Fiberglass / SMART Inline Undersink Water Filter 8GPM - - Crystal Quest Water Filters
Fiberglass / SMART Inline Undersink Water Filter 8GPM - - Crystal Quest Water Filters

Inline Undersink Water Filter 8GPM

SKU CQE-IN-5000

$295.00 SKU CQE-IN-5000

Place conveniently under the sink or directly to your cold water line.

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Configuration, Fiberglass
Filtration Package, SMART
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Shipping

Free shipping on orders over $150

Residential addresses in the lower 48 US states. Excludes business addresses, commercial and industrial systems (which ship by freight), and filter media sold by the bag or cubic foot.

This item ships free

Order by 3:00 PM Eastern on a business day and most filters, cartridges and smaller items leave our facility that same day. Standard residential systems ship within 1 to 2 business days, and whole house, custom and specialty systems typically within 3. So far in 2026, 95% of our orders have shipped within one business day and 99% within five (based on an internal review of our order records).

Once shipped, standard delivery typically arrives in 3 days to the Southeast, Northeast and Southwest, and in 4 days to the Midwest and the West. Need it sooner? UPS 2nd Day Air and Next Day Air are available at checkout for eligible products. Systems that ship by freight can take longer and may need a delivery appointment.

Shipping details and exclusions
30-day returns

Returns are accepted within 30 days of delivery when:

  • The item is new and unused, in its original packaging, with no damaged or missing parts.
  • You ask us for a Return Merchandise Authorization (RMA) number before you send it back.
  • You pay for return shipping. Shipping, handling and restocking fees apply.

Filter cartridges, membranes, reverse osmosis systems, custom or special orders and commercial products cannot be returned.

Read the full return policy
Lifetime support

Our team answers questions about products, orders, installation, troubleshooting and replacement parts.

Phone: 770-951-5600 or (800) 934-0051

Email: help@crystalquest.com. We reply within 24 to 36 hours.

Live chat during business hours

Hours: Monday to Friday, 9:00 AM to 5:00 PM Eastern. We observe U.S. federal holidays.

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Inline Undersink Water Filter 8GPM

Experience the purity and convenience of cleaner, fresher water with the Crystal Quest® Inline Under-Sink Filtration System. Designed for seamless integration into your home or business, this high-capacity system delivers up to 8 gallons per minute, ensuring a continuous flow of purified water without sacrificing pressure.

Crafted for durability and performance, this system is available in your choice of stainless steel or fiberglass tanks, both engineered for long-lasting reliability. Select the filtration package that best fits your needs:

🔹 SMART Package – This system utilizes a multi-stage filtration process, including two types of coconut shell Granulated Activated Carbons (Standard & Catalytic GAC), infused with Eagle Redox Alloys® 6500 & 9500, and ion exchange resin. It effectively reduces a wide range of contaminants such as heavy metals (e.g., lead & mercury), chlorine, chloramine, and inorganic substances like herbicides, pesticides, and petroleum/pharmaceutical by-products. Additionally, it features a mixture of ceramic balls that enhance water quality and help maintain a balanced, more alkaline pH.

 🔹 SMART + Fluoride - Offering all the benefits of the SMART Package, this system also includes advanced fluoride reduction for improved water purity, ensuring a cleaner, healthier drinking experience.

 🔹 SMART + Iron - Combining the SMART Package with enhanced iron removal capabilities, this system targets high iron levels, preventing staining and eliminating any metallic tastes, ensuring high-quality water for everyday use.

 🔹 SMART + Radium / Uranium - This system incorporates the SMART Package with specialized filtration media designed to reduce radium and uranium levels in water, providing enhanced safety and peace of mind.

 🔹 Eagle Package - The Eagle Package includes our SMART media plus our Ionizer blend, which contains natural minerals such as magnesium oxide and calcite (calcium carbonate), along with a mixture of ceramic balls. This blend naturally raises alkalinity and boosts pH, delivering superior water quality.

 🔹 Eagle + Fluoride - This advanced option combines all the benefits of the Eagle Package with added fluoride reduction, ensuring purer, healthier water while enhancing alkalinity and pH for optimal water balance.

Fresh Water Begins Here®