The Crystal Quest Big Blue Whole House Water Filter, Alkalizing is a point-of-entry water filtration system designed for 1-2 person whole-house applications with a manufacturer-listed 4-6 GPM recommended flow rate. This Big Blue system uses a 20" Big Blue cartridge format; Crystal Quest lists system cartridge dimensions as 5" × 20" and replacement cartridges as 4-5/8" × 20". The alkalizing cartridge uses calcium carbonate media to help raise pH, alkalize/ionize, and remineralize water. Depending on the selected configuration, the system can also include SMART filtration and carbon block filtration for additional treatment stages targeting contaminants listed by Crystal Quest. It requires no electricity and no backwashing, making it a practical cartridge-based filtration option for installation at the main water line.
The included alkalizing cartridge uses calcium carbonate media along with mineral and ionizer media to help raise pH and add minerals back into the water. This makes the system a useful fit for homeowners looking for a whole-house cartridge system focused on alkalizing and remineralizing water.
This Crystal Quest Big Blue system can be selected in single, double, or triple configurations. The single configuration includes the alkalizing filter, the double configuration adds SMART filtration, and the triple configuration adds both SMART filtration and a carbon block cartridge.
The system is designed for point-of-entry installation on the home’s main water line. It does not require electricity or backwashing, and the cartridge-based format is built for routine filter changes instead of tank-style media regeneration.
Available options include a floor mount stand, leak detector valve, and 12 GPM UltraViolet Water Sterilizer. These add-ons can help support placement flexibility, water-damage protection, or additional microorganism control when a properly sized ultraviolet sterilizer is selected.
The Big Blue format is built for 1-2 person whole-house applications where homeowners want cartridge-based filtration at the main water line. Choose the cartridge configuration that best matches your water goals and filtration needs.
Single, double, and triple configurations allow the system to scale from alkalizing filtration only to broader multi-cartridge filtration. Optional stand and protection accessories can help tailor the setup to the installation space.
Need help choosing the right Crystal Quest configuration?
Our team can help you compare single, double, and triple cartridge options for your home’s water needs.
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| Brand | Crystal Quest |
| Product Type | Big Blue whole house alkalizing water filter |
| Recommended Flow Rate | 4-6 GPM |
| Recommended Household Size | 1-2 people |
| Configuration Options | Single, double, or triple cartridge configuration |
| Cartridge Dimensions | 5" × 20" |
| Port Size Options | 1" or 1-1/2" inlet/outlet |
| Single Configuration | Alkalizing filter |
| Double Configuration | Alkalizing filter and SMART filter |
| Triple Configuration | Alkalizing filter, SMART filter, and carbon block filter cartridge |
| Power Requirement | No electricity required |
| Backwashing | No backwashing required |
| Pressure Range | 30-60 psi |
| Temperature Range | 40-85°F |
| Water Supply | Potable cold water only |
| Stand Dimensions | Single: 8.5" × 7-3/4" × 32"; Double: 17" × 7-3/4" × 32"; Triple: 24" × 7-3/4" × 32" |
| Optional Accessories | System stand, leak detector valve, ultraviolet sterilizer where available |
Installation Note: Crystal Quest recommends installation by a licensed plumber or qualified contractor. Do not use with microbiologically unsafe or unknown-quality water without adequate disinfection before or after the system.
