The Crystal Quest Alkaline 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 setup. It is available in single, double, and triple configurations, with connection choices for T-valve, saddle valve, or both. The system uses an alkalizing cartridge with ionizer media containing magnesium and calcium to help increase oxygenation and drive pH higher. The single configuration includes the alkalizing cartridge, the double configuration adds the SMART cartridge, and the triple configuration adds both SMART and carbon block filtration. With a 1/4" connection size and 10,000-gallon listed capacity, this under-sink alkaline water filter is suitable for drinking water use in homes, apartments, offices, and other point-of-use applications.
This Crystal Quest system installs beneath the sink to keep the filter housing off the countertop. It is designed for point-of-use drinking water applications where alkalizing support and the included faucet setup are preferred.
The alkalizing cartridge uses ionizer media containing magnesium and calcium to help increase oxygenation and raise pH. This gives buyers an under-sink alkalizing option where under-sink placement is preferred.
The alkalizing cartridge is the core stage of the system. The single configuration includes the alkalizing cartridge, the double configuration adds the SMART cartridge, and the triple configuration adds both SMART and carbon block filtration.
Select the T-valve, saddle valve, or both option based on the home’s under-sink plumbing and the installation manual. A leak detector or flood-prevention valve may be considered for added installation protection where appropriate.
This under-sink alkaline 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 goals. Single, double, and triple layouts support different cartridge combinations, while T-valve and saddle-valve selections support different under-sink connection setups.
Need help choosing the right alkaline under-sink filter?
TrueStead Supply can help you compare configuration size, connection type, and installation requirements.
✓ Alkalizing cartridge with mineral media
✓ Single, double, and triple configurations
✓ T-valve and saddle-valve connection choices
| Brand | Crystal Quest |
| Product Type | Alkaline under sink water filtration system |
| Installation Type | Under sink, included faucet setup |
| Configuration Options | Single, double, or triple |
| Cartridge Mapping | Single: alkalizing cartridge; Double: alkalizing + SMART; Triple: alkalizing + SMART + carbon block |
| Connection Type Options | T-valve, saddle valve, or both |
| Connection Size | 1/4" |
| Primary Cartridge Type | Alkalizing water filter cartridge with ionizer media |
| Ionizer Media Minerals | Magnesium and calcium |
| Additional Cartridge Stages | Double configurations add SMART filtration; triple configurations add SMART and carbon block filtration |
| Listed Filtered Water Capacity | 10,000 gallons, or 1-3 years, or when water flow stops or slows greatly |
| 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 |
