars Food Production: Dairies, Confectionaries, Bottling plants Benefits Sought:   Safe, clean, consistency in flavor   Consistency in production   Sanitation & Super cleanliness (liability reduction)  ...
  • Page

    Water Tests

    Understand What's in Your Water Crystal Quest® has partnered with National Testing Laboratories, a trusted leader in water analysis, to bring you accurate and reliable water testing. From well and city water...
  • Page

    Home Water Filtration Systems | Free Expert Recommendation

    Pure Water for Your Home & Family Unsure which filter is right for you? Whether you have City or Well water, our experts will analyze your needs and recommend the perfect system...
  • Page

    Warranty Information

    One Year Limited Warranty CRYSTAL QUEST® warrants your CRYSTAL QUEST® Water Filter Systems for one year from the date of purchase (except replacement filters and reverse osmosis membranes) against all defects in...
  • Page

    ANSI Standard 61 Test Protocol Performed By Independent Laboratory

    20,000 gallons of city water, spiked with high levels of specific contaminants, was run through an ERA-9500 & ERA-6500/GAC cartridge. The efficiency shown below was measured AFTER 20,000 gallons had passed through...
  • Page

    Shipping & Handling

    Specialized Shipping Crystal Quest provides exceptional methods of shipping to guarantee the safety and security of your purchase. Order by 3:00 PM Eastern on a business day and most orders leave our...
  • Page

    Ultrafiltration Water Systems

    Crystal Quest® Ultrafiltration Cater Your Unique Hydration Ultrafiltration (also called Nanofiltration) is a membrane filtration process similar to Reverse Osmosis, using hydrostatic pressure to force water through a semi-permeable membrane. Learn More...
  • Page

    About Crystal Quest

    About Crystal Quest Crystal Quest is a manufacturer of water filtration products. We ship our products worldwide and serve Residential, Commercial, and Industrial markets. Crystal Quest Overview Crystal Quest Overview Combining American...
  • Page

    What's in Your Water?

    What is in your water? How do you find out? If you live in a major city,  finding out what's in your water is simple as a search on the EPA's website by...
  • Page

    Natural Alkalizer, Ionizer, Mineralizer and Oxidation Cartridge

    In Stage 1 - water flows through pre one - micron filter pads (1 micron equals 1/25,000th of an inch), which remove suspended particles such as silt, sediment, cyst (Giardia, Cryptosporidium), sand, rust,...
  • Page

    Whole House Water Filters

    Whole House Water Filters SMART Whole House Water Filter Our flagship system for whole home protection. SMART Whole House Water Filters reduce & remove harmful contaminants using our special house blend known...
  • Page

    Commercial Nitrate Removal Water Filtration Systems

    Commercial Nitrate Removal Water Filter Systems Crystal Quest® Commercial Nitrate Removal Filtration Systems are designed and manufactured for outstanding service and are ideal for treating a variety of different water problems. Utilizing...
  • Page

    Arsenic In Your Drinking Water

    The need for safe, healthy water is critical to all human life. The substances that water dissolves can be unhealthy or even toxic. These substances can also ruin expensive plumbing fixtures and...
  • Page

    What is Deionization and How does it Work?

    What Is Deionization (DI)? Ion exchange for ultra‑low conductivity water DI resin removes dissolved mineral ions from water using ion exchange. In deionization, a cation resin (H⁺ form) replaces positive ions (Ca²⁺,...
  • Page

    Disaster Relief Water Filtration

    Disaster Relief Water Filtration Commercial Laundry Water Filtration Crystal Quest provides cutting-edge water filtration solutions for the Disaster Relief industry Delivering Unrivaled Water Filtration Solutions for Disaster Relief Sector In addition to...
  • Page

    Best Well Water Filtration Systems - Remove Iron, Bacteria & Contaminants

    Well Water Filtration Systems Complete Protection for Your Home Professional-grade well water treatment systems starting at $572. Remove iron, bacteria, sulfur, tannins, sediment, and harmful contaminants with Crystal Quest's proven filtration technology...
  • Page

    Terms, Policies & Conditions

    Please read the following carefully before you utilize our website or make a purchase. By accessing this website you agree to these terms of use. Read the following Privacy, Terms of Use,...
Previous page 12
  • Eco friendly

    Protecting our planet through sustainable practices.

  • BPA free

    Toxin-free products that put your health and the environment first.

  • ISO 9001 certified

    Quality management for product quality, customer satisfaction and steady improvement.

    View certification (PDF, opens in a new tab)
  • Built in the USA

    Supporting American jobs and contributing to our nation's economic growth.

Fresh water begins here®

Join The Quest

Water guides, new products and special offers.

For your home

Shop

  • Whole home
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  • Water coolers
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Specialty filters

  • PFAS
  • Fluoride
  • Lead
  • Arsenic
  • Iron and sulfur
  • Microplastics
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  • All contaminants

Replacement filters

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Test and learn

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For business

Commercial and industrial

  • Search by industry
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