The Crystal Quest SMART 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 SMART cartridge uses coconut shell and catalytic granular activated carbon, Eagle Redox Alloy 6500 and 9500 copper-zinc media, and ion exchange resin to help reduce chlorine, select heavy metals, taste, odor, and other contaminants referenced by Crystal Quest when present in tap water. The system has a listed 10,000-gallon filtered-water capacity and 1/4" connection size. It is a practical under-sink option for homes, apartments, and offices that need filtered drinking water without a countertop filter.
This Crystal Quest system installs neatly under the sink to keep the filter housing out of sight. It is designed for point-of-use drinking water applications where the included faucet setup and under-counter placement are preferred.
The system is available in single, double, and triple layouts so buyers can choose the cartridge setup that fits selected filtration needs and available installation space. The single configuration includes the SMART cartridge, the double configuration adds a carbon block cartridge, and the triple configuration adds sediment and carbon block cartridges.
The SMART cartridge combines coconut shell and catalytic granular activated carbon, Eagle Redox Alloy 6500 and 9500 copper-zinc media, and ion exchange resin. This media blend is designed to help reduce chlorine, select heavy metals, pesticides, herbicides, petroleum by-products, VOCs, and other contaminants referenced by Crystal Quest when present in the water.
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 SMART water filter is designed for everyday drinking water use without taking up countertop space. It works well for kitchens, apartments, offices, and households that want filtered water through the included faucet setup.
Choose the configuration and valve option that match your selected filtration needs and plumbing. Single, double, and triple layouts offer different filtration-stage options, while T-valve and saddle-valve selections support different under-sink connection setups.
Need help choosing the right under-sink filter setup?
TrueStead Supply can help you compare configuration size, connection type, and installation requirements.
✓ Single, double, and triple configurations
✓ T-valve and saddle-valve connection choices
✓ 10,000-gallon listed capacity
| Brand | Crystal Quest |
| Product Type | SMART under sink water filtration system |
| Installation Type | Under sink, included faucet setup |
| Configuration Options | Single, double, or triple |
| Cartridge Mapping | Single: SMART cartridge; Double: SMART + carbon block; Triple: sediment + SMART + carbon block |
| Replacement Cartridge Size | 2-7/8" × 9-3/4" |
| Replacement Cartridges | Sediment Filter Cartridge CQE-RC-04001; SMART Filter Cartridge CQE-RC-04002; Carbon Block Filter Cartridge CQE-RC-04000 |
| Installation Valve Guidance | Saddle valve for hard copper tubing; T-valve for flex tubing, per Crystal Quest guidance |
| Connection Size | 1/4" |
| Listed Filtered Water Capacity | 10,000 gallons, or 1-3 years, or when water flow stops or slows greatly |
| 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 |
| Primary Media | Coconut shell and catalytic GAC, Eagle Redox Alloy 6500 and 9500 copper-zinc media, and ion exchange resin |
| Additional Cartridge Stages | Double configurations add carbon block filtration; triple configurations add sediment and carbon block filtration |
| Recommended Add-On | Leak detector / flood-prevention valve may be considered where appropriate |
