The Crystal Quest Arsenic 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 an arsenic-selective resin cartridge designed to reduce arsenic, with SMART and carbon block cartridge stages included depending on the selected configuration. The arsenic cartridge has a listed 1,000-gallon capacity, depending on arsenic type and influent parts-per-billion concentration. With a 1/4" connection size, this under-sink arsenic water filter is intended for point-of-use drinking water applications in homes, apartments, offices, and similar settings after arsenic presence and concentration are confirmed through water testing.
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 water testing has identified arsenic as a treatment concern and the included faucet setup is preferred.
The arsenic removal cartridge uses arsenic-selective resin designed specifically for reducing arsenic. Its listed capacity is 1,000 gallons, with actual cartridge life depending on arsenic type, influent concentration, water conditions, and use.
The arsenic cartridge is the core filtration stage. The single configuration includes the arsenic cartridge, the double configuration adds the SMART cartridge, and the triple configuration adds both SMART and carbon block cartridges.
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 arsenic water filter is designed for kitchens and point-of-use drinking water setups where countertop space matters. 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 test results. 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 arsenic under-sink filter?
TrueStead Supply can help you compare configuration size, connection type, and installation requirements.
✓ Arsenic-selective resin cartridge
✓ Single, double, and triple configurations
✓ T-valve and saddle-valve connection choices
| Brand | Crystal Quest |
| Product Type | Arsenic under sink water filtration system |
| Installation Type | Under sink, included faucet setup |
| Configuration Options | Single, double, or triple |
| Cartridge Mapping | Single: arsenic cartridge; Double: arsenic + SMART; Triple: arsenic + 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 | Arsenic-selective resin cartridge |
| Arsenic Cartridge Capacity | 1,000 gallons; depends on arsenic type and influent ppb level |
| Replacement Cartridge Size | 2-7/8" × 9-3/4" |
| Replacement Cartridges | Carbon Block Filter Cartridge CQE-RC-04000; Arsenic Filter Cartridge CQE-RC-04008; SMART Filter Cartridge CQE-RC-04002 |
| Additional Cartridge Stages | Double configurations add SMART filtration; triple configurations add SMART and carbon block filtration |
| Operating Pressure | 20-60 psi |
| Water Testing Note | Arsenic has no taste or odor; water testing should be used to confirm arsenic presence and influent concentration before selecting or replacing treatment cartridges. |
| 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 |
