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Crystal Quest Whole House Reverse Osmosis System

Key Features

  • Various configurations to meet your needs
  • Backed by more than 25 years of experience
  • Made in the USA
  • Scientific World Products ISO Certified Components
Regular price $2,22700
Flow Rate: 300 GPD Configuration: Standalone Pump: Brass Rotary
SKU: CQE-CO-02023R

Clean, Great-Tasting Water at Every Tap

Crystal Quest Whole House Reverse Osmosis System delivers commercial-grade purification for your entire home, built on more than 25 years of filtration engineering. Every system is assembled, tested, and run before it ships, so it arrives operational and ready to install with only minimal plumbing required. With regular prefilter and membrane changes, these systems are built to run for 15 to 20 years.

Built as a Long-Term Investment

Every system is modular, easy to service, and economical to operate. Whole-house RO is a long-term investment in your home and your family's water, and this system is designed to earn its keep: low maintenance, long service life, and consistent water quality year after year.

A System Sized to Your Home

No two homes use water the same way. With flow rates ranging from 300 to 7,000 GPD, you can match the system to your household size, daily usage, and available space instead of settling for a one-size-fits-all unit.

Benefits at a Glance

  • Compact, space-saving footprint
  • Easily accessible components for simple servicing
  • Expandable, lightweight, modular design
  • Fully equipped and customizable
  • Low operating costs and low cost of maintenance
  • Easy to maintain and service
  • Factory tested and preserved before shipping
  • CE compliant
  • Made in the USA
  • Built with ISO-certified components

What's Inside a Storage Tank Kit

  • The RO System: A commercial-grade reverse osmosis unit with built-in prefiltration to extend the life of the membranes.
  • Water Storage Tank: An atmospheric storage tank in 165, 220, or 500 gallons, sized to your system, your needs, and your space.
  • Pump: As water is used throughout your home, it is pumped from the tank on demand.
  • Float Switches: Positioned inside the tank, these regulate when the RO system turns on and off based on the water level.

Please note: orders with 500-gallon storage tanks may carry additional shipping charges.

Optional Add-Ons

  • 12 GPM UV Water Sterilizer: Added protection that helps prevent microbiological contamination.
  • Alkalizing Postfilter: Enhances the alkalinity of your water before it enters the home, with the natural benefits of a whole-house alkalizing, mineralizing, and oxidation filter.
  • Remineralizer System: Adds essential minerals back into your purified water and adjusts its pH for healthier, better-tasting water and longer-lasting plumbing.

Why a Remineralizer Matters

Reverse osmosis produces exceptionally pure water, which naturally contains no minerals and can run slightly acidic. Water with a pH below 6.4 is not recommended for human or livestock consumption, and acidic water can be hard on plumbing and fixtures over time. Added as a final treatment step, a remineralizer raises the pH and alkalinity of your water, protects your plumbing, and gives the water a fresher, cleaner taste.

We match the remineralizer to your system's daily output:

Daily Output Recommended Remineralizer
300 to 2,500 GPD Single Big Blue alkalizer / remineralizer
4,000 to 5,000 GPD Remineralizer system (1.5 cubic feet)
7,000 GPD Remineralizer system (2.0 cubic feet)

If you prefer highly alkaline water, you can choose a larger remineralizer than recommended. Keep in mind that very high alkalinity can give water a taste some people find unpleasant, sometimes described as plastic, metallic, chlorine-like, or fishy.

Popular Upgrades

Every system comes standard with a wide range of features, and can be tailored further to fit specialized water treatment needs. Here are some of the most requested upgrades:

  • Stainless-Steel Rotary Vane Pump: A longer lifespan and greater resistance to high-TDS feed water and corrosive materials such as dosing chemicals and antiscalants.
  • Concentrate Recycle Valve: Increases efficiency by recycling wastewater back into the feed stream to raise the system's recovery rate.
  • Digital Dual TDS Controller: Monitors feed and permeate TDS levels at the same time to track salt rejection and membrane performance.
  • Digital TDS Controller: Monitors either feed or permeate TDS levels.
  • Digital TDS / Conductivity Controller: Monitors permeate TDS and conductivity, useful for evaluating overall system performance.
  • Computer Controller with Feed Flush: Adds pre-treatment lockout, tank level input, and a convenient LED status display.
  • Advanced Computer Controller with Feed Flush: Adds pre-treatment lockout, tank level input, an LED status display, and an alarm function (available on 4,000 GPD and up).
  • Chemical Pump Outlet: Provides an integrated power source for connecting a chemical feed pump.
  • Blending Valve: Blends feed water into the final RO permeate to reach a desired permeate TDS.
  • Permeate Sample Port: Allows evaluation of individual membrane performance, which aids in troubleshooting and maintenance.
  • 240V or 110V (50 to 60 Hz): Select the voltage and frequency your installation requires.
  • Single Wood Crate

Good to Know

All systems are rated for 77°F water with total dissolved solids (TDS) under 2,000. Please refer to the specifications for the exact system you plan to purchase. If your water falls outside these ranges, contact us before ordering and we'll recommend the right configuration for your home.


Ready to bring lasting, great-tasting water to every tap? Choose your flow rate and configuration above, or reach out if you'd like help matching a system to your home.

