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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

    Every system built to order

    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 “water softener”

47 results

All Products Guides Pages

Pages

  • Page

    Water Softener Quiz

  • Page

    Water Softener Regeneration Calculator

  • Page

    Industrial Water Softener Systems

  • Page

    Water Softener Comparison Guide

    Exchange Capacity (Grains) @15 #/ Ft3 30,000 30,000 45,000 45,000 60,000 60,000 90,000 120,000 210,000 300,000 450,000 600,000 900,000 1,200,000 Model CQE-CO-02037 CQE-CO-02038 CQE-CO-02039 CQE-CO-02040 CQE-CO-02041 CQE-CO-02042 CQE-CO-02043 CQE-CO-02044 CQE-CO-02045 CQE-CO-02046 CQE-CO-02047...
  • Page

    commercial water softeners

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    EAGLE® SOFT SALT-FREE WATER SOFTENER FAQ'S

    What is hard water and why soften it? Hard water contains a high percentage of dissolved minerals such as calcium and magnesium and multivalent cations. Hard water can produce scale, which is...
  • Page

    Do Salt-Free Water Softeners Work?

    Hard water can also produce a rock-like scale that builds up in pipes, water heaters, plumbing fixtures, dishwashers and other water-related appliances. Do Salt-Free Water Softeners Work Many questions arise when people...
  • Page

    Water Softener Sizing Calculator | Calculate Grain Requirements

  • Page

    Industrial Salt-Free Water Softener (Anti-Scale) Systems

  • Page

    Full-Size Water Filters

    Economy Family Size: 1-3 people  4 Stages of Filtration   Fiberglass Tank; 1.5 Cu. Ft. Media  Service Flow: 7-9 GPM  System Capacity: 600,000 Gallons  Pre-Filter: Sediment Post-Filter: Carbon Block  Up-Flow Down-Flow Backwash   Bypass Valve...
  • Page

    How Iron Water Filters Work

    Effective for Reducing Iron & Manganese CRYSTAL QUEST ® Utilizing the latest technologies in water industry, coupled with 30 years of manufacturing expertise, we provide you with the most effective, healthy, great-tasting...
  • Page

    How Arsenic Water Filters Work

    Crystal Quest® utilizes the latest technologies in the water industry, coupled with 30 years of manufacturing expertise, we provide you with the most effective, healthy, great-tasting water conveniently at the most affordable price....
  • 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

    Frequently Asked Questions About Water

    Water Basics Water is generally classified into two groups: Surface Water and Ground Water. Surface water is just what the name implies; it is water found in a river, lake or other...
  • Page

    Coffee Water Filtration

    Coffee Water Filtration Elevate Your Coffee Experience with Crystal Quest Water Filters Smart GAC Filtration System SMART GAC Water Filtration System reduces & removes harmful contaminants using our special house blend known...
  • 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...
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    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

    Cannabis Water Filtration

    Cannabis Water Filtration Cannabis Water Filtration Optimize Your Commercial Cannabis Cultivation with Crystal Quest's Commercial RO Systems Unlock the full potential of your commercial cannabis operation with Crystal Quest's cutting-edge water filtration...
  • 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

    Control Valves for Water Filtration

    Are you looking for efficient, durable, and innovative valve control heads? Our collection of analog and digital NXT valves stand out for their exceptional reliability, robust construction, and cutting-edge technology, offering superior...
  • Page

    Commercial Laundry Water Filtration

    Commerical Laundry Water Filtration Commercial Laundry Water Filtration Crystal Quest provides cutting-edge water filtration solutions for the Commercial Laundry industry Delivering Unrivaled Water Filtration Solutions for Commercial Laundry we specialize in providing...
  • 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

    Medical & Laboratory Water Filtration

    Laboratory & Medical Water Filtration Laboratory & Medical Water Filtration Superior Medical Water Filtration Systems: Ensuring Uncompromising Purity for Essential Lab & Healthcare Applications Transforming Healthcare with Advanced Medical Water Filtration Solutions...
  • Page

    Guardian Series Whole House Water Filters

    Guardian Series Whole House Water Filters Crystal Quest Guardian Series Whole House Water Filter Systems are designed and manufactured for outstanding service and are ideal for treating a variety of different water...
12 Next page
  • 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®

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Specialty filters

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  • Fluoride
  • Lead
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  • Iron and sulfur
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For business

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