The Crystal Quest Ceramic Under Sink Water Filtration System is a point-of-use drinking water filter designed to install beneath a sink and connect to the included faucet and installation hardware. It is available in single, double, and triple configurations, with the installation valve selected based on the home’s under-sink plumbing. The system uses a ceramic cartridge listed for filtration as low as 0.5 microns, with SMART and carbon block filtration stages included depending on the selected configuration. The ceramic cartridge is listed by Crystal Quest for reducing/removing certain bacteria, cysts, and sediment from water and can be cleaned up to 30 times. With a listed 0.5 GPM maximum flow rate and 1/4" connection size, this under-sink ceramic water filter is intended for point-of-use drinking water applications in homes, apartments, offices, and similar settings where ceramic filtration and routine cartridge maintenance are appropriate.
This Crystal Quest system installs beneath the sink to keep the filter housing out of sight and off the countertop. It is designed for point-of-use drinking water applications where ceramic filtration, under-counter placement, and the included faucet setup are preferred.
The ceramic cartridge is listed for filtration as low as 0.5 microns. Crystal Quest lists the ceramic cartridge for reducing/removing bacteria such as E. coli, Fecal coliform, Salmonella, and Streptococcus, as well as cysts including Cryptosporidium and Giardia, with performance depending on source-water conditions, maintenance, and proper use.
The ceramic cartridge can be cleaned up to 30 times. Crystal Quest notes it may be cleaned by soaking in a 50/50 hydrogen peroxide and water mix or a 50/50 white vinegar and water mix, with actual cleaning needs depending on water quality, sediment level, usage, and flow performance.
The ceramic cartridge is the core filtration stage. The single configuration includes the ceramic cartridge, the double configuration adds the SMART cartridge, and the triple configuration adds both SMART and carbon block filtration.
Select the installation valve based on the home’s under-sink plumbing and the installation manual. Crystal Quest states that a saddle valve is used for hard copper tubing, while a T-valve is required for flex tubing. A leak detector or flood-prevention valve may be considered as a recommended add-on for added installation protection where appropriate.
This under-sink ceramic water filter is designed for kitchens and point-of-use drinking water setups where under-sink placement is preferred. It connects below the sink and supplies filtered water through the included faucet setup.
Choose the configuration and valve option that match your available installation space, plumbing, and water concerns. Single, double, and triple layouts support different cartridge combinations, while saddle-valve and T-valve selections support different under-sink plumbing setups.
Need help choosing the right ceramic under-sink filter?
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✓ 0.5-micron ceramic cartridge
✓ Cleanable up to 30 times
✓ T-valve and saddle-valve connection choices
| Brand | Crystal Quest |
| Product Type | Ceramic under sink water filtration system |
| Installation Type | Under sink, included faucet setup |
| Configuration Options | Single, double, or triple |
| Cartridge Mapping | Single: ceramic cartridge; Double: ceramic + SMART; Triple: ceramic + SMART + carbon block |
| Installation Valve Guidance | Saddle valve for hard copper tubing; T-valve for flex tubing, per Crystal Quest guidance |
| Connection Size | 1/4" |
| Primary Cartridge Type | Ceramic water filter cartridge |
| Ceramic Filtration Rating | As low as 0.5 microns |
| Ceramic Cartridge Maintenance | Can be cleaned up to 30 times |
| Cleaning Method | Soak in a 50/50 hydrogen peroxide and water mix or a 50/50 white vinegar and water mix, following Crystal Quest guidance |
| Replacement Cartridge SKU | CQE-RC-04005 |
| Replacement Cartridge Size | 2-7/8" × 9-3/4" |
| Estimated Cartridge Life | Varies by influent water quality, sediment level, cleaning frequency, and filter usage; cartridge sources list service-life estimates ranging from 12–24 months. |
| Initial Flush Requirement | Flush cartridge 3–4 times for 5–10 minutes before using the water, per under-sink manual guidance. |
| Additional Cartridge Stages | Double configurations add SMART filtration; triple configurations add SMART and carbon block filtration |
| Max Flow Rate | 0.5 GPM |
| Operating Pressure | 20-60 psi |
| Operating Temperature | 40°F-90°F |
| Single Dimensions | 5" L × 14" H × 5" W |
| Double Dimensions | 10" L × 14" H × 5" W |
| Triple Dimensions | 15" L × 14" H × 5" W |
| Recommended Add-On | Leak detector / flood-prevention valve may be considered where appropriate |
| Installation Note | Follow the installation manual for faucet, valve, connection, and pressure-related setup requirements |