Operating Specifications

Specification Value
Weight 50–265 lbs
Motor 0–1.5 HP
Voltage 110V/220V*
Frequency 50 or 60 Hz
Feed Connection 3/8" or 1"
Product Connection 3/8" or 1"
Waste Connection 1/4", 3/8", or 1"
Minimum NaCl Rejection 96%
Minimum Feed Pressure 45 PSI
Maximum NaCl Rejection 98.5%
Minimum Feed 1–10 GPM
Maximum Hardness 15 grains/gallon
Maximum TDS 1,000–2,000 ppm
Operating Pressure 50–150 PSI
pH Range 3–11

System Dimensions

Flow Rate Dimensions
300 GPD 17" × 23" × 35"
400 GPD 17" × 23" × 35"
500 GPD 18" × 24" × 49"
750 GPD 18" × 24" × 49"
1000 GPD 18" × 24" × 49"
1500 GPD 18" × 24" × 49"
1800 GPD 20" × 24" × 51"
2500 GPD 18" × 24" × 49"
4000 GPD 30" × 36" × 59"
5000 GPD 30" × 36" × 59"
7000 GPD 30" × 36" × 59"

Storage Tank Sizes

System Capacity Recommended Tank
200–300 GPD 165 gal, 31"D × 56"H
500–2,500 GPD 220 gal, 42"D × 44"H
4,000–7,000 GPD 500 gal, 64"D × 46"H

Home Water Usage

System Capacity Typical Home Size
200–300 GPD Approximately 1–1.5 bathrooms
500–2,500 GPD Approximately 1–4 bathrooms
4,000–7,000 GPD Approximately 5+ bathrooms

Replacement Membranes & Cartridges

System Replacement Item SKU
300 GPD (1) 2.5" × 14" Reverse Osmosis Membrane CQE-RC-04111
300 GPD (1) 2.5" × 20" Sediment Reusable Pleated Filter Cartridge CQE-RC-04015
300 GPD (1) 2.5" × 20" Coconut-Based Carbon Block Filter Cartridge CQE-RC-04014
300 GPD (1) 2.5" × 20" SMART Filter Cartridge CQE-RC-04016
400 GPD (1) 2.5" × 21" Reverse Osmosis Membrane CQE-RC-04084
400 GPD (1) 2.5" × 20" Sediment Reusable Pleated Filter Cartridge CQE-RC-04015
400 GPD (1) 2.5" × 20" Coconut-Based Carbon Block Filter Cartridge CQE-RC-04014
400 GPD (1) 2.5" × 20" SMART Filter Cartridge CQE-RC-04016
500 GPD (2) 2.5" × 21" Reverse Osmosis Membranes CQE-RC-04084
500 GPD (1) 5" × 10" Sediment Reusable Pleated Filter Cartridge CQE-RC-04033
500 GPD (1) 5" × 10" SMART Filter Cartridge CQE-RC-04027
750 GPD (1) 2.5" × 40" Reverse Osmosis Membrane CQE-RC-04109
750 GPD (1) 5" × 10" SMART Filter Cartridge CQE-RC-04027
750 GPD (1) 5" × 10" Sediment Reusable Pleated Filter Cartridge CQE-RC-04033
1,000 GPD (3) 2.5" × 21" Reverse Osmosis Membranes CQE-RC-04084
1,000 GPD (1) 5" × 10" SMART Filter Cartridge CQE-RC-04027
1,000 GPD (1) 5" × 10" Sediment Reusable Pleated Filter Cartridge CQE-RC-04033
1,500 GPD (2) 2.5" × 40" Reverse Osmosis Membranes CQE-RC-04109
1,500 GPD (1) 5" × 20" Sediment Reusable Pleated Filter Cartridge CQE-RC-04034
1,500 GPD (1) 5" × 20" SMART Filter Cartridge CQE-RC-04030
1,800 GPD (1) 4" × 40" Reverse Osmosis Membrane CQE-RC-04086
1,800 GPD (1) 5" × 20" Sediment Reusable Pleated Filter Cartridge CQE-RC-04034
1,800 GPD (1) 5" × 20" SMART Filter Cartridge CQE-RC-04030
2,500 GPD (3) 2.5" × 40" Reverse Osmosis Membranes CQE-RC-04109
2,500 GPD (1) 5" × 20" Sediment Reusable Pleated Filter Cartridge CQE-RC-04034
2,500 GPD (1) 5" × 20" SMART Filter Cartridge CQE-RC-04030
4,000 GPD (2) 4" × 40" Reverse Osmosis Membranes CQE-RC-04086
4,000 GPD (1) 5" × 20" Sediment Reusable Pleated Filter Cartridge CQE-RC-04034
4,000 GPD (1) 5" × 20" SMART Filter Cartridge CQE-RC-04030
4,000 GPD (1) 5" × 20" Coconut-Based Carbon Block Filter Cartridge CQE-RC-04036
5,000 GPD (3) 4" × 40" Reverse Osmosis Membranes CQE-RC-04086
5,000 GPD (1) 5" × 20" Sediment Reusable Pleated Filter Cartridge CQE-RC-04034
5,000 GPD (1) 5" × 20" SMART Filter Cartridge CQE-RC-04030
5,000 GPD (1) 5" × 20" Coconut-Based Carbon Block Filter Cartridge CQE-RC-04036
7,000 GPD (4) 4" × 40" Reverse Osmosis Membranes CQE-RC-04086
7,000 GPD (1) 5" × 20" Sediment Reusable Pleated Filter Cartridge CQE-RC-04034
7,000 GPD (1) 5" × 20" SMART Filter Cartridge CQE-RC-04030
7,000 GPD (1) 5" × 20" Coconut-Based Carbon Block Filter Cartridge CQE-RC-04036
7,000 GPD (1) 5" × 20" GAC Filter Cartridge (Coconut Shell Granular Activated Carbon) CQE-RC-04106

Installation Resources

Use the installation manual that matches your system capacity and configuration.

200–400 GPD Installation Manual

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